摘要
采用数值参数反分析方法得到铸造铝合金CXXX的GISSMO损伤失效参数。由准静态单轴拉伸试验,得到CXXX材料的应力应变曲线,并采用SHS准则对硬化曲线进行外推。然后开展剪切、单轴拉伸、中心孔、缺口、三点弯曲、杯突六种不同应力状态下的准静态试验,并采用LS-OPT中仿真结合试验的数值反求得到GISSMO失效参数。由试验可知,铸造铝合金CXXX表现与钢材等延性材料不一样,最显著的特点就是铸铝材料在颈缩前断裂失效,这使铸造材料CXXX的GISSMO材料失效开发更简洁方便。铸造铝合金CXXX材料失效开发方法可为相近的铸铝材料工程应用提供参考。
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.
作者
王建哲
刘向征
喻赛
WANG Jianzhe;LIU Xiangzheng;YU Sai(Automotive Engineering Research Institute,Guangzhou Automobile Group Company Limited,Guangzhou 510000,China)
出处
《汽车实用技术》
2024年第2期144-148,共5页
Automobile Applied Technology
作者简介
王建哲(1987-),男,硕士,工程师,研究方向为车身结构强度耐久分析优化,E-mail:wangjianzhe@gacrnd.com。
