切削法构建铝合金Al7050-T7451材料流动应力本构模型  

Flow stress determination of aluminum alloy 7050-T7451 using cutting experiment inverse analysis methods

作　　者：王虹入[1] 王中秋[1,2] 张倩[3] 李剑峰[2] 孙杰[2] 

机构地区：[1]山东省海洋环境监测技术重点实验室山东省科学院海洋仪器仪表研究所,山东青岛266001 [2]山东大学机械工程学院,山东济南250061 [3]山东大学威海分校机电与信息工程学院,山东威海264209

出　　处：《山东大学学报（工学版）》2012年第1期115-120,共6页Journal of Shandong University（Engineering Science）

基　　金：山东省自然科学基金资助项目(ZR2011EEZ001);山东省科学院博士基金资助项目(Y09-2);青岛市科技计划资助项目(10-3-4-9-2-jch)

摘　　要：基于Oxley滑移线理论,采用正交切削实验的反求方法,构建了能够描述铝合金Al7050-T7451切削加工过程的Johnson-Cook流动应力本构模型。该模型的应变范围为0.61～1.12,应变率范围为10 263～69 941,温度范围为95～248;在与模型构建相同的切削实验参数区间内,采用该模型进行有限元仿真预测的切削力误差小于15%,切削热最大值误差小于11%。Based on the Oxley slip-line theory,two-dimensional orthogonal cutting experiments in conjunction with an analytical-based computer code were used to determine Johnson-Cook flow stress data of aluminum alloy 7050-T7451 in metal cutting.The strain range was 0.61~1.12,the strain rate range was 10 263~69 941,and the temperature range was 95~248,which were covered by the model.In order to verify the flow stress model,cutting experiments were done in the same cutting parameter range used in determining the flow stress.By comparing the results obtained by experiments and FEM using the flow stress model as input,the maximum error between cutting forces simulated obtained by FEM and obtained by experiments were less than 15%,and the maximum error of temperature was less than 11%.

关 键 词：流动应力 切削试验 反求 铝合金7050-T7451 有限元 

分 类 号：TP391.77[自动化与计算机技术—计算机应用技术]