摘要
利用霍普金森压杆实验装置,对高氮奥氏体不锈钢进行不同温度、不同应变率下的动态冲击试验,获得应力-应变曲线,探讨了应变率强化效应和温度效应。依据高氮奥氏体不锈钢所呈现的流动应力响应行为特征,建立了一种Johnson-Cook本构模型,考虑了应变、应变率间的耦合作用和温度对其流动应力的影响。利用Abaqus软件对压杆实验进行仿真模拟。结果表明本构模型拟合的曲线与试验曲线具有较高一致性。
Based on the stress-strain curves obtained by the Hopkinson pressure bar experimental device,the dynamic impact tests of high-nitrogen austenitic stainless steels at different temperatures and strain rates were carried out,and the strain rate strengthening effect and temperature effect were discussed.Based on the characteristics of the flow stress response behavior of high-nitrogen austenitic stainless steels,a new Johnson-Cook constitutive model is established,which considers the coupling effect between strain and strain rate and the influence of temperature on the flow stress.Based on the model parameters,abaqus software was used to simulate the pressure rod experiment.The results show that the curves fitted by the constitutive model are in good agreement with the test curves,which verifies the accuracy of the mechanical parameters of high-nitrogen austenitic stainless steels.
作者
黄文波
项赫
彭翔飞
崔新忠
朱成席
杨阳
ZHU Chengxi;YANG Yang(China Academy of Ordnance Science Ningbo Branch,Ningbo 315100,China)
出处
《兵器装备工程学报》
北大核心
2025年第S1期269-274,共6页
Journal of Ordnance Equipment Engineering
基金
山西省重点研发计划项目(202302050201012)。
