Ritchie Group Online Library

• Proposed Pathogenesis for Atypical Femoral Fractures: Lessons from Materials Research by B. Ettinger, D. B. Burr, and R. O. Ritchie, Bone, vol. 55 (2), 2013, pp. 495-500. (doi: 10.1016/j.bone.2013.02.004)

• Structure and Fracture Resistance of Alligator Gar (Atractosteus Spatula) Armored Fish Scales by W. Yang, B. Gludovatz, E. A. Zimmermann, H. A. Bale, R. O. Ritchie and M. A. Meyers, Acta Biomaterialia, vol. 9 (4), 2013, pp. 5876-5889. (doi: 10.1016/j.actbio.2012.12.026)

• Natural Flexible Dermal Armor by W. Yang, I. H. Chen, B. Gludovatz, E. A. Zimmermann, R. O. Ritchie and M. A. Meyers, Advanced Materials, vol. 25 (1), 2013, pp. 31-48. (doi: 10.1002/adma.201202713)

• Prolonged Alendronate Treatment Prevents the Decline in Serum TGF-b1 Levels and Reduces Cortical Bone Strength in Long-Term Estrogen Deficiency Rat Model by J. Jia, Wei Yao, S. Amugongo, M. Shahnazari, W. Dai, Y. E. Lay, D. Olvera, E. A. Zimmermann, R. O. Ritchie, C. S. Li, T. Alliston and N. E. Lane, Bone, vol. 52 (1), 2013, pp. 424-432. (doi: 10.1016/j.bone.2012.10.017)

• Real-Time Quantitative Imaging of Failure Events in Ultrahigh-Temperature Materials under Load at Temperatures above 1600C by H. A. Bale, A. Haboub, A. A. MacDowell, J. R. Nasiatka, D. L. Parkinson, B. N. Cox, D. B. Marshall, and R. O. Ritchie, Nature Materials, vol. 12 (1), 2013, pp. 40-46. (doi: 10.1038/NMAT3497)

• Changes to the Cell, Tissue and Architecture Levels in Cranial Suture Synostosis Reveal a Problem of Timing in Bone Development by J. Regelsberger, P. Milovanovic, T. Schmidt, M. Hahn, E. A. Zimmermann, M. Tsokos, J. Zustin, R. O. Ritchie, M. Amling, and B. Busse, eCells and Materials Journal, vol. 24, 2012, pp. 441-458.

• Mechanical Models to Guide the Development of Synthetic 'Brick and Mortar' Composites by M. R. Begley, N. R. Philips, B. G. Compton, D. V. Wilbrink, R. O. Ritchie, and M. Utz, Journal of Mechanics and Physics of Solids, vol. 60 (8), 2012, pp. 1545-1560. (doi: 10.1016/j.jmps.2012.03.002)
  

• On the Effect of Deep-Rolling and Laser-Peening on the Stress-Controlled Low- and High-Cycle Fatigue Behavior of Ti-6Al-4V at Elevated Temperatures up to 550°C by I. Altenberger, R. K. Nalla, Y. Sano, L. Wagner, and R. O. Ritchie, International Journal of Fatigue, vol. 44, 2012, pp. 292-302. (doi: 10.1016/j.ijfatigue.2012.03.008)
  

• On the Multiscale Origins of Fracture Resistance in Human Bone and its Biological Degradation by E. A. Zimmermann, H. D. Barth, and R. O. Ritchie, Journal of Materials, vol. 64 (4), 2012, pp. 486-493. (doi: 10.1007/s11837-012-0298-0)
  

• Sidewall Adhesion and Sliding Contact Behavior of Polycrystalline Silicon Microdevices Operated in High Vacuum by D. H. Alsem, H. Xiang, R. O. Ritchie, and K. Komvopoulos, Journal of Microelectromechanical Systems, vol. 21 (2), 2012, pp. 359-369. (doi: 10.1109/JMEMS.2011.2180364)
  

• Hydrogen-Induced Intergranular Failure in Nickel Revisited by M. L. Martin, B. P. Somerday, R. O. Ritchie, P. Sofronis and I. M. Robertson, Acta Materialia, vol. 60, 2012, pp. 2739-2745. (doi: 10.1016/j.actamat.2012.01.040)
  

• Fatigue as a Mechanism of Water Tree Propagation in TR-XLPE by Z. Wang, P. Marcolongo, J. A. Lemberg, B. Panganiban, J. W. Evans, R. O. Ritchie, and P.K. Wright, IEEE Transactions on Dielectrics and Electrical Insulation, vol. 19 (1), Feb. 2012, pp. 321-330. (doi: 10.1109/TDEI.2012.6148534)
  

• Directing mesenchymal stem cells to bone to augment bone formation and increase bone mass by M. Guan, W. Yao, R. Liu, K. S. Lam, J. Nolta, J. Jia, B. Panganiban, L. Meng, P. Zhou. M. Shahnazari, R. O. Ritchie, and N. E. Lane, Nature Medicine, vol. 18 (3), March 2012, pp. 456-462. (doi: 10.1038/nm.2665)
  

• Mechanical fatigue and fracture of Nitinol by S. W. Robertson, A. R. Pelton, and R. O. Ritchie, International Materials Reviews, vol. 57 (1), 2012, pp. 1-36. (doi: 10.1179/1743280411Y.0000000009)
  

• Mixed-mode toughness of human cortical bone containing a longitudinal crack in far-field compression by D. Olvera, E. A. Zimmermann, and R. O. Ritchie, Bone, vol. 50, 2012, pp. 331-336. (doi: 10.1016/j.bone.2011.11.004)
  

• Characterization and Mechanical Testing of Alumina-Based Nanocomposites Reinforced with Niobium and/or Carbon Nanotubes Fabricated by Spark Plasma Sintering by K. E. Thomson, D. Jiang, W. Yao, R. O. Ritchie, and A. K. Mukherjee, Acta Materialia, vol. 60, 2012, pp. 622-632. (doi: 10.1016/j.actamat.2011.10.002)
  

• The Conflicts between Strength and Toughness by R. O. Ritchie, Nature Materials, vol. 10 (11), Nov. 2011, pp. 817-822. (doi: 10.1038/nmat3115)
  

• On the Fracture Toughness of Fine-Grained Mo-3Si-1B (wt.%) Alloys at Ambient to Elevated (1300°C) Temperatures by J. A. Lemberg, M. R. Middlemas, T. Weingartner, B. Gludovatz, J. K. Cochran, and R. O. Ritchie, Intermetallics, vol. 20 (1), Jan. 2012, pp. 141-154.

• Characterizing Three-Dimensional Textile Ceramic Composites using Synchrotron X-Ray Computed Micro-Tomography by H. Bale, M. Blacklock, M. R. Begley, D. B. Marshall, B. N. Cox, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 95 (1), Jan 2012, pp. 392-402. (doi: 10.1111/j.1551-2916.2011.04802).

• Characterization of the Effects of X-Ray Irradiation on the Hierarchical Structure and Mechanical Properties of Human Cortical Bone by H. D. Barth, E. A. Zimmermann, E. Schaible, S. Y. Tang, T. Alliston, and R. O. Ritchie, Biomaterials, vol. 32 (34), Dec. 2011, pp. 8892-8904. (doi: 10.1016/j.biomaterials.2011.08.013).

• Age-Related Changes in the Plasticity and Toughness of Human Cortical Bone at Multiple Length-Scales by E. A. Zimmermann, E. Schaible, H. Bale, H. D. Barth, S. Y. Tang, P. Reichert, B. Busse, T. Alliston, J. W. Ager III, and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 108 (35), Aug. 2011, pp. 14416-14421. (doi: 10.1073/pnas.1107966108)

• Impact of Thermomechanical Texture on the Superelastic Response of Nitinol Implants by M. Barney, D. Xu, S. W. Robertson, V. Schroeder, R. O. Ritchie, A. R. Pelton and A. Mehta, Journal of the Mechanical Behavior of Biomedical Materials, vol. 4 (7), Oct. 2011, pp. 1431-1439.
  

• Effect of Aging on the Transverse Toughness of Human Cortical Bone: Evaluation by R-Curves by K. J. Koester, H. D. Barth, and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 4, 2011, pp. 1504-1513.
  

• An Equivalent St rain/Coffin-Manson Approach to Multiaxial Fatigue and Life Prediction in Superelastic Nitinol Medical Devices by A. Runciman, D. Xu, A. R. Pelton and R. O. Ritchie, Biomaterials, vol. 32, 2011, pp. 4987-4993.
  

• Differential Maintenance of Cortical and Cancellous Bone Strength following Discontinuation of Bone Active Agents by M. Shahnazari, W. Yao, B. Panganiban, R. O. Ritchie,Y. Hagar, and N. E. Lane, Journal of Bone and Mineral Research, vol. 26, March 2011, pp. 569-581.

