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论文类型：期刊论文

发表时间：2016-02-01

发表刊物：CMES-COMPUTER MODELING IN ENGINEERING & SCIENCES

收录刊物：SCIE、EI

卷号：111

期号：6

页面范围：473-492

ISSN号：1526-1492

关键字：couple stress theory; triangular quasi-conforming element; enhanced patch test; scale effect

摘要：The basic idea of quasi-conforming method is that the strain-dis- placement equations are weakened as well as the equilibrium equations. In this paper, an 18-DOF triangular element for couple stress theory is proposed within the framework of quasi-conforming technique. The formulation starts from truncated Taylor expansion of strains and appropriate interpolation functions are chosen to calculate strain integration. This element satisfies C-0 continuity with second order accuracy and weak C-1 continuity simultaneously. Numerical examples demonstrate that the proposed model can pass the C0-1 patch test and has high accuracy. The element does not exhibit extra zero energy modes and can capture the scale effects of microstructure.