An unsymmetric 8-node plane element immune to mesh distortion for linear isotropic hardening material

被引：4
|
作者：
Chen, Xiaotian [1 ]
Chen, Wei [1 ]
Xu, Jiangping [1 ]
Tu, Wenbin [1 ]
Rajendran, Sellakkutti [2 ]
Lu, Jinzhong [1 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, 301 Xuefu Rd, Zhenjiang, Jiangsu, Peoples R China
[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Nanyang Ave, Singapore 639798, Singapore
来源：
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING | 2021年 / 122卷 / 20期
基金：
中国国家自然科学基金;
关键词：
large deformation; material nonlinearity; mesh distortion; unsymmetric finite element; updated Lagrangian; MATERIAL POINT METHOD; FINITE-ELEMENTS; MEMBRANE ELEMENT; DRILLING DOFS; QUAD4; ELEMENT; PERFORMANCE; 4-NODE; ACCURACY; PARTITION;
D O I：
10.1002/nme.6763
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
An 8-node quadrilateral plane element US-QUAD8 is developed for linear isotropic hardening material in the framework of updated Lagrangian unsymmetric finite formulation where BL matrix is constructed by classical shape function, and BR matrix by the higher-order Lagrangian basis function in global coordinate system. The present element eliminates the influence of Jacobian in the elemental stiffness matrix and guarantees the quadratic completeness of displacement field even under severe distorted mesh. Two typical problems meshed with angular/curved-edge/mid-side distorted elements demonstrate excellent performance of distortion resistance of the present element and good computational efficiency in severe mesh distortion.
引用
收藏
页码：5540 / 5557
页数：18
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