• A Damage Tolerant Glass by M. D. Demetriou, M. E. Launey, G. Garret, J. P. Schramm, D. C. Hofmann, W. L. Johnson, and R. O. Ritchie, Nature Materials, vol. 10 (2), Feb. 2011 (published online Jan. 10, 2011).

• Fatigue-Induced Grain Coarsening in Nanocrystalline Platinum Films by R. A. Meirom, D. H. Alsem, A. L. Romasco, T. Clark, R. Polcawich, J. Pulskamp, M. Dubey, R. O. Ritchie, and C. L. Muhlstein, Acta Materialia, vol. 59 (3) Feb. 2010, pp. 1141-1149.

• Decrease in the Osteocyte Lacunae Density Accompanied by Hypermineralized Lacunar Occlusion Reveal Failure and Delay of Remodeling in Aged Human Bone by B. Busse, D. Djonic, P. Milovanovic, M. Hahn, K. Püschel, R. O. Ritchie, M. Djuric, and M. Amling,  Aging Cell, vol. 9, 2010, pp. 1065-1075.

• Scaling of Strength and Ductility in Bioinspired Brick and Mortar Composites by D. V. Wilbrink, M. Utz, R. O. Ritchie, and M. R. Begley, Applied Physics Letters, vol. 97 (19), Nov. 2010, pp. 193701.

• Changes in Cortical Bone Response to High-Fat Diet from Adolescence to Adulthood in Mice by S. S. Ionova-Martin, J. M. Wade, S. Tang, M. Shahnazari, J. W. Ager III, N. E. Lane, W. Yao, T. Alliston, C. Vaisse, and R. O. Ritchie, Osteoporosis International, vol. 22 (8), Aug. 2011, pp. 2283-2293.

• Wear Mechanisms and Friction Parameters for Sliding Wear of Micron-Scale Polysilicon Sidewalls by D. H. Alsem, R. van der Hulst, E. A. Stach, M. T. Dugger, J. Th. M. de Hosson, and R. O. Ritchie, Sensors and Actuators A, vol. 163, 2010, pp. 373-382.

• The Significance of Crack-Resistance Curves to the Mixed-Mode Fracture Toughness of Human Cortical Bone by E. A. Zimmermann, M. E. Launey, and R. O. Ritchie, Biomaterials, vol. 31 (20), Aug. 2010, pp. 5297-5308.

• On the Effect of X-ray Irradiation on the Deformation and Fracture Behavior of Human Cortical Bone by H. D. Barth, M. E Launey, A. A. MacDowell, and R. O. Ritchie, Bone, vol. 46, June 2010, pp. 1475-1485.

• Microindentation for In Vivo Measurement of Bone Tissue Mechanical Properties in Humans by A. Diez-Perez, R. Güerri, X. Nogues, E. Cáceres, M. J. Peña, L. Mellibovsky, C. Randall, D. Bridges, J. Weaver, A. Proctor, D. Brimer, K. J. Koester, R. O. Ritchie, and P. K. Hansma, Journal of Bone and Mineral Research, vol. 25, 2010, pp. 1877-1885.

• On the Mechanistic Origins of Toughness in Bone by M. E. Launey, M. J. Buehler, and R. O. Ritchie, Annual Review of Materials Research, vol. 40, 2010, pp. 25-53.

• Osteopontin Deficiency Increases Bone Fragility but Preserves Bone Mass by P. J. Thurner, C. G. Chen, S. Ionova-Martin, L. Sun, A. Harman, A. Porter, J. W. Ager III, R. O. Ritchie, and T. Alliston, Bone, vol. 46, June 2010, pp. 1564-1573.

• Atomic-Scale Imaging and the Effect of Yttrium on the Fracture Toughness of Silicon Carbide Ceramics by A. M. Kueck, Q. M. Ramasse, L. C. De Jonghe, and R. O. Ritchie, Acta Materialia, vol. 58 (8), May 2010, pp. 2999-3005.

• Mechanical Properties of Si3N4-Al2O3 FGM Joints with 15 Layers for High-Temperature Applications by C. S. Lee, J. A. Lemberg, D. G. Cho, J. Y. Roh, and R. O. Ritchie, Journal of the European Ceramic Society, vol. 30, 2010, pp. 1743-1749.

• The Effects of Cubic Stiffness on Fatigue Characterization Resonator Performance by M. Budnitzki, M. C. Scates, R. O. Ritchie, E. A. Stach, C. L. Muhlstein, and O. N. Pierron, Sensors and Actuators A, vol. 157 (2), Feb. 2010, pp. 228-234.

• Mechanistic Aspects of the Fracture Toughness of Elk Antler Bone by M. E. Launey, P.-Y. Chen, J. McKittrick, and R. O. Ritchie, Acta Biomaterialia, vol. 6, April 2010, pp. 1505-1514.

• Higher Doses of Bisphosphonates Further Improve Bone Mass, Architecture and Strength but not the Tissue Materials Properties in Aged Rats by M. Shahnazari, W. Yao, W-W. Dai, B. Wang, A. J. Burghardt, S. S. Ionova-Martin, R. O. Ritchie, D. Heeren, A. J. Burghardt, D. P. Nicolella, M. G. Kimiecik, and N. E. Lane, Bone, vol. 46 (5), May 2010, pp. 1267-1274.

• A Statistical, Physical-Based, Micro-Mechanical Model of Hydrogen-Induced Intergranular Fracture in Steel by P. Novak, R. Yuan, B. P. Somerday, P. Sofronis, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 58, (2), 2010, pp. 206-226..

• Reduced Size-Independent Mechanical Properties of Cortical Bone in High-Fat Diet Obesity by S. S. Ionova-Martin, S. H. Do, H. D. Barth, M. Szadkowska, A. E. Porter, J. W. Ager III, J. W. Ager, T. Alliston, C. Vaisse, and R. O. Ritchie, Bone, vol. 46, 2010, pp. 217-225.

• A Novel Biomimetic Approach to the Design of High-Performance Ceramic/Metal Composites by M. E. Launey, E. Munch, D. H. Alsem, E. Saiz, A. P. Tomsia, and R. O. Ritchie Journal of the Royal Society Interface, vol. 7, 2010, pp. 741-753.

• Mixed-Mode Fracture of Human Cortical Bone by E. A. Zimmermann, M. E. Launey, H. D. Barth, and R. O. Ritchie, Biomaterials, vol. 30, 2009, pp. 5877-5884.

• Fracture Toughness and Crack-Resistance Curve Behavior in Metallic Glass-Matrix Composites by M. E. Launey, D. C. Hofmann, J.-Y. Suh, H. Kzachkov, W. L. Johnson, and R. O. Ritchie, Applied Physics Letters, vol. 94, June 2009, p. 241910.

• Prolonged Treatments with Anti-Resorptive Agents and PTH have Different Effects on Bone Strength and the Degree of Mineralization in Estrogen Deficient Osteoporosis in Aged Female Rats by Z. Cheng, W. Yao, E. Zimmerman, C. Busse, R. O. Ritchie, and N. E. Lane, Journal of Bone and Mineral Research,  vol. 24 (2), Feb. 2009, pp. 209-220.

• On the Use of Grain-Boundary Engineering to Enhance Resistance to Intergranular Embrittlement due to Hydrogen in Metallic Materials by S. Bechtle, M. Kumar, B. P. Somerday, M. E. Launey, and R. O. Ritchie, Acta Materialia, 2009.

• Plasticity and Toughness in Bone by R. O. Ritchie, M. J. Beuhler, and P. Hansma, Physics Today, vol. 62 (6), June 2009, pp. 41-47.

• Pharmacologic Inhibition of the TGF-b Type I Receptor has Anabolic and Anti-Catabolic Effects on Bone by K. S. Mohammad, C. Chen, G. Balooch, E. Stebbins, E. Stebbins, C. R. McKenna, H. Davis, M. Niewolna, X. H. Peng, D. H. N. Nguyen, S. S. Ionova-Martin, J. W. Bracey, W. R. Hogue, D. H. Wong, R. O. Ritchie, L. J. Suva, R. Derynck, T. A. Guise, and T. Alliston, The Public Library of Science - One, vol. 4, April 2009, p. e5275.

• Designing Highly Toughened Hybrid Composites Through Nature-Inspired Hierarchical Complexity by M. E. Launey, E. Munch, D. H. Alsem, H. D. Barth, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Acta Materialia, vol.57, 2009, pp. 2919-2932.

• Solution to the Problem of the Poor Cyclic Fatigue Resistance of Bulk Metallic Glasses by M. E. Launey, D. C. Hofmann, W. L. Johnson, and R. O. Ritchie, Proceedings of the National Academy of Sciences (PNAS), vol. 106, 2009, pp. 4986-4991.

• On the Fracture Toughness of Advanced Materials by M. E. Launey and R. O. Ritchie, Advanced Materials, vol. 21 (20), 2009, pp. 2103-2110.

