GENERNAL AND EFFICIENT ALGORITHM OF STRUCTURAL SYSTEM WITH LOCAL NONLINEARITY

Elastoplastic contact problems and elastoplastic problems with two or more plastic zones are often encountered in engineering analysis. A new algorithm combining substituting technique with Positive-Negative Sequence Modification Method with prescribed displacements was proposed in this paper. The concept of this algorithm is clear, the design of its program is easy and the efficiency of solving problems is improved considerably. Examples are given to verify its effectiveness.