Solving-method of elastic-plastic FEM considering the material''''s strain-softening
  Revised:February 28, 2002
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KeyWord:strain-softening,non-linear FEM,initial stiffness scheme
Zhao Qilin *1  2  Wang Jingquan 2  Sun Baojun 1
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      Because all existing accelerated initial stiffness schemes of the non linear FEM considering material's strain\|softening can not make sure of the convergence of iteration , based on the idea of secant stiffness method, a new accele rated initial stiffness scheme is put forward in this paper. It can be proved that the new method not only accelerates the iteration , but also assures the convergence of iteration even if the material's strain-softening is took into account.