• Weakening of Dentin from Cracks Resulting from Laser Irradiation by M. Staninec, N. Meshkin, S. K. Manesh, R. O. Ritchie, and D. Fried, Dental Materials, vol 25, 2009, pp 520-525.

• Indentation Techniques for Evaluating the Fracture Toughness of Biomaterials and Hard Tissues by J. J. Kruzic, D. K. Kim, K. J. Koester, and R. O. Ritchie,  Journal of the Mechanical Behavior of Biomedical Materials, vol. 2, 2009, pp. 384-395.

• Glucocorticoid-Induced Bone Loss in Mice Can Be Reversed by the Actions of Parathyroid Hormone and Risedronate on Different Pathways for Bone Formation and Mineralization by W. Yao, Z. Cheng, A. Pham, C. Busse, E. Zimmerman, R. O. Ritchie, and N. E. Lane, Arthritis and Rheumatism, vol. 58, 2008, pp. 3485-3497.

• Tough Bio-Inspired Hybrid Materials by E. Munch, M. E. Launey, D. H. Alsem, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Science, vol. 322 (5907), Dec 5, 2008, pp. 1516-1520.

• Micron-Scale Friction and Sliding Wear of Polycrystalline Silicon Thin Structural Films in Ambient Air by D.H. Alsem, M.T. Dugger, E.A. Stach, and R.O. Ritchie, Journal of Microelectromechanical Systems, vol. 17, 2008, pp. 1144-1154.

• Atomic-resolution imaging of the nanoscale origin of toughness in rare-earth doped SiC by A. M. Kueck, D. K. Kim, Q. M. Ramasse, L. C. De Jonghe, and R. O. Ritchie, Nano Letters, vol. 8, 2008, pp. 2935-2939.

• Measurement of the Toughness of bone: A Tutorial with Special Reference to Small Animal Studies by R.O. Ritchie, K.J. Koester, S. Ionova, W. Yao, N.E. Lane, J.W. Ager III, Bone, vol. 43, 2008, pp. 798-812.

• Effect of the Post-Release Sidewall Morphology on the Fracture and Fatigue Properties of Polycrystalline Silicon Structural Films by D. A. Alsem, B. L. Boyce, E. A. Stach, and R. O. Ritchie, Sensors and Actuators A, vol. 147, 2008, pp. 553-560.

• Comments on "Measurement of the Microstructural Fracture Toughness of Cortical Bone using Indentation Fracture" by J. J. Kruzic and R. O. Ritchie, Journal of Biomechanics, vol. 41, 2008, pp. 1379-1380.

• How Tough is Human Bone? In Situ Measurements on Realistically Short Cracks by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Nature Materials, Nature Materials, vol. 7, 2008, pp. 672-677.

• The Utility of R-Curves for Understanding Fracture Toughness-Strength Relations in Bridging Ceramics by J. J. Kruzic, R. L. Sadat, M. J. Hoffmann, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 91, 2008, pp. 1986-94.

• Adhesion between Biodegradable Polymers and Hydroxyapatite: Relevance to Synthetic Bone-Like Materials and Tissue Engineering Scaffolds by R. Neuendorf, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Acta Biomaterialia, vol. 4, 2008, pp. 1288-1296.

• Aging and Fracture of Human Cortical Bone and Tooth Dentin by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Journal of Materials, vol. 80, June 2008, pp. 33-38.

• Further Considerations on the High-Cycle Fatigue of Micron-Scale Polycrystalline Silicon by D. H. Alsem, C. L. Muhlstein, E. A. Stach, and R. O. Ritchie, Scripta Materialia, vol. 59, 2008, pp. 931-935.

• Fatigue of Dentin-Composite Interfaces with Four-Point Bend by M. Staninec, P. Kim, G. W. Marshall, R. O. Ritchie, and S. J. Marshall, Dental Materials, vol. 24, 2008, pp. 799-803.

• On the Toughening of Brittle Materials by Grain Bridging: Promoting Intergranular Fracture Through Grain Angle, Strength and Toughness J. W. Foulk III, G. C. Johnson, P. A. Klein, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 56, 2008, pp. 2381-2400.

• Effect of Microstructure on the Fatigue of Hot Rolled and Cold Drawn NiTi Shape Memory Alloys by K. Gall, J. Tyber, G. Wilkesanders, S. W. Robertson. R. O. Ritchie, and H. J. Maier, Materials Science and Engineering A, vol. 486, 2008, pp.389-403.

• In-Situ Bend Testing of Niobium-Reinforced Alumina Nanocomposites with and without Single-Walled Nanotubes by K. E. Thomson, D. Jiang, J. A. Lemberg, K. J. Koester, R. O. Ritchie, and A. K. Mukherjee, Materials Science and Engineering A, vol. 493, 2008, pp. 256-260.

• Four-Point Bending Evaluation of Dentin-Composite Interfaces by M. Staninec, H. Nguyen, P. Kim, G. W. Marshall, R. O. Ritchie, Medicina Oral, Patolog�ca Oral Y Cirug�ca Bucal, vol. 13, 2008, pp. E81-84. 

• The Effect of Aging on Crack-Growth Resistance and Toughening Mechanisms in Human Dentin by K. J. Koester, J. W. Ager III, and R. O. Ritchie, Biomaterials, vol. 29, 2008, pp. 1318-1328. 

• A Fracture-Mechanics Based Approach to Fracture Control in Biomedical Devices Manufactured from Superelastic Nitinol Tube by S. W. Robertson and R. O. Ritchie, Journal of Biomedical Materials Research B: Applied Biomaterials, vol. 84B, Jan. 2008, pp. 26-33. 

• The Aminobisphosphonate, Risedronate, Preserves Localized Mineral and Material Properties of Bone in the Presence of Glucocorticoids by G. Balooch, W. Yao, J. W. Ager III, M. Balooch, R. K. Nalla, A. E. Porter, A. Mastroianni, R. O. Ritchie, and N. E. Lane, Arthritis and Rheumatism, vol. 56, 2007, pp. 3726-3737.

• Of the Physics of Moisture-Induced Cracking in Metal-Glass (Copper/Silica) Interfaces by J. C. Card, R. M. Cannon, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Journal   of Applied Physics, vol. 102, 2007, pp. 053516-12.

• Atomic-Scale Observation of the Grain-Boundary Structure of Yb-Doped and Heat-Treated Silicon Nitride Ceramics by A. Ziegler, M. K. Cinibulk, C. Kisielowski, and R. O. Ritchie, Applied Physics Letters, vol. 91, Oct. 2007, pp. 141906.

• A Preservation Study of Carbon Nanotubes in Alumina-Based Nanocomposites via Raman Spectroscopy and Nuclear Magnetic Resonance by K. E. Thomson, D. Jiang, R. O. Ritchie, and A. K. Mukherjee, Applied Physics A, vol. 89, 2007, pp. 651-654.

• Evolution of Crack-Tip Transformation Zones in Superelastic Nitinol Subjected to In Situ Fatigue: A Fracture Mechanics and Synchrotron X-Ray Micro-Diffraction Analysis by S. W. Robertson, A. Mehta, A. R. Pelton, and R. O. Ritchie, Acta Materialia, vol. 55, Oct. 2007, pp. 6198-6207.

• The Degree of Bone Mineralization is Maintained with Single Intravenous Bisphosphonates in Aged Estrogen Deficient Rats and is a Strong Predictor of Bone Strength by W. Yao, Z. Cheng, K. J. Koester, J. W. Ager III, M. Balooch, A. Pham, S. Chefo, C. Busse, R. O. Ritchie, and N. E. Lane, Bone, vol. 41, Nov. 2007, pp. 804-812.

• Stress-Corrosion Crack Growth of Si-Na-K-Mg-Ca-P-O Bioactive Glasses in Simulated Human Physiological Environment by D. R. Bloyer, J. M. McNaney, R. M. Cannon, E. Saiz, A. P. Tomsia, and R. O. Ritchie, Biomaterials, vol. 28 (33), Nov. 2007, pp. 4901-4911.

• Fatigue of Mineralized Tissues: Bone and Dentin by J. J. Kruzic and R. O. Ritchie, Journal of the Mechanical Behavior of Biomedical Materials, vol. 1 (1), Jan. 2007, pp. 3-17.

• Analysis of the Material Proporties of Chondrogenic Differentiated Adipose-Derived Adult Stromal Cells (ASC) Using an In Vitro Three-dimensional Micromass Culture System by Y. Xu, G. Balooch, R. O. Ritchie, M. Chiou, E. Bakerman, and M. T. Longaker, Biochemical and Biophysical Research Communications, vol. 359, July 2007, pp. 311-316.

