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

作　　者：李景丹 李荣斌 梁红玉 LI Jingdan;LI Rongbin;LIANG Hongyu(Department of Mechanical Engineering,Taiyuan Institute of Technology,Taiyuan 030013,China;School of Materials Science and Engineering,Shanghai Dianji University,Shanghai 201306,China;School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[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 [3]上海理工大学材料科学与工程学院,上海200093

出　　处：《热加工工艺》2024年第11期134-137,共4页Hot Working Technology

基　　金：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)。

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。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 

分 类 号：TG316[金属学及工艺—金属压力加工]