高应变率下金属动态行为表征和断裂研究  

Dynamic behavior characterization and fracture study of metals at high strain rates

作　　者：张哲伟 尚宏春 赵文 燕超 杨臻[4] ZHANG Zhewei;SHANG Hongchun;ZHAO Wen;YAN Chao;YANG Zhen(The Tenth Military Representative Office of the Armv Equipment Department,Xi'an 710065,China;School of Mechanical Engineering,Xi'an Jiaotong University,Xi'an 710065,China;Shanxi Provincial Key Laboratory for Advanced Manufacturing Technology,North University of China,Taiyuan 030051,China;School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China)

机构地区：[1]陆装驻西安地区第十军代室,陕西西安710065 [2]西安交通大学机械工程学院,陕西西安710065 [3]中北大学先进制造技术山西省重点实验室,山西太原030051 [4]中北大学机电工程学院,山西太原030051

出　　处：《兵器材料科学与工程》2024年第6期40-46,共7页Ordnance Material Science and Engineering

基　　金：山西省基础研究计划(202203021212131);山西省基础研究计划联合资助项目(太重)(TZLH20230818014)。

摘　　要：用5种加载速率拉伸试验,研究两种晶体结构金属的应变率效应,结合Drucker屈服方程和MMC断裂准则,分别用Johnson-Cook、Zerilli-Armstrong和Modified Johnson-Cook硬化模型标定试验数据。结果表明:DP80钢和OFHC的预测误差最小的模型分别为ZA BCC模型和MJC模型。模型的数值模拟结果和标定结果一致,但应变率越高,温升效果越明显。冲击试验表明,有限元模拟结果与试件断裂形貌基本一致,所建立的模型能准确地反应金属的动态失效行为。The strain rate effects of two crystal structure metals were studied by tensile tests at five loading rates.Combined with Drucker yield equation and MMC fracture criterion,Johnson-Cook,Zerilli-Armstrong and Modified Johnson-Cook hardening models were used to calibrate the test data,respectively.The results show that the prediction error of DP80 steel and OFHC is lowest in ZA BCC model and MJC model respectively.The numerical simulation results of the model are consistent with the calibration results,but the higher the strain rate,the more obvious the temperature rise effect.The impact test shows that the finite element simulation results are basically consistent with the fracture morphology of the specimen,and the established model can accurately reflect the dynamic failure behavior of the metal.

关 键 词：动态行为 应变率效应 韧性断裂 参数标定 有限元分析 

分 类 号：TG113.25[金属学及工艺—物理冶金]