• On the Fatigue-Crack Growth Properties of Thin-Walled Superelastic Austenitic Nitinol Tube for Endovascular Stents by J. M. Stankiewicz, S. W. Robertson, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 81A, 2007, pp. 685-691.

• Understanding the Deformation and Fracture of Nitinol using In Situ Synchrotron X-Ray Micro-Diffraction by A. Metha, X.-Y. Gong, V. Imbeni, A. R. Pelton, and R. O. Ritchie, Advanced Materials, 2007.

• Elastic Constants and Tensile Properties of Al2O3 by Density Functional Calculations by R. Yu, X. F. Zhang, L. C. De Jonghe, and R. O. Ritchie, Physical Review B, vol. 75, 2007, pp. 104114.

• High-Cycle Fatigue of Nickel-Base Superalloy Ren� 104 (ME3): Interaction of Microstructurally-Small Cracks with Grain Boundaries of Known Character by Y. Gao, J. S. St�lken, M. Kumar, and R. O. Ritchie, Acta Materialia, vol. 55, 2007, pp. 3155-3167.

• Mechanisms for Fatigue of Micron-Scale Silicon Structural Films by D. H. Alsem, O. N. Pierron, E. A. Stach, C. L. Muhlstein, and R. O.
  Ritchie, Advanced Engineering Materials, vol. 9, 2007, pp. 15-30.

• In Vitro Fatigue-Crack Growth and Fracture Toughness Behavior of Thin-Walled Superelastic Nitinol Tube for Endovascular Stents: A Basis for Defining the Effects of Crack-Like Defects by S. W. Robertson and R. O. Ritchie, Biomaterials, vol. 28, 2007, pp. 700-709.

• An Electron  Microscopy Study of Wear in Polysilicon Microelectromechanical Systems by D. H. Alsem, E. A. Stach, M. T. Dugger, M. Enachescu, and R. O. Ritchie, Thin Solid Films, vol. 515, 2007, pp. 3259-3266.

• Fatigue Failure in Micron-Scale Polycrystalline Silicon Films: Influence of Environment and Surface Oxide Thickness by D. H. Alsem, R. Timmerman, B. L. Boyce, E. A. Stach, J. Th. M. De Hosson, and R. O. Ritchie, Journal of Applied Physics, vol. 101 (1), 2007, pp. 013515.

• A Micromechanical Basis for Partitioning the Evolution of Grain Bridging in Brittle Materials by J. W. Foulk III, R. M. Cannon, G. C. Johnson, P. A. Klein, and R. O. Ritchie, Journal of the Mechanics and Physics of Solids, vol. 55, 2007, pp. 719-743.

• Role of Alcohol on the Fracture Resistance of Teeth by R. K. Nalla, J. H. Kinney, A. P. Tomsia, and R. O. Ritchie, Journal of Dental Research, vol. 85, 2006, pp. 1022-1026.  

• On the Increasing Fragility of Human Teeth with Age: A Deep-UV Resonance Raman Study by J. W. Ager III, R. K. Nalla, G. Balooch, G. Kim, M. Pugach, S. Habelitz, G. W. Marshall, J. H. Kinney, and R. O. Ritchie, Journal of Bone and Mineral Research, vvol. 21, Dec. 2006, pp. 1879-1887. 

• Kitagawa-Takahashi diagrams define the limiting conditions for cyclic fatigue failure in human dentin J. J. Kruzic and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 79A, Dec. 2006. 

• Cortical Bone Fracture by R. O. Ritchie, J. H. Kinney, J. J. Kruzic, and R. K. Nalla, Wiley Encyclopedia of Biomedical Engineering, Metin Akay, ed., 2006 

• Fracture, Aging and Disease in Bone by J. W. Ager, III, G. Balooch and R. O. Ritchie,  Journal of Materials Research, vol. 21, 2006, pp. 1878-1892 

• Interfacial Structure in Silicon Nitride Sintered with Lanthanide Oxide  by . W. Dwyer, A. Ziegler, N. Shibata, G. B. Winkelman, R. L. Satet, M. J. Hoffmann, M. K. Cinibulk, P. F. Becher, G. S. Painter, N. D. Browning, D. J. H. Cockayne, R. O. Ritchie, and S. J. Pennycook, Journal of Materials Science, vol. 41, 2006, pp. 4405-4412. 

• Canine Cranial Reconstruction Using Autologous Bone Marrow Stromal Cells by M. H. Mankani, S. A Kuznetsov, B. Shannon, R. K. Nalla, R. O. Ritchie, Y. Qin, P. G. Robey, American Journal of Pathology, vol. 168, 2006, pp. 542-550. 

• Effect of Product Form and Heat Treatment on the Crystallographic Texture of Austenitic Nitinol by S. W. Robertson, X.-Y. Gong, and R. O. Ritchie, Journal of Materials Science, vol. 41, 2006, pp. 621-630. 

• Stress-Corrosion Fatigue-Crack Growth in a Zr-Based Bulk Amorphous Metal by V. Schroeder and R. O. Ritchie,  Acta Materialia, vol. 54,  April 2006, pp. 1785-1794.

• Propagation of Surface Fatigue Cracks in  Human Cortical Bone by J. J. Kruzic, J. Scott, R. K. Nalla, and R. O. Ritchie, Journal of Biomechanics, vol. 39, 2006,                  pp.968-972.

• Atomic-Resolution Observation of Semi-Crystalline Intergranular Thin Films in Silicon Nitride by A. Ziegler, J. C. Idrobo, M. K. Cinibulk, C. Kisielowski, N. D. Browning, and R. O. Ritchie, Applied Physics Letters, vol. 88, 2006, p. 141919.

• Re-Evaluating the Toughness of Human Cortical Bone by Q. D. Yang, B. N. Cox, R. K. Nalla, and R. O. Ritchie, Bone, vol. 38, 2006, pp. 878-887.

• Fracture Length Scales in Human Cortical Bone: The Necessity of Nonlinear Fracture Models by Q. D. Yang, B. N. Cox, R. K. Nalla, and R. O. Ritchie, Biomaterials, vol. 27, 2006, pp.2095-2113.

• Fatigue and Life Prediction  for Cobalt-Chromium Stents: A Fracture Mechanics Analysis by R. V. Marrey, R. Burgermeister, R. B. Grishaber, and R. O. Ritchie, Biomaterials, vol. 27, 2006, pp.1988-2000.

• TGF-beta Regulates the Mechanical Properties and Composition of Bone Matrix by G. Balooch, M. Balooch, R. K. Nalla, S. Schilling, E. Filvaroff, G. W. Marshall, S. J. Marshall, R. O. Ritchie, R. Derynck, and T. Alliston, Proceedings of the National Academy of Sciences (PNAS), vol. 102 Dec. 2005.

• On the Improvement of the Ductility of Molybdenum by Spinel (MgAl2O4) Particles by J. H. Schneibel, M. P. Brady, J. J. Kruzic, and R. O. Ritchie, Zeitschrift f\FCr Metallkunde, vol. 96, 2005, pp. 632-637.

• Ab Initio Structural Energetics of beta-Si3N4 Surfaces by J. C. Idrobo, H. Iddir, S. \D6ğ\FCt, A. Ziegler, N. D. Browning, and R. O. Ritchie, Physical Review B, vol. 72, Dec. 2005.

• High-Cycle Fatigue of a Nickel-Base Superalloy ME3 at Ambient and Elevated Temperatures: Role of Grain-Boundary Engineering by Y. Gao, M. Kumar, R. K. Nalla, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 36A (12), Dec. 2005, pp. 3325-3333.

• Role of Microstructure in the Aging-Related Deterioration of the Toughness of Human Cortical Bone by R. K. Nalla. J. J. Kruzic, J. H. Kinney, M. Balooch, J. W. Ager, III, and R. O. Ritchie, Materials Science and Engineering C, vol. 26, 2006, pp. 1251-1260.

• Fabrication and Mechanical Properties of PLA/HA Composites: A Study of In Vitro Degradation by J. Russias, E. Saiz, R. K. Nalla, K. Gryn, R. O. Ritchie, and A. P. Tomsia, Materials Science and Engineering C, vol. 26, 2006, pp. 1289-1295.

• Ambient- to Elevated-Temperature Fracture and Fatigue Properties of Mo-Si-B Alloys: Role of Microstructure by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 36A, Sept. 2005, pp. 2393-2402.

• Ultrastructural Examination of Dentin using Focused Ion-Beam Cross-Sectioning and Transmission Electron Microscopy by R. K. Nalla, A. E. Porter, C. Dariao, A. M. Minor, V. Radmilovic, E. A. Stach, A. P. Tomsia, and R. O. Ritchie, Micron, vol. 36, Oct.-Dec., 2005, pp. 672-680.

• Nanocrystal-Powered Nanomotor by B. C. Regan, S. Aloni, K. Jensen, R. O. Ritchie, and A. Zettl, Nano Letters, vol. 5, 2005, pp. 1730-1733.

