摘要
为了合理描述11MnNiMo钢材的动态断裂性能,利用INSTRON-5500R万能实验机和霍普金森压杆分别进行准静态和高应变率下的材料力学性能测试,获得了11MnNiMo钢的基本力学性能参数,通过实验结果拟合出J-C本构模型;基于仪器化夏比V型缺口冲击试验获得了材料的冲击断裂性能。结果表明,夏比冲击实验中的起裂时间为0.69 ms,所对应的位移为3.55 mm;而有限元模拟过程中,0.69 ms时所对应的位移为3.667 mm。实验与模拟的误差为3.3%,证明了本文所获得的J-C本构模型能够准确预测11MnNiMo钢材的冲击特性。本文内容可以为材料J-C本构模型参数的确定和11MnNiMo钢材结构的有限元模拟提供参考。
In order to reasonably describe the dynamic fracture properties of 11MnNiMo steel,the mechanical properties of 11MnNiMo steel under quasi-static and high strain rate are tested by INSTRON-5500R universal testing machine and Hopkinson compression bar respectively,due to which the basic mechanical properties parameters and the J-C constitutive model of 11MnNiMo steel are obtained.The impact fracture properties of the material are obtained by instrumented Charpy V-notch impact test.The results show that the crack initiation time in Charpy impact test is 0.69 ms,and the corresponding displacement is 3.55 mm,while the corresponding displacement at 0.69 ms in finite element simulation process is 3.667 mm.The error between experiment and simulation is 3.3%,which proves that the obtained J-C constitutive model can accurately predict the impact characteristics of 11MnNiMo steel.This paper can provide a reference for the determination of the parameters of J-C constitutive model and the finite element simulation of 11 MnNiMo steel.
作者
何沐阳
韦家祥
尹佳静
隆霞
周琛
HE Muyang;WEI Jiaxiang;YIN Jiajing;LONG Xia;ZHOU Chen(College of Aerospace and Civil Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《应用科技》
CAS
2021年第6期121-126,共6页
Applied Science and Technology
基金
国家级大学生创新训练计划项目(202010217524).
