基于碰撞的车身5182铝合金热成形构件流变行为研究  

Flow Behavior of the Hot Forming Part of AA5182 Aluminum Alloy for Vehicle Body Based on Crash

作　　者：孙宏图[1] 王健[1] 申国哲[2] 胡平[2] 周华维[1] 

机构地区：[1]鲁东大学交通学院,烟台264025 [2]大连理工大学汽车工程学院,大连116024

出　　处：《机械科学与技术》2014年第2期293-297,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金重点项目(10932003);国家重点基础研究发展计划(973计划)项目(2010CB-832700)资助

摘　　要：在应变速率为0.001 5 s-1、0.015 s-1、0.15 s-1和1.5 s-1条件下,对5182铝合金热成形构件试样进行拉伸试验,建立了5182铝合金修正的Johnson-cook本构模型;通过5182铝合金热成形构件车身的正面碰撞模拟计算,分析了5182铝合金热成形构件的变形和吸能特性。研究结果表明:随应变率增加,5182铝合金的流变应力有所增加,并使断裂应变有所降低。5182铝合金热成形构件车身变形合理,具有较好的碰撞吸能特性。因此,验证了5182铝合金热成形构件在车身上应用可行。Abstract： The hot tension for hot forming part of AA5182 aluminum alloy are carried out at the strain rates of 0.001 5 s-1 , 0.015 s-1 , 0.15 s-1 , and 1.5 s-1 , and the developed Johnson-cook constitutive model for the simulation of frontal impact is presented. The energy absorbing performance and mechanical properties for the vehicle body of hot forming part of AA5182 aluminum alloy are analyzed. The results show that the higher the flow stress and the lower the fractured strain of hot forming part of AA5182 aluminum alloy with the increasing of strain rate. The intrusion dis- placement of the hot forming 5182 aluminum alloy parts is appropriate for the satisfaction of vehicle body, there is a better energy absorbing performance and mechanical properties of hot forming part of AA5182 aluminum alloy for the vehicle body. Therefore the hot forming part of 5182 aluminum alloy can be applied to vehicle body design.

关 键 词：5182铝合金 热成形 流变行为 轻量化 碰撞 

分 类 号：U463.82[机械工程—车辆工程]