• Simple and Accurate Fracture Toughness Testing Methods for Pyrolytic Carbon/Graphite Composites used in Heart-Valve Prostheses by J. J. Kruzic, S. J. Kuskowski, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 74A, 2005, pp. 461-464.

• A Transmission Electron Microscopy Study of Mineralization in Age-Induced Transparent Dentin by A. E. Porter, R. K. Nalla, A. Minor, J. R. Jinschek, C. F. Kisielowski, V. Radmilovic, J. H. Kinney, A. P. Tomsia, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 7650-7660.

• Deep-Ultraviolet Raman Spectroscopy Study of the Effect of Aging on Human Cortical Bone by J. W. Ager, III, R. K. Nalla, K. L. Breeden, and R. O. Ritchie, Journal of Biomedical Optics, vol. 10, May/June 2005, pp. 034012.

• Effects of Moisture on Grain-Boundary Strength, Fracture and Fatigue Properties of Polycrystalline Alumina by J. J. Kruzic, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 88, 2005, pp. 2236-2245.

• On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High-Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic: Role of Oxygen by A. Ziegler, J. M. McNaney, M. J. Hoffmann, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 88, July 2005, pp. 1900-1908.

• Dentin Erosion Simulation by Cantilever-Beam Fatigue and pH Change by M. Staninec, R. K. Nalla, J. F. Hilton, R. O. Ritchie, L. G. Watanabe, G. Nonomura, G. W. Marshall, and S. J. Marshall, Journal of Dental Research, vol. 84,  2005, pp. 371-375.

• Incomplete Similarity and Fatigue-Crack Growth by R. O. Ritchie, International Journal of Fracture, vol. 132 , April 2005, pp. 197-203.

• Fatigue Threshold R-Curves for Predicting the Reliability of Ceramics under Cyclic Loading Conditions by J. J. Kruzic, R. M. Cannon, J. W. Ager, III, and R. O. Ritchie, Acta Materialia, vol. 53,  2005, pp. 2595-2605.

• Optimization of Mo-Si-B Intermetallic Alloys by J. H. Schneibel, R. O. Ritchie, J. J. Kruzic, and P. R. Tortorelli, Metallurgical and Materials Transactions A, vol. 36A, 2005, pp. 525-531.

• On the Effect of Local Grain-Boundary Chemistry on the Macroscopic Mechanical Properties of a High Purity Y2O3-Al2O3-Containing Silicon Nitride Ceramic by A. Ziegler, J. M. McNaney, M. J. Hoffmann, and R. O. Ritchie, in Electron Microscopy of Molecular and Atom-Scale Mechanical Behavior, Chemistry, and Structure, MRS Symp. Proc., vol. 839, 2005.

• Role of Microstructure in Promoting Fracture and Fatigue Resistance in Mo-Si-B Alloys by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, in Integrative and Interdisclipinary Aspects of Intermetallics, MRS Symp. Proc., vol. 842, 2005.

• A Fracture Mechanics and Mechanistic Approach to the Failure of Cortical Bone by R. O. Ritchie, J. H. Kinney, J. J. Kruzic, and R. K. Nalla, Fatigue & Fracture of Engineering Materials & Structures, vol. 28, 2005, pp. 345-371.

• The Dentin-Enamel Junction and the Fracture of Human Teeth by V. Imbeni, J. J. Kruzic, G. W. Marshall, S. J. Marshall, and R. O. Ritchie, Nature Materials, vol. 4, March 2005, pp. 229-232.

• Fatigue Failure in Thin-film Polycrystalline Silicon is due to a Subcritical Cracking within the Oxide Layer by D. H. Alsem, E. A. Stach, C. L. Muhlstein, and R. O. Ritchie, Applied Physics Letters, vol. 86, 2005, pp. 041914

• Crystallographic Texture for Tube and Plate of the Superelastic/Shape-Memory Alloy Nitinol Used for Endovascular Stents by S. W. Robertson, V. Imbeni, H.-R. Wenk, and R. O. Ritchie, Journal of Biomedical Materials Research A, vol. 72A, 2005, pp. 190-199.

• Effects of Polar Solvents on the Fracture Resistance of Dentin: Role of Water Hydration by R. K. Nalla, M. Balooch, J. W. Ager, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Acta Biomaterialia, vol. 1, 2005, pp. 31-43.

• Age-Related Transparent Root Dentin: Mineral Concentration, Crystallite Size, and Mechanical Properties by J. H. Kinney, R. K. Nalla, J. A. Pople, T. M. Breunig, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 3363-3376.

• Aspects of In Vitro Fatigue-Crack Growth in Human Cortical Bone: Time- and Cycle-Dependent Crack Growth by R. K. Nalla, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 2183-2195.

• Mechanistic Aspects of Fracture and R-Curve Behavior in Human Cortical Bone by R. K. Nalla, J. J. Kruzic, J. H. Kinney, R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 217-231.

• Mechanistic Aspects of In Vitro Fatigue-Crack Growth in Dentin by J. J. Kruzic, R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomaterials, vol. 26, 2005, pp. 1195-1204.

• Fracture in Human Cortical Bone: Local Fracture Criteria and Toughening Mechanisms by R. K. Nalla, J. S. St\F6lken, J. H. Kinney, and R. O. Ritchie, Journal of Biomechanics, vol. 38, 2005, pp. 1517-1525.

• Interface Structure and Atomic Bonding Characteristics in Silicon Nitride Ceramics by A. Ziegler, J. C. Idrobo, M. K. Cinibulk, C. Kisielowski, N. D. Browning, and R. O. Ritchie, Science, vol. 306, Dec. 2004, pp. 1768-1770.

• Effect of Aging on the Toughness of Human Cortical Bone: Evaluation by R-Curves by R. K. Nalla, J. J. Kruzic, J. H. Kinney, and R. O. Ritchie, Bone, vol. 35, Dec. 2004, pp. 1240-1246.

• Characteristic Dimensions and the Micro-Mechanisms of Fracture and Fatigue in Nano and Bio Materials by R. O. Ritchie, J. J. Kruzic, C. L. Muhlstein, R. K. Nalla, and E. A. Stach, International Journal of Fracture, vol. 128, 2004.

• On the Role of Grain-Boundary Films in Optimizing the Mechanical Properties of Silicon Carbide Ceramics by R. O. Ritchie, X.-F. Zhang, and L. C. De Jonghe, in Interfacial Engineering for Optimized Properties III, MRS Symposium Proceedings, vol. 819, 2004.

• Utilizing On-Chip Testing and Electron Microscopy to Study Fatigue and Wear in Polysilicon Strcutural Films by D. H. Alsem, E.A. Stach, C.L. Muhlstein, M.T. Dugger, and R.O. Ritchie, in Nanoscale Materials and Modeling: Relations Among Processing, Microstructure, and Mechanical Properties, MRS Symp. Proc., vol. 821, 2004.

• On the Electronic and Mechanical Instabilities in Ni50.9Ti49.1 by A. Mehta, V. Imbeni, R. O. Ritchie, and T. W. Duerig, Materials Science and Engineering A, vol. 378, 2004, pp. 130-137.

• On the Origin of Toughness of Mineralized Tissue: Microcracking or Uncracked-Ligament Bridging? by R. K. Nalla, J. J. Kruzic, and R. O. Ritchie, Bone, vol. 34, May 2004, pp. 790-798.

• Constitutive Modelling and Numerical Simulation of Multivariant Phase Transformation in Superelastic Shape-Memory Alloy by Y. Jung, P. Papadopoulos, and R. O. Ritchie, International Journal of Numerical Methods in Engineering, vol. 60, May 2004, pp. 429-460.

• Carbon Nanotubes as Nanoscale Mass Conveyors by B. C. Regan, S. Aloni, R. O. Ritchie, U. Dahmen, and A. Zettl, Nature, vol. 428, April 2004, pp. 924-927.

• On the In Vitro Fatigue Behavior of Human Dentin: Effect of Mean Stress by R.K. Nalla, J.H. Kinney, S.J. Marshall and R.O. Ritchie, J. Dent. Res., 2004;  83(3):211-215

• Crack-Size Effects on Cyclic and Monotonic Crack Growth in Polycrystalline Alumina: Quantification of the Role of Grain Bridging by J. J. Kruzic, R. M. Cannon, and R. O. Ritchie, Journal of the American Ceramic Society, 87 [1] (2004), pp. 93-103.

• Effects of Plastic Constraint on the Cyclic and Static Fracture Behavior of Metal/Ceramic Layered Structures by J. J. Kruzic, J. M. McNaney, R. M. Cannon, and R. O. Ritchie, Mechanics of Materials 36 (2004), pp. 57-72.

• Fracture and Fatigue Resistance of Mo-Si-B Alloys for Ultrahigh-Temperature Structural Applications by J. J. Kruzic, J. H. Schneibel, and R. O. Ritchie, Scripta Materialia, vol. 50, 2004, pp. 459-464.

