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.

引用

页码：181 / 200

页数：20

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