Transient dynamic elastoplastic analysis by the time-domain BEM formulation

This paper presents a rime-domain BEM formulation applied to the solution o f transient dynamic elastoplastic problems. The initial stress approach is adopted to solve the elastoplastic problem. Linear time variation is assume d for the displacements and initial stress components whereas traction comp onents are assumed to have a constant time variation. Boundary discretizati on employs linear elements and the part of the domain where plastic deforma tion is expected to occur is discretized by employing linear triangular cel ls. Time integrals are computed analytically, boundary integrals are comput ed numerically and the domain integrals are computed by following a semi-an alytical procedure. A numerical example is presented and the results are co mpared with another BEM formulation. (C) 1999 Elsevier Science Ltd. All rig hts reserved.