A 4-node quasi-conforming quadrilateral element for couple stress theory immune to distorted mesh
A 4-node quasi-conforming quadrilateral element for couple stress theory immune to distorted mesh
复制标题
不受扭曲网格影响的耦合应力理论的 4 节点准一致四边形单元
DOI:
10.1016/j.compstruc.2016.06.010
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发表时间:
2016-10
影响因子:
4.7
通讯作者:
Hu, Ping
中科院分区:
文献类型:
--
作者:
Wang, Changsheng;Zhang, Xiangkui;Hu, Ping
In this paper, a 4-node quadrilateral quasi-conforming element for couple stress theory is proposed. The formulation starts from truncated Taylor expansion of stresses, then the stress-function matrix is treated as weighted function to weaken the strain-displacement equations. Finally the string-net functions are introduced to calculate strain integration and the stress smooth technique is adopted to improve the stress accuracy of the element. Numerical results show that the proposed new model can pass the C 0-1 patch test and possesses excellent precision even when the element shape degenerates into triangle or concave quadrangle, which can capture the scale effects of microstructure.
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