基于应变补偿的SA508-3钢本构模型修正
Modification of Constitutive Model of SA508-3 Steel Based on Strain Compensation
李景丹 1李荣斌 2梁红玉1
作者信息
- 1. 太原工业学院 机械工程系,山西 太原 030013
- 2. 上海电机学院 材料学院,上海 201306;上海理工大学 材料科学与工程学院,上海 200093
- 折叠
摘要
在Gleeble1500D 热模拟试验机上开展了SA508-3 钢的热压缩试验,研究了该材料的热变形行为.试验参数为温度 800～1200℃,应变速率 0.001～1 s-1,变形量 45%.根据应力-应变曲线数据,采用应变补偿法建立了SA508-3钢的修正本构模型.该模型是在综合考虑变形温度、应变速率对流变应力影响的Arrhenius本构模型基础上,引入应变对模型中各参数的影响得到的.通过对比修正本构模型的应力预测值与试验真实值之间的相关系数R、平均相对误差AARE,得出R为 0.996,AARE为 4.89%,证明修正后的模型具有较高的精度.
Abstract
The hot compression test of SA508-3 steel was carried out on Gleeble1500D thermal simulation testing machine,and the hot deformation behavior of the material was studied.The test parameters were the temperature of 800-1200℃,the strain rate of 0.001-1 s-1,and the deformation amount of 45%.The modified constitutive model of SA508-3 steel was established by using the strain compensation method.The model is obtained based on the Arrhenius constitutive model which comprehensively considers the influence of the deformation temperature and strain rate on the flow stress and the introduction of strain on each parameter in the model.By comparing the correlation coefficient(R)and the average relative error(AARE)between the stress prediction value of the revised constitutive model and the true value of the test,the R is 0.996 and the AARE is 4.89%,which proves that the revised model has high accuracy.
关键词
应变补偿/本构模型/SA508-3钢Key words
strain compensation/constitutive model/SA508-3 steel引用本文复制引用
基金项目
上海大件热制造工程技术研究中心项目(18DZ2253400)
太原工业学院引进人才科研资助项目(20020109)
出版年
2024
NETL
NSTL
万方数据