A FINITE-ELEMENT WITH A UNIDIRECTIONALLY ENRICHED STRAIN FIELD FOR LOCALIZATION ANALYSIS

被引：24
|
作者：
FISH, J [1 ]
BELYTSCHKO, T [1 ]
机构：
[1] NORTHWESTERN UNIV, DEPT CIVIL ENGN, EVANSTON, IL 60208 USA
来源：
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING | 1990年 / 78卷 / 02期
关键词：
D O I：
10.1016/0045-7825(90)90100-Z
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A methodology is developed for solving problems involving the interaction between micro-scale phenomena, such as localization, and the overall macroscopic behavior of a structure. This is accomplished by enriching the strain field in a single direction within the framework of a Hu-Washizu variational principle. Results are obtained for a viscoplastic bar which is stretched beyond its bifurcation point. The results show that the shear bands in viscplastic solids have a cusped structure, which is accurately resolved by enriching this method. © 1990.
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页码：181 / 200
页数：20
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