• Fatigue of Polycrystalline Silicon for Microelectromechanical Systems: Crack Growth and Stability under Resonant Loading Conditions by C. L. Muhlstein, R. T. Howe, and R. O. Ritchie, Mechanics of Materials, vol. 36, 2004, pp. 13-33

• Effects of the Amorphous Oxide Intergranular Layer Structure and Bonding on the Fracture Toughness of a High Purity Silicon Nitride A. Ziegler, C. Kisielowski, M. J. Hoffmann, and R. O. Ritchie, in Structure-Property Relationships of Oxide Surfaces and Interfaces II, MRS Symp. Proc. vol. 751, 2003.

• Nanowicks: Nanotubes as Tracks for Mass Transfer by B.C. Regan, S. Aloni, B. Huard, A. Fennimore, R.O. Ritchie and A. Zettl, AIP Conference Proceedings 685, 612 (2003)

• Probing Structural Phase Transitions of Crystalline C60 via Resistivity Measurements of Metal Film Overlayers by C. W. Chang, B. C. Regan, W. Mickelson, R. O. Ritchie, and A. Zettl, Solid State Communications, vol. 128, 2003, pp. 359-363

• Ambient to high-temperature fracture toughness and cyclic fatigue behavior in Al-containing silicon carbide ceramics by R. Yuan, J.J. Kruzic, X.F. Zhang, L.C. De Jonghe, R.O. Ritchie, Acta Materialia, 51, 2003, pp. 6477-6491

• On the fracture of human dentin- Is it stress- or strain-controlled? by R.K. Nalla, J.H. Kinney, and R.O. Ritchie, J. Biomed. Mater.Res., 2003. 67A: 484-495

• On the Mechanical Behavior of Nitinol under Multiaxial Loading Conditions and In Situ Synchrotron X-Ray Diffraction by V. Imbeni, A. Mehta, S. W. Robertson, T. W. Duerig, A. Pelton, and R. O. Ritchie, Proceedings of the Shape Memory and Superelastic Technologies Conference 2003 (SMST-2003), SMST Society, Inc., Menlo Park, CA, 2003.

• Atomic-Resolution Transmission Electron Microscopy of a Y2O3-Containing Silicon Nitride Ceramic by A. Ziegler, C. Kisielowski, M. Hoffmann, and R. O. Ritchie, Journal of the American Ceramic Society, vol. 86, 2003, pp. 1777-1785.

• Crack blunting, crack bridging and resistance-curve fracture mechanics indentin: effect of hydration by J. J. Kruzic, R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomaterials, 24 (2003), pp. 5209-5221.

• Mechanical Relaxation of Localized Residual Stresses Associated with Foreign Object Damage by B. L. Boyce, X. Chen, J. O. Peters, J. W. Hutchinson, and R. O. Ritchie, Materials Science and Engineering A, vol. 349 (1-2), 2003, pp. 48-58.

• Mo-Si-B Alloy Development by J. H. Schneibel, J. J. Kruzic, R. O. Ritchie, Proceedings of the 17th Annual Conference on Fossil Energy Materials, 2003.

• High-Cycle Fatigue of Micron-Scale Polycrystalline Silicon Films: Fracture Mechanics Analysis of the Role of the Silicon/Silica Interface by C. L. Muhlstein and R. O. Ritchie, International Journal of Fracture, vol. 119/120, 2003, pp. 449-474.

• Texture in Tubes and Plates of the Superelastic/Shape-Memory Alloy Nitinol by S. W. Robertson, V. Imbeni, E. Notkina, H.-R. Wenk, and R. O. Ritchie, Proceedings of the Shape Memory and Superelastic Technologies Conference 2003 (SMST-2003), SMST Society, Inc., Menlo Park, CA, 2003.

• Abrasive Wear Behavior of Heat-Treated ABC-Silicon Carbide by X. F. Zhang, G. Y. Lee, Da Chen, R. O. Ritchie, and L. C. De Jonghe, Journal of the American Ceramic Society, vol 86 (8), 2003, pp. 1370-1378.

• Determining the Toughness of Ceramics from Vickers Indentations using the Crack-Opening Displacements: An Experimental Study, by J. J. Kruzic and R. O. Ritchie, Journal of the American Ceramic Society, vol. 86 (8), Aug. 2003, pp. 1433-1436.

• On the Influence of Mechanical Surface Treatments -- Deep Rolling and Laser Shock Peening -- on the Fatigue Behavior of Ti-6Al-4V at Ambient and Elevated Temperatures  by R. K. Nalla, I. Altenberger, U. Noster, G. Y. Liu, and B. Scholtes, and R. O. Ritchie, Materials Science and Engineering A, vol. 355, 2003, pp. 216-230.

• Effect of Orientation on the In Vitro Fracture Toughness of Dentin: The Role of Toughening Mechanisms by R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Biomater., 2003; 24:3955-3968.

• On the In Vitro Fatigue Behavior of Human Dentin with Applications for Life Prediction by R. K. Nalla, V. Imbeni, J. H. Kinney, M. Staninec, S. J. Marshall, and R. O. Ritchie, J. Biomed. Mater. Res., 2003; 66A:10-20.

• On the In Vitro Fracture Toughness of Human Dentin by V. Imbeni, R. K. Nalla, C. Bosi, J. H. Kinney, and R. O. Ritchie, J. Biomed. Mater. Res., 2003; 66A:1-9.

• An Experimental Study of the Superelastic Effect in a Shape-Memory Nitinol Alloy under Biaxial Loading by J. M. McNaney, V. Imbeni, Y. Jung, P. Papadopoulos, and R. O. Ritchie, Mechanics of Materials, 2003.

• An In Situ Study of the Thermal Stability of Near-Surface Microstructures Induced by Deep Rolling and Laser-Shock Peening by I. Altenberger, E. A. Stach, G. Liu, R. K. Nalla, and R. O. Ritchie, Scripta Materialia, vol 48, 2003, pp. 1593-1598.

• Fracture and Fatigue Properties of Mo-Mo3Si-Mo5SiB2 Refractory Intermetallic Alloys at Ambient to Elevated Temperatures (25 C- 1300 C) by H. Choe, J. H. Schneibel, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 34A (2), Feb. 2003, pp. 225-239.

• Mechanistic Fracture Criteria for the Failure of Human Cortical Bone by R. K. Nalla, J. H. Kinney, and R. O. Ritchie, Nature Mater., 2003; 2:164-168.

• High cycle fatigue of beta-titanium alloys by J.O. Peters, G. L�tjering, R.K. Nalla, I. Altenberger, and R.O. Ritchie, in: Proc. Fatigue 2002, Stockholm, Sweden, 2002.

• Fracture and Fatigue Behavior at Ambient and Elevated Temperatures of Alumina Bonded with Copper/Niobium/Copper Interlayers by J. J. Kruzic, R. A. Marks, M. Yoshiya, A. M. Glaeser, R. M. Cannon, and R. O. Ritchie, J.Am.Cerem. Soc., 85 [10], 2002, pp. 2531-41.

• Direct Mechanical Measurement of the Tensile Strength and Elastic Modulus of Multiwalled Carbon Nanotubes by B. G. Demczyk, Y. M. Yang, J. Cumings, M. Hetman, W. Han, A. Zettl, and R. O. Ritchie, Materials Science and Engineering A, vol. A334, Sept. 2002, pp. 173-178.

• Statistical Fracture Modeling: Crack Path and Fracture Criteria with Application to Homogeneous and Functionally Graded Materials by T. L. Becker, Jr., R. M. Cannon, and R. O. Ritchie, Engineering Fracture Mechanics, vol. 69, 2002, pp. 1521-1555.

• A Reaction-Layer Mechanism for the Delayed Failure of Micron-Scale Polycrystalline Silicon Structural Films Subjected to High-Cycle Fatigue Loading by C. L. Muhlstein, E. A. Stach and R. O. Ritchie, Acta Materialia, vol. 50, 2002, pp. 3579-3595.

• Mixed-Mode High-Cycle Fatigue Crack Growth Thresholds in Ti-6Al-4V: Role of Small Cracks by R. K. Nalla, J. P. Campbell and R. O. Ritchie, International Journal of Fatigue, vol. 24, 2002, pp. 1047-62.

• On the Application of the Kitagawa-Takahashi Diagram to Foreign-Object Damage and High-Cycle Fatigue by J. O. Peters, B. L. Boyce, X. Chen, J. M. McNaney, J. W. Hutchinson, and R. O. Ritchie, Engineering Fracture Mechanics, vol 69, 2002, pp. 1425-46.

