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A novel four-node quadrilateral element with continuous nodal stress

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  • 1. State Key Lab of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, P. R. China;
    2. Centre for Advanced Materials Joining and Computations (AMJC), School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, P. R. China;
    3. Centre for Advanced Computations in Engineering Science (ACES), Department of Mechanical Engineering, National University of Singapore, 117576, Singapore

Received date: 2009-03-13

  Revised date: 2009-09-07

  Online published: 2009-12-01

Abstract

Formulation and numerical evaluation of a novel four-node quadrilateral element with continuous nodal stress (Q4-CNS) are presented. Q4-CNS can be regarded as an improved hybrid FE-meshless four-node quadrilateral element (FE-LSPIM QUAD4), which is a hybrid FE-meshless method. Derivatives of Q4-CNS are continuous at nodes, so the continuous nodal stress can be obtained without any smoothing operation. It is found that, compared with the standard four-node quadrilateral element (QUAD4), Q4-CNS can achieve significantly better accuracy and higher convergence rate. It is also found that Q4-CNS exhibits high tolerance to mesh distortion. Moreover, since derivatives of Q4-CNS shape functions are continuous at nodes, Q4-CNS is potentially useful for the problem of bending plate and shell models.

Cite this article

TANG Xu-Hai;ZHENG Chao;WU Sheng-Chuan;ZHANG Jian-Hai . A novel four-node quadrilateral element with continuous nodal stress[J]. Applied Mathematics and Mechanics, 2009 , 30(12) : 1519 . DOI: 10.1007/s10483-009-1204-1

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