7N01铝合金Johnson-Cook模型参数的反算方法  

Reverse Calculation Method for Johnson-Cook Model Parameters of 7N01 Aluminum Alloy

作　　者：吕思雨 钟睦 葛凯 LYU Siyu;ZHONG Mu;GE Kai(Key Laboratory of Traffic Safety on Track,Ministry of Education,Changsha Hunan 410075,China;Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Changsha Hunan 410075,China;National&Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Changsha Hunan 410075,China;Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]轨道交通安全教育部重点实验室,湖南长沙410075 [2]轨道交通安全关键技术国际合作联合实验室,湖南长沙410075 [3]轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙410075 [4]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2020年第1期139-142,共4页Railway Engineering

基　　金：中国铁路总公司科技研究开发计划（J2017G010）;中国铁道科学研究院集团有限公司基金（2018YJ182）

摘　　要：对动车组用7N01铝合金进行准静态单向拉伸试验,获取应力-应变曲线。采用曲线拟合和有限元仿真优化相结合的方法反算铝合金Johnson-Cook模型参数:通过曲线拟合方法确定模型初始参数,将其代入有限元模型,应用HyperStudy软件实现与有限元模型及求解器的数据传递与过程集成,采用遗传算法和自适应响应面法对材料参数进行优化,并将优化后的有限元仿真结果与拉伸试验结果进行对比。结果表明:利用遗传算法和自适应响应面法反算材料参数,优化收敛速度快,仿真数据与试验数据吻合度高,2种方法均可以用来进行参数反算的优化。The quasi-static uniaxial tensile test was carried out on the 7N01 aluminum alloy for the EMU to obtain the stress-strain curve.The reverse calculation method of curve fitting and finite element simulation optimization was used to find the parameters of aluminum alloy Johnson-Cook model.The initial parameters of the model were determined by curve fitting method,which were substituted into the finite element model.Hyperstudy software was used to realize the data transfer and process integration with the finite element model and solver.The material parameters were optimized by GA(Genetic Algorithm)and ARSM(Adaptive Response Surface Method),and the optimized finite element simulation results were compared with the tensile test results.The results show that the material parameters obtained by this method have a fast convergence speed and the simulation data is in good agreement with the experimental data.GA and ARSM can be used to optimize the inverse parameters.

关 键 词：铝合金 Johnson-Cook模型 曲线拟合 有限元 HyperStudy 参数反算 优化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]