Accurate solution of traction free boundaries using hybrid stress membrane elements with drilling degrees of freedom

被引：10

作者：

Groenwold, AA ^{[1
]}

Xiao, QZ

Theron, NJ

机构：

[1] Univ Pretoria, Dept Mech & Aeronaut Engn, ZA-0002 Pretoria, South Africa

[2] Univ Wales Coll Cardiff, Div Civil Engn, Cardiff CF24 0YF, S Glam, Wales

来源：

COMPUTERS & STRUCTURES | 2004年 / 82卷 / 23-26期

关键词：

traction free; finite element; assumed stress; drilling degrees of freedom;

D O I：

10.1016/j.compstruc.2003.10.030

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Methodologies for the accurate solution of traction free sides using hybrid stress membrane elements with drilling degrees of freedom are presented. Firstly, a method based on direct enforcement of the traction free condition through manipulation of the elemental assumed stress field is presented. Secondly, a penalty-equilibrated approach, in which stress equilibrium is enforced in individual elements, is presented. In the second approach, weak enforcement of equilibrium is proposed, in which the stress derivatives are modified as to alleviate locking-like behavior. (C) 2004 Civil-Comp Ltd. and Elsevier Ltd. All rights reserved.

引用

页码：2071 / 2081

页数：11

共 27 条

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