Proceedings of the First Japan-U.S. Workshop on Testing, Modeling, and Simulation, held in Boston, Massachusetts, June 27-29, 2003. Sponsored by Soil Properties and Modeling Committee of the Geo-Institute of ASCE; Japanese Geotechnical Society; JSSMFE; Japan Society for Promotion of Science; National Science Foundation; in cooperation with International Society of Soil Mechanics and Geotechnical Engineering.

This Geotechnical Special Publication contains 41 papers gathering the most state-of-the-art geomechanics research conducted by investigators from the United States and Japan. The papers in this volume present new data, methods, and facilities on a variety of topics in the areas of testing, modeling, and numerical simulations in geomechanics.  An appendix of discussion notes, which were recorded upon the papers' presentation, is included.

Topics include:

• time effects;
• stress-strain behavior and cyclic loading residual strains;
• anisotropy and fabric bonding;
• shear banding and postpeak stress-strain behavior;
• liquefaction;
• effects of particle size, gradation, and particle breakage;
• new testing equipment and systems; and
• innovative computational methods.

GSP 143 will be beneficial to those with an interest in the current trends and research topics in geomechanics in the United States and Japan.