Adjunct Professor of Earth & Planetary Sciences, Emeritus Walter P. Murphy Professor of Materials Science and Engineering
I have been working on theories of fracture and of fatigue. My latest effort in this field has been the creation of the non-redundant dislocation density field method of solving problems involving cracks in elastic plastic solids. With this method, previously intractable crack problems have been solved.
Asymptotic crack tip stress, rotation pseudo-stress field and dislocation fields for mixed mode I and II cracks in elastic perfectly plastic solids, Mechanics of Materials. 35, pp. 433-452 (2003).
Relationship between stress_strain potentials and maximum shear and zero shear trajectories for mode III crack, in Electron Microscopy: its Role in Materials Science (The Mike Meshii Symposium), edited by J.R. Weertman, M. Fine, K. Faber, D. Quesnel, W. King and P. Liaw, The Minerals, Metals & Materials Society (TMS), Warrendale, PA, pp. 107-112 (2003).
Subsonic type earthquake dislocation moving at approximately × shear wave velocity on interface between half spaces of slightly different elastic constants, Geophysical Research Letters, 29, (10), pp. 109-1 to 109-4 (2002).
Effective dislocation free zone and effective stress intensity factor revisited for mode III crack, in Mechanisms & Mechanics of Fracture, The John Knott Symposium, edited by W. O. Soboyejo, J. J. Lewandowski and R. O. Ritchie, The Minerals, Metals & Materials Society (TMS), Warrendale, PA, pp. 31-36, (2002).
The Comninou-Dundurs Effect and position stability of subglacial lakes, Annals of Glaciology. 35, pp. 495-502 (2002).