In general, internal cells are necessaryto solve elastoplastic problems using a conventionalboundary element method. In that method, however, themerit of BEM, which is easy preparation of data, is lost.The conventional multiple-reciprocity boundaryelement method cannot solve the elastoplastic problem,because the distribution of initial strain or initialstress cannot be determined analytically. In this paperwe show that two-dimensional elastoplastic problemscan be solved without using internal cells, using theimproved multiple-reciprocity boundary element method.An initial strain formulation is adopted and thedistribution of initial strain is interpolated usingboundary integral equations. A new computer program wasdeveloped and applied to several problems.
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