汽车用先进高强钢韧性断裂模型的研究与应用进展

韧性断裂预测对汽车轻量化产品设计与成形工艺优化有着重要的意义.全面综述了强耦合型与弱(非)耦合型韧性断裂模型的发展与研究现状;重点围绕考虑加载路径与应力状态的断裂失效与成形极限曲线预测、各向异性耦合的失效模型拓展、应变速率与温度效应对材料断裂的影响等3个方面的研究现状及应用效果进行了分析介绍,其中,MMC模型、Lou-...

Research and application progress on ductile fracture model of advanced high-strength steel(AHSS)for automotive

The prediction of ductile fracture has great significance to the lightweight design of automotive products and the optimization of forming processes.Therefore,the development and research status for strong coupling and weak(non)coupling ductile fracture models was comprehensively reviewed,and the research status and application effects of the three aspects including the prediction on fracture failure and forming limit curve considering loading path and stress state,the extension of failure model with anisotropic coupling,the influences of strain rate and temperature effect on material fracture were analyzed and introduced.Among them,MMC model,Lou-Hoh model,MBW model and strongly coupled shear modified GTN model and Rousselier model achieve good fracture prediction results used in advanced high-strength double phase steel,TRIP steel,QP steel and other materials.In addition,the parameter calibration methods of ductile fracture model were introduced,and the key issues and development directions of ductile fracture model of advanced high-strength steel for automobiles in the future were proposed.