关键词: 铸造铝合金 CXXX；断裂失效；GISSMO 损伤失效；参数反求方法

Abstract: Numerical parametric inverse analysis method is used to obtain the GISSMO damage failure parameters of cast aluminum alloy CXXX. From the quasi-static uniaxial tensile test, the stress-strain curve of the CXXX material is obtained and the hardening curve is extrapolated by using the SHS criterion. Then the quasi-static tests under six different stress states, namely, shear, uniaxial tensile, center hole, notch, three-point bending, and cupping, are carried out, and the numerical inverse of the simulation combined with the test in LS-OPT is used to obtain the GISSMO failure parameters. From the test, it can be seen that the cast aluminum alloy CXXX performance is not the same as steel and other ductile materials, the most notable feature is that the cast aluminum material in the necking before fracture failure, which makes the casting material CXXX GISSMO material failure develop- ment more concise and convenient. The cast aluminum alloy CXXX material failure development method can provide a reference for similar cast aluminum material engineering applications.

Key words: Cast aluminum alloy CXXX; Fracture failure; GISSMO damage failure; Parametric inverse method