A composite mixed finite element model for the elasto-plastic analysis of 3D structural problems

Bilotta Antonio; Garcea Giovanni; Leonetti Leonardo

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A composite mixed finite element model for the elasto-plastic analysis of 3D structural problems

机译：A composite mixed finite element model for the elasto-plastic analysis of 3D structural problems

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摘要

The paper proposes a 3D mixed finite element and tests its performance in elasto-plastic and limit analysis problems. A composite tetrahedron mesh is assumed over the domain. Within each element the displacement field is described by a quadratic interpolation, while the stress field is represented by a piece-wise constant description by introducing a subdivision of the element into four tetrahedral regions. The assumptions for the unknown fields make the element computationally efficient and simple to implement also in existing codes. The limit and elasto-plastic analyses are formulated as a unified mathematical programming problem allowing the use of Interior Point like algorithms. A series of numerical experiments shows that the proposed finite element is locking free and has a good plastic behavior. (C) 2016 Elsevier B.V. All rights reserved.

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来源
《Finite elements in analysis & design》 |2016年第6期|43-53|共11页
作者
Bilotta Antonio; Garcea Giovanni; Leonetti Leonardo;
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作者单位

Univ Calabria, Dipartimento Ingn Informat Modellist Elettron & S, I-87036 Cosenza, Italy;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类应用数学;
关键词
Mixed finite element; 3D structural problems; Plastic collapse analysis; Elastoplasticity; Conic programming;

A composite mixed finite element model for the elasto-plastic analysis of 3D structural problems

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