EVALUATION OF MECHANICAL PROPERTIES OF DUCTILE FILMS ON BRITTLE SUBSTRATES BASED ON THE REPRESENTATIVE STRAIN

摘要：

A new approach to extract the mechanical properties of ductile thin films on brittle substrates based on the representative strain (corresponding to the representative stress) has been presented in depthsensing indentation with finite element method (FEM).Forward and reverse analyses of high deformation symmetry numerical simulation of Berkovich indentation tests are used to determine mechanical properties of ductile films.The proposed reverse analysis provides a new solution for the initial yield stress (or the representative stress) and the strain-hardening exponent,given that the Youngs modulus is predetermined from the Sakai method,e.g.,as1.The validity of the reverse analysis method is checked using the numerical nano-indentation test.

关键词： ductile/brittle substrates representative strain finite element method (FEM) forward/reverse analysis

作者: H.P.Hu Y.G.Liao C.Q.Guo L.M.Jiang Y.C.Zhou X.J.Zheng

作者单位: Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,Xian School of Mathematics and Physics,University of South China,Hengyang,Hunan 421001,China College of Packing & Printing,Hunan University of Technology,Zhuzhou,Hunan 412007,China Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education,Xian

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 282-285

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）