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The numerical integration of the rate equation of an elastic–plastic material is considered. Special attention is focused on the discretization via the fully implicit backward Euler method in the small strain case with linear elasticity and the yield function a general quadratic in stress space. Here the calculation of the plastic (Lagrange) multiplier reduces to the computation of the smallest positive root of a polynomial in one variable. Explicit formulae are given for some special cases. 相似文献
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Thomas Herrmannsdoerfer Eckhard Krotscheck 《Journal of Low Temperature Physics》2007,147(5-6):667-436
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A. Bussmann-Holder 《Journal of Superconductivity and Novel Magnetism》2002,15(5):317-317
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