elastoplasticity;
variational inequality;
a posteriori error estimate;
plasticity with hardening;
viscoplasticity;
primal problem;
dual problem;
reliability;
finite element method;
averaging estimator;
D O I:
10.1016/S0045-7825(02)00648-5
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
Averaging techniques are popular tools in adaptive finite element methods for numerical simulation in continuum mechanics since they provide efficient a posteriori error control. In this paper, the reliability of any averaging estimator is shown for low order finite element methods in one time-step of elastoplasticity with hardening. The constants and higher-order terms are effected by the hardening and the smoothness of given right-hand sides, but are independent of the structure of a shape-regular mesh. Since it involves a different functional analytical framework, the case of perfect plasticity is excluded from this paper. (C) 2002 Elsevier Science B.V. All rights reserved.