摘要
基于Gissmo损伤失效模型,采用数值参数反方法得到车用6082铝合金材料的失效参数,并设计铝合金防撞梁准静态三点弯曲试验验证6082铝合金Gissmo损伤失效模型的合理性。通过准静态单轴拉伸试验,得到6082材料的硬化曲线,并采用Swift-Hockett-Sherby(SHS)准则对硬化曲线进行外推;开展不同应力状态下的准静态试验(剪切、单轴拉伸、中心孔、缺口、三点弯曲、杯突),并采用仿真结合试验的数值反求得到Gissmo失效参数;设计6082铝合金防撞梁的准静态三点弯曲试验,验证6082材料失效参数的合理性。结果表明,本研究中提出的参数反求得到的6082铝合金Gissmo损伤失效模型(含硬化曲线、失效应变曲线、失稳曲线、单元尺寸正则化曲线)可以较好地预测防撞梁材料的失效行为。
Based on the Gissmo damage failure model,the failure parameters of 6082 automotive aluminum alloy profile were obtained by numerical parameter inverse method.The reasonability of the Gissmo damage failure model of 6082 aluminum alloy was verified by the quasi-static three-point bending test of the aluminum alloy impact beam.Firstly,the hardening curve of the 6082 material was obtained by quasi-static uniaxial tensile test,and the curve was extrapolated by Swift-Hockett-Sherby(SHS)law.Secondly,quasi-static tests(shear,uniaxial,central hole,notch,three-point bending,cupping)under various stress states were carried out,and Gissmo failure parameters were obtained by numerical inversion of test combined with simulation.Finally,the quasi-static three-point bending test of 6082 aluminum alloy impact beam was designed to verify the reasonability of Gissmo model.The test result shows that the Gissmo damage failure model of 6082 aluminum alloy proposed in this research,including hardening curve,failure strain curve,instability curve and mesh-size regulation curve,can predict the failure behavior of 6082 impact beam.
作者
刘向征
王建哲
喻赛
李文炎
梁天开
Liu Xiangzheng;Wang Jianzhe;Yu Sai;Li Wenyan;Liang Tiankai(Automotive Engineering Institute,Guangzhou Automobile Group Co.,Ltd.,Guangzhou,51000)
出处
《汽车工艺与材料》
2024年第2期52-58,共7页
Automobile Technology & Material
