Towards improving the 2D-MITC4 element for analysis of plane stress and strain problems

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In this paper, we improve the performance of the 2D-MITC4 element for analysis of plane stress and plane strain problems. While the element shows excellent convergence behavior in regular meshes, it exhibits accuracy loss in distorted meshes, as many other elements do. We focus on improving performance in distorted meshes for general use in engineering practice. We simplify the assumed strain field of the original 2D-MITC4 element and introduce the geometry dependent Gauss integration scheme, in which integration points vary according to element geometry distortion. Consequently, a new 2D-MITC4 element is developed. The new 2D-MITC4 element passes the basic tests: patch, zero energy mode, and isotropy tests. Through various numerical examples, improved convergence behaviors of the new element are demonstrated, especially in distorted meshes.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2023-01
Language
English
Article Type
Article
Citation

COMPUTERS & STRUCTURES, v.275

ISSN
0045-7949
DOI
10.1016/j.compstruc.2022.106933
URI
http://hdl.handle.net/10203/304176
Appears in Collection
ME-Journal Papers(저널논문)
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