期刊
FINITE ELEMENTS IN ANALYSIS AND DESIGN
卷 42, 期 12, 页码 1079-1086出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.finel.2006.04.007
关键词
nonlinear analysis; FEM; space trusses
This paper presents a new geometric nonlinear formulation for static problems involving space trusses. Based on the finite element method (FEM), the proposed formulation uses nodal positions rather than nodal displacements to describe the problem. The strain is determined directly from the proposed position concept, using a Cartesian coordinate system fixed in space. Bilinear constitutive hardening relations are considered here to model the elastoplastic effects, but any other constitutive model can be used. The proposed formulation is simple and yields good results, as shown in the example section. Four examples are presented here to validate the formulation. (c) 2006 Elsevier B.V. All rights reserved.
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