MICROPOLAR CONTINUUM MODELING OF 2-D PERIODIC CELLULAR SOLIDS AND A FAST MAPPING ALGORITHM FOR MICRO-STRESS

摘要：

Micropolar equivalent continuum model is established in this paper to capture the non-local properties of cellular materials and to explain the size effects and boundary layer effects.We present a new united approach to formulate the equivalent micropolar constitutive relation of 2-D periodic cellular solids.The solutions from the classical Cauchy-type continuum and three kinds of micropolar continua are compared with the exact discrete simulations of same structures.Based on the numerical simulation,micropolar continuum can give much better agreement than those from Cauchy-type continuum,especially around regions with loading applied and near boundary layer of structures.At last,a fast mapping algorithm for detailed micro-stress distribution in components of cellular materials is developed based on the results from micropolar continuum representation.

关键词： Cellular Material Micropolar continuum, Size effect multiscale

作者: B.Niu J.Yan G.D.Cheng

作者单位: State Key Lab.of Structural Analysis for Industrial Equipment Department of Engineering Mechanics,Dalian University of Technology,Daiian 116024,P.R.China

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 280-284

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）