• Effects of Microstructure on Mixed-Mode, High-Cycle Fatigue Crack Growth Thresholds in Ti-6Al-4V alloy by R. K. Nalla, J. P. Campbell and R. O. Ritchie, Fatigue & Fracture of Engineering Materials & Structures, Vol. 25(6), June 2002, pp.587-606.

• Influence of Microstructure on the High-Cycle Fatigue of Ti-6Al-4V: Bimodal vs. Lamellar Structures by R. K. Nalla, B. L. Boyce, J. P. Campbell, J. O. Peters, and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 33A (3), mid-March 2002, pp. 899-918.

• Mechanism of Fatigue in Micron-Scale Films of Polycrystalline Silicon for Microelectromechanical Systems by C. L. Muhlstein, E. A. Stach and R. O. Ritchie, Applied Physics Letters, vol. 80 (9), Mar. 4, 2002, pp.1532-1534.

• A physically-based abrasive wear model for composite materials by G.Y. Lee, C.K.H. Dharan, and R.O. Ritchie. Wear, 2002 (252), pp. 322-331.

• Imaging of the Crystal Structure of Silicon Nitride at 0.8 \C5ngstr\F6m Resolution by A. Ziegler, C. Kisielowski, and R. O. Ritchie, Acta Materialia , vol. 50 (3), Feb. 2002, pp. 565-574.

• Foreign-object damage and high-cycle fatigue: role of microstructure in Ti-6Al-4V by J.O. Peters and R.O. Ritchie, International Journal of Fatigue, 23 (2001), pp. 413-421.

• Cyclic Fatigue-Crack Growth and Fracture Properties in  Ti3SiC2Ceramics at Elevated Temperatures by D. Chen, K. Shirato, M. W. Barsoum, T. El-Raghy, and R. O. Ritchie, Journal of the American Ceramic Society, vol.84 (12), Dec. 2001, pp. 2914-2920.

• Effect of load ratio and maximum stress intensity on the fatigue threshold in Ti-6Al-4V by B. L. Boyce and R. O. Ritchie. Engineering Fracture Mechanics, vol. 68, 2001, pp. 129-147.

• High-cycle fatigue of single crystal silicon thin films by C. L. Muhlstein, S. Brown, and R. O. Ritchie, JMEMS, 2001.

• Foreign object damage and high-cycle fatigue of Ti-6Al-4V by J.O. Peters and R.O. Ritchie, Materials Science & Engineering A, 2001.

• High-cycle fatigue and durability of polycrystalline silicon thin films in ambient air by C.L. Muhlstein, S.B. Brown, and R.O. Ritchie. Sensors Actuators A (Physical), 2001.

• Fatigue-Crack Growth Behavior in the Superelastic and Shape-Memory Material Nitinol by A. L. McKelvey and R. O. Ritchie, Metallurgical and Materials Transactions A, vol. 32A (3A), Mid March 2001, pp. 731-743.

• High-cycle fatigue of polycrystalline silicon thin films in laboratory air by C.L. Muhlstein, S.B. Brown, and R.O. Ritchie. MRS Symposium Proceedings, 2000.

• A comparison of the mechanisms of fatigue-crack propagation behavior in a Zr-based bulk amorphous metal in air and an aqueous chloride solution by V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Materials Science and Engineering, 2001.

• The residual stress state due to a spherical hard-body impact by B.L. Boyce, X. Chen, J.W. Hutchinson, and R.O. Ritchie. Mechanics of Materials, 2001.

• Structure of boron nitride nanotubules by B.G. Demczyk, J. Cumings, A. Zettl, and R.O. Ritchie. Applied Physics Letters, 2001.

• Finite crack kinking and T-stresses in fuctionally graded materials by T.L. Becker Jr., R.M. Cannon, and R.O. Ritchie. International Journal of Solids and Structures, 2001.

• Ambient to high temperature fracture toughness and fatigue-crack propagation behavior in a Mo-12Si-8.5B (at.%) intermetallic by H. Choe, D. Chen, J.H. Schneibel, and R.O. Ritchie. Intermetallics, 2001.

• Short and large crack, mixed-mode fatigue-crack growth thresholds in Ti-6Al-4V by R.K. Nalla, J.P. Campbell, and R.O. Ritchie. Part of HCF-6 conference papers, 2001.

• Mixed-mode, high-cycle fatigue-crack growth thresholds in Ti-6Al-4V: a comparison of large and small crack behavior by R.K. Nalla, J.P. Campbell, and R.O. Ritchie. Proc. of the sixth international conference on biaxial/multiaxial fatigue and fracture , 2001.

• Cyclic Fatigue-Crack Propagation in Sapphire in Air and Simulated Physiological Environments by B. Asoo, J. M. McNaney, Y. Mitamura, and R. O. Ritchie, Journal of Biomedical Materials Research, vol. 52, 2000, pp. 488-491.

• An approximate method for residual stress calculation in functionally graded materials by T.L.Becker Jr., R.M.Cannon, R.O.Ritchie, Mechanics of Materials 32(2000), pp. 85-97

• In situ measurement of fatigue crack growth rates in a silicon carbide ceramic at elevated temperatures using a DC potential system by D. Chen, C.J. Gilbert, and R.O. Ritchie. Journal of Testing and Evaluation, 2000.

• Effects of grain-boundary structure on the strength, toughness, and cyclic fatigue properties of a monolithic silicon carbide by D. Chen, X.F. Zhang, and R.O. Ritchie. Journal of the American Ceramic Society, 2000.

• Mixed-Mode, High-Cycle Fatigue-Crack Growth Thresholds in Ti-6Al-4V: Part II  Quantification of Crack-Tip Shielding by J. P. Campbell and R. O. Ritchie, Engineering Fracture Mechanics, vol. 67 (3), Oct. 2000, pp. 229-249.

• Mixed-Mode, High-Cycle Fatigue-Crack Growth Thresholds in Ti-6Al-4V: Part I  A Comparison of Large and Small Crack Behavior by J. P. Campbell and R. O. Ritchie, Engineering  Fracture Mechanics, vol. 67(3), Oct. 2000, pp. 209-227.

• Influence of Foreign Object Damage on Crack Initiation and Early Fatigue-Crack Growth in Ti-6Al-4V by J. O. Peters and R. O. Ritchie, Engineering Fracture Mechanics, vol. 67 (3), Oct. 2000, pp. 193-207.

• Time dependent  debonding of aluminum/alumina interfaces under cyclic and static loading   by J.J. Kruzic, J.M. McNaney, R.M. Cannon, and R.O. Ritchie. MRS Fall Meeting,  2000

• Role of the grain-boundary phase on the elevated-temperature strength, toughness, fatigue and creep resistance of silicon carbide sintered with Al, B and C by D. Chen, M.E. Sixta, X.F. Zhang, L.C. De Jonghe, and R.O. Ritchie. Acta Materialia, 2000

• Fracture and fatigue-crack growth behavior in Mo-12Si-8.5B intermetallics at ambient and elevated temperatures by H. Choe, D. Chen, J.H. Schneibel, and R.O. Ritchie. TMS Fall conference, 2000

• Mechanisms of high-temperature fatigue in silicon carbide ceramics by D. Chen, X.F. Zhang, and R.O. Ritchie. TMS Fall conference, 2000

• High-temperature cyclic fatigue-crack growth in monolithic Ti3SiC2 ceramics by K. Shirato, D. Chen, M.W. Barsoum, T. El-Ragy, and R.O. Ritchie. TMS Fall conference, 2000

• Fatigue-crack growth and fracture properties of coarse and fine-grained Ti 3 SiC 2 by C.J. Gilbert, D.R. Bloyer, M.W. Barsoum, T. El-Raghy, A.P. Tomsia and R.O. Ritchie. Scripta Materialia, 2000

• High-temperature cyclic fatigue-crack growth behavior in an in situ toughened silicon carbide by D. Chen, C.J. Gilbert, X.F. Zhang, and R.O. Ritchie. Acta Materialia, 2000

• Mechanics and mechanisms of fatigue damage and crack growth in advanced materials by R.O. Ritchie, C.J. Gilbert, and J.M. McNaney. International Journal of Solids and Structures, 2000

• Light Emission during Fracture of a Zr-Ti-Ni-Cu-Be Bulk Metallic Glass by C. J. Gilbert, J. W. Ager, III, V. Schroeder, J. P. Lloyd, J. R. Graham, and R. O. Ritchie, Applied Physics Letters, vol. 74, 1999, pp. 3809-3811.

