Logarithmic strain measure applied to the nonlinear positional formulation for space truss analysis

被引：16
|
作者：
Greco, Marcelo [1 ]
Ferreira, Ivone Passos [1 ]
机构：
[1] Minas Gerais Fed Ctr Technol Educ, Dept Civil Engn, BR-30510000 Belo Horizonte, MG, Brazil
来源：
FINITE ELEMENTS IN ANALYSIS AND DESIGN | 2009年 / 45卷 / 10期
关键词：
Nonlinear analysis; Geometric nonlinearity; Logarithmic strain; FINITE-ELEMENT-ANALYSIS; TENSEGRITY STRUCTURE; SHELLS;
D O I：
10.1016/j.finel.2009.05.005
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
The logarithmic strain measure is used to obtain a consistent geometric nonlinear finite element formulation to deal with large strains on space trusses. The formulation is based on the positional formulation and no local system of coordinates on the elements is needed to describe its kinematics. Three numerical examples are presented, including a tensegrity tower and a double layer elastoplastic space truss. The paper proves that the positional nonlinear formulation is valid for other objective strain measures used in the classical nonlinear formulations, i.e. logarithmic strain measure. (c) 2009 Elsevier B.V. All rights reserved.
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页码：632 / 639
页数：8
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