Nonclassical constitutive model involving void evolution of casting magnesium alloy
The void evolution equation and the elastoplastic constitutive model of casting magnesium alloy were investigated.The void evolution equation consists of the void growth and the void nucleation equations.The void growth equation was obtained based on the continuous supposition of the material matrix,and the void nucleation equation was derived by assuming that the void nucleation follows a normal distribution.A softening function related to the void evolution was given.After the softening function was embedded to a nonclassical elastoplastic constitutive equation,a constitutive model involving void evolution was obtained.The numerical algorithm and the finite element procedure related to the constitutive model were developed and applied to the analysis of the distributions of the stress and the porosity of the notched cylindrical specimens of casting magnesium alloy ZL305.The computed results show satisfactory agreement with the experimental data.
casting magnesium alloy void volume fraction void evolution equation constitutive model elastoplasticity
CHEN Bin PENG Xiang-he FAN Jing-hong SUN Shi-tao
College of Resource and Environment Science,Chongqing University,Chongqing 400044,China
国际会议
2007年国际有色金属大会(International Conference of Nonfereous Materials 2007)(ICNFM)
长沙
英文
2007-11-28（万方平台首次上网日期，不代表论文的发表时间）