Publisher : The Korean Society of Mechanical Engineers
DOI : 10.22634/KSME-A.19126.96.36.1997
Title & Authors
Adaptive Analysis Methods for the Accuracy Control of Finite Element Solutions Oh, H.S; Lee, D.I; Choi, J.H; Lim, J.K;
In adaptive finite element analysis, r- and h-methods are generally used on the basis of a discretization error estimator. In this paper, an rh-method is proposed as a new adaptive method which can improve the adaptivity performance by using both of them. This suggested rh-method moves nodal coordinates of initially given model to adjust element discretization errors and thereafter performes the h-method tdo obtain the specified accuracy of finite element solutions. Numerical experiments for various plane problems were performed using 4-noded isoparametric quadrilateral elements. As a result, the rh-method has been shown to be an accurate and efficient adaptive analysis method to obtain as improved solution.
Adaptive Finite Element Analysis;Discretization Error;Stress Error Norm;h-Method;r-Method;rh-Method;