有限元中弹塑性问题中应变能是如何计算的？

hustlai

如题。最近遇到一个问题，是关于应变能计算的，教科书上给出的应变能计算公式是应力对应变增量做积分。我想请教一下，在有限元实现中这一过程究竟是怎样实现的。

tonnyw

Here stress is the function of strain and the constitutive law is also the function of strain. What you need to do is to divide the strain increments into many segments and over each segment you can assume the stress constant. After taking summation, you can get the strain energy.