摘要
以某车用热成形高强钢板材为研究对象,结合DIC技术对剪切、拉伸等5种典型应力状态下试样的断裂性能进行了测试研究。基于试验结果,选取Gissmo断裂失效模型,并采用有限元逆向优化方法标定了该模型的参数。分别应用Gissmo断裂失效模型和固定应变断裂模型预测了高强钢B柱在三点静压工况下的断裂失效行为,并对预测结果进行了试验验证。结果表明,在复杂应力状态下,与固定应变断裂模型相比,Gissmo断裂失效模型的预测结果与试验结果均显示在相同位置产生裂纹,载荷-位移曲线吻合程度更高,表明Gissmo断裂失效模型更适合用于预测车用高强钢在复杂应力状态下的断裂失效行为。
A hot-formed automotive high-strength steel sheet was taken as the research object,the fracture performance of specimens under five typical stress state such as shear and tension was tested combined with DIC technology.Based on the test results,the Gissmo fracture failure model was selected,and parameters of this model were calibrated using finite element reverse optimization method.The Gissmo fracture failure model and the fixed strain fracture model were used to predict the fracture failure behavior of high-strength steel B-pillars under the condition of three-point static pressure respectively,and the prediction results were verified by test.The results show that under complex stress state,compared with fixed strain fracture model,both the predicted results of Gissmo fracture failure model and the test results show the crack generaes at the same position,and the aggrement degree of load-displacement curve is higher,which indicates that Gissmo fracture failure model is more suitable to predict the fracture failure behavior of automobile high-strength steel under complex stress state.
作者
周佳
梁宾
赵岩
高翔
张志
赵清江
万鑫铭
ZHOU Jia;LIANG Bin;ZHAO Yan;GAO Xiang;ZHANG Zhi;ZHAO Qing-jiang;WAN Xin-ming(China Automotive Engineering Research Institute Co.,Ltd.,Chongqing 401122,China;Chongqing Automotive Lightweight Engineering Technology Research Center,Chongqing 401122,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2021年第3期153-163,共11页
Journal of Plasticity Engineering
基金
国家自然科学/中国汽车产业创新发展联合基金资助项目(U1764252)
重庆市技术创新与应用示范专项产业类重点研发项目(cstc2018jszx-cyzdX0076,cstc2018jszx-cyzdX0082)。