• Mechanisms of fatigue-crack propagation in ductile and brittle solids by R.O.Ritchie, International Journal of Fracture 100, pp.55-83, 1999

• High-cycle fatigue of Ti-6Al-4V by R.O.Rtichie, D.L.Davidson, B.L.Boyce, J.P.Campbell and O.Roder, Fatigue Fract Engng Mater Struct 22, pp.621-631, 1999

• Fatigue-crack propagation behavior of ductile/brittle laminated composites by D.R. Bloyer, K.T. Venkateswara Rao, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• The effect of microstructure on fracture toughness and fatigue crack growth behavior in Gamma-Titanium Aluminide based intermetallics by J.P. Campbell, K.T. Venkateswara Rao, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• Mechanisms for fracture and fatigue-crack propagation in a bulk metallic glass by C.J. Gilbert, V. Schroder, and R.O. Ritchie. Metallurgical and Materials Transactions A, 1999

• On the fatigue behavior of gamma-based titanium aluminides: role of small cracks by J.J. Kruzic, J.P. Campbell, and R.O. Ritchie. Acta Metallurgica, 1999

• Fatigue-crack propagation in Nitinol, a shape-memory and superelastic endovascular stent material by A.L. Mckelvey, R.O. Ritchie. Biomedical Materials Research, 1999

• Effect of viscous grain bridging on cyclic fatigue-crack growth in monolithic ceramics at elevated temperatures J.M. McNaney, C.J. Gilbert, and R.O. Ritchie. Acta Metallurgica, 1999

• Effect of aqueous environment on fatigue-crack propagation behavior in a Zr-based bulk amorphous metal V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Scripta Materialia, 1999

• Thresholds for high-cycle fatigue in a turbine engine Ti-6Al-4V alloy R.O. Ritchie, B.L. Boyce, J.P. Campbell, O. Roder, A.W. Thompson, and W.W. Milligan. International Journal of Fatigue, 1999

• High frequency fatigue crack propagation behavior of a nickel-base turbine disk alloy S.A. Padula II, A. Shyam, R.O. Ritchie, and W.W. Milligan. International Journal of Fatigue, 1998

• High-temperature fracture and fatigue resistance of a ductile beta-TiNb reinforced gamma-TiAl intermetallic composite by K.T. Venkateswara Rao and R.O. Ritchie. Acta Metallurgica, 1998

• Transient fatigue-crack growth behavior following variable-amplitude loading in a monolithic silicon nitride ceramic by C.J. Gilbert and R.O. Ritchie. Engineering Fracture Mechanics, 1998

• Comparison of the corrosion behavior of a bulk amorphous metal, Zr41.2 Ti 13.8Cu12.5Ni10Be22.5 , with its crystallized form by V. Schroeder, C.J. Gilbert, and R.O. Ritchie. Scripta Materialia, 1998

• Fatigue of a Zr-Ti-Cu-Ni-Be bulk amorphous metal: stress/life and crack-growth behavior by C.J. Gilbert, J.M. Lippmann, and R.O. Ritchie. Scripta Materialia, 1998

• Fatigue-crack growth of small cracks in a directionally-solidified nickel aluminide with molybdenum additions by Moon-Hee Hong, J.M. McNaney, and R.O. Ritchie. Scripta Materialia, 1998

• On the quantification of bridging tractions during subcritical crack growth under monotonic and cyclic fatigue loading in a grain-bridging silicon carbide ceramic by C.J. Gilbert and R.O. Ritchie. Acta metallurgica, 1998.

• On the anomalous temperature dependence of fatigue-crack growth in gamma-based titanium aluminides by A.L. McKelvey, K.T. Venkateswara Rao, and R.O. Ritchie. Scripta Materialia, 1997.

• On the growth of small fatigue cracks in gamma-based titanium aluminides by J.P. Campbell, J.J. Kruzic, S. Lillibridge, K.T. Venkateswara Rao, and R.O. Ritchie. Scripta Materialia, 1997.

• On the role of microstructure in fatigue-crack growth of gamma-based titanium aluminides by J.P. Campbell, K.T. Venkateswara Rao, and R.O. Ritchie. Materials Science and Engineering, 1997.

• Laminated Nb/Nb3Al composites: effect of layer thickness on fatigue and fracture behavior by D.R. Bloyer, K.T. Venkateswara Rao, and R.O. Ritchie. Materials Science and Engineering, 1997.

• Fatigue crack growth resistance in SiC particulate and whisker reinforced P/M 2124 aluminum matrix composites by J.J. Mason and R.O. Ritchie. Materials Science and Engineering, 1997.

• Limitations on the use of the mixed-mode delaminating beam test specimen: Effects of the size of the region of K-dominance by T.L. Becker, J.M. McNaney, R.M. Cannon and R.O. Ritchie. Mechanics of Materials, 1997.

• Microstructural mechanisms of cyclic fatigue-crack propagation in grain-bridging ceramics by C.J. Gilbert, R.H. Dauskardt, and R.O. Ritchie. Ceramics International, 1997

• Fracture Toughness and Fatigue-Crack Propagation in a Zr-Ti-Ni-Cu-Be Bulk Metallic Glass by C. J. Gilbert, R. O. Ritchie, and W. L. Johnson, Applied Physics Letters, vol. 71, 1997, pp. 476-478

• Resistance-curve toughening in ductile/brittle layered structures: behavior in Nb/Nb 3 Al laminates by D.R. Bloyer, K.T. Venkateswara Rao, R.O. Ritchie, Materials Science and Engineering, 1996

• Phase transformation in an in situ Nb-reinforced Nb3Al intermetallic composite by C.D. Bencher, L. Murgesh, K.T.T. Rao, and R.O. Ritchie. Intermetalics, 1996

• Fatigue and Fracture of Pyrolytic Carbon: A Damage-Tolerant Approach to Structural Integrity and Life Prediction in "Ceramic" Heart Valve Prostheses by R.O. Ritchie, Journal of Heart Valve Disease, Vol. 5. Suppl. I, 1996.

• Fatigue-crack growth and fracture resistance of a two-phase TiAl alloy in duplex and lamella microstructures by K.T. Venkateswara Rao, Y.W. Kim, C.L. Muhlstein, R.O. Ritchie, Materials Science and Engineering, 1995.
  
  
• Fracture of Synthetic Diamond by M. D. Drory, R. H. Dauskardt, A. Kant, and R. O. Ritchie, Journal of Applied Physics, vol. 78, 1995, pp.3083-3088.
  
  
• Powder processing of ductile-phase-toughened Nb-Nb3Al in situ composites by L. Murugesh, K.T. Venkateswara Rao, R.O. Ritchie, Materials Science and Engineering, 1994.
  
  
• On the Interpretation of the Fractal Character of Fracture Surfaces by R. H. Dauskardt, F. Haubensak, and R. O. Ritchie, Acta Metallurgica et Materialia, vol. 38 (2), Feb. 1990, pp. 143-159.
  
  
• Cryogenic Toughness of Commercial Aluminum-Lithium Alloys:  Role of Delamination Toughening by K. T. Venkateswara, W. Yu, and R. O. Ritchie, Metallurgical Transactions A, vol. 20A (3), March. 1989, pp. 485-497.
  
  
• Mechanisms of Fatigue Crack Propagation in Metals, Ceramics and Composites: Role of Crack-Tip Shielding by R. O. Ritchie, Materials Science and Engineering: A, vol. 103, 1988, pp. 15-28. (doi: 10.1016/0025-5416(88)90547-2)
  
  
• Small Fatigue Cracks: A Statement of the Problem and Potential Solutions by R. O. Ritchie and J. Lankford, Materials Science and Engineering, vol. 84, 1986, pp. 11-16. (doi: 10.1016/0025-5416(86)90217-X)
  
  
• On Macroscopic and Microscopic Analyses for Crack Initiation and Crack Growth Toughness in Ductile Alloys by R. O. Ritchie and A. W. Thomson, Metallurgical Transactions A, vol. 16A, 1985, pp. 233-248. (doi: 10.1007/BF02815305)
  
  
• Fatigue Crack Propagation Thresholds for Long and Short Cracks in René 95 Nickel-Base Superalloy by J. F. McCarver and R. O. Ritchie, Materials Science and Engineering, vol. 55 (1), Aug. 1982, pp. 63-67. (doi: 10.1016/0025-5416(82)90084-2)
  
  
• A Geometrical Model for Fatigue Crack Closure Induced by Fracture Surface Roughness by S. Suresh and R. O. Ritchie, Metallurgical Transactions A, vol. 13A (9), Sept. 1982, pp. 1627-1631. (doi: 10.1007/BF02644803)
  
  
• Critical Fracture Stress and Fracture Strain Models for the Prediction of Lower and Upper Shelf Toughness in Nuclear Pressure Vessel Steels by R. O. Ritchie, W. L. Server, and R. A. Wullaert, Metallurgical Transactions A, vol. 10A (10), Oct. 1979, pp. 1557-1570. (doi: 10.1007/BF02812022)
  
  
• On the Relationship between Critical Tensile Stress and Fracture Toughness in Mild Steel by R. O. Ritchie, J. F. Knott, and J. R. Rice, Journal of Mechanics and Physics in Solids, vol. 21 (6), June 1973, pp. 395-410. (doi: 10.1016/0022-5096(73)90008-2)