A novel high-performance mixed membrane finite element for the analysis of inelastic structures
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- 作者：Nicola A. Nodargi ; nodargi@ing.uniroma2.it ; Paolo Bisegna
- 关键词：Quadrilateral elements ; Mixed formulation ; Material nonlinearity ; Discontinuous interpolation ; Element state determination
- 刊名：Computers & Structures
- 出版年：2017
- 出版时间：1 April 2017
- 年：2017
- 卷：182
- 期：Complete
- 页码：337-353
- 全文大小：1225 K
- 卷排序：182
文摘
The analysis of inelastic structures is addressed through a unified Hu-Washizu type formulation. A novel high-performance eight-node quadrilateral mixed finite element is proposed. Strain interpolation is assumed to be discontinuous, piecewise-constant over suitable element subdomains. A robust and efficient iterative algorithm is used for the element state determination. Mixed formulation stability is successfully assessed by a reliable numerical test.