Nonlinear stress analysis (a branch of solid mechanics) is an essential feature in the design of such diverse structures as aircraft, bridges, machines, and dams. This book describes the numerical implementation of boundary element methods for nonlinear analysis in solid mechanics, in two and three dimensions. Sufficient background information on nonlinear mechanics and boundary element techniques is provided to enable the reader to understand the method. In addition, the authors have developed state-of-the-art BEM source code, available for the first time on a CD-ROM included with the book.