Constitutive description of casting aluminum alloy based on cylindrical void-cell model
(1.重庆市重庆大学资源与环境科学学院
2.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China
3.Department of Civil Engineering and Mechanics, Sichuan University, Chengdu 610065, China)
2.Department of Engineering Mechanics, Chongqing University, Chongqing 400044, China
3.Department of Civil Engineering and Mechanics, Sichuan University, Chengdu 610065, China)
Abstract: Casting aluminum alloys are highly heterogeneous materials with different types of voids that affect the mechanical properties of the material. Through the analysis of a cylindrical void-cell model the evolution equation of the voids was obtained. The evolution equation was embedded into a nonclassical elastoplastic constitutive relation, and an elastoplastic constitutive relation involving void evolution was obtained. A corresponding finite element procedure was developed and applied to the analyses of the distributions of the axial stress and porosity of notched cylindrical specimens of casting aluminum alloy A101. The computed results show good agreement with experimental data.
Key words: aluminum alloy; cylindrical void; void evolution; elastoplasticity