基于304不锈钢的成形极限预测实验方法研究  

On Experimental Method of Forming Limit Prediction Based on 304 Stainless Steel

作　　者：林健 丁明明 侯波 张晨阳 LIN Jian;DING Mingming;HOU Bo;ZHANG Chenyang(School of Mechanical Engineering,Ningxia University,Yinchuan 750021,China;School of Mechanical and Automotive Engineering,Zhejiang University of Water Resources and Electric Power,Hangzhou 310018,China;School of Mechanical Engineering,North China University of Water Resources and Water Power,Zhengzhou 450021,China)

机构地区：[1]宁夏大学机械学院,宁夏银川750021 [2]浙江水利水电学院机械与汽车工程学院,浙江杭州310018 [3]华北水利水电大学机械学院,河南郑州450021

出　　处：《浙江水利水电学院学报》2024年第5期85-90,共6页Journal of Zhejiang University of Water Resources and Electric Power

基　　金：浙江省重点研发计划项目(2020001062)。

摘　　要：成形性能测试实验中常用的获取材料成形极限曲线的实验方法有电腐蚀网格附着方法与油漆喷涂散斑附着方法,但通过这2种方法所获取的成形极限曲线在成形极限预测中的差异尚不明确。在电腐蚀网格附着方法中,分别使用Hecker方法和GMAS软件2种不同的数据处理方式获取成形极限曲线;在油漆喷涂散斑附着方法中,基于DIC技术使用T-D法获取成形极限曲线。将获得的成形极限曲线引入Dynaform有限元仿真中作为破裂判据对板材破裂时的减薄率进行预测,并与实验结果进行对比分析。研究结果表明:不同实验方法获取的成形极限曲线对304不锈钢板材破裂时减薄率的预测存在一定的差异,其中当板材宽度较小时,散斑曲线对破裂的预测更为接近实际情况;当板材宽度逐渐增大至接近板材长度时,GMAS曲线对破裂的预测更为接近实际情况。The experimental methods commonly used to obtain the forming limit curve are electrocorrosive grid attachment method and paint spraying speckle attachment method,but the difference between the forming limit curves in the forming limit prediction obtained by these two methods is not clear.In the electric corrosion grid attachment method,two different data processing methods,Hecker method and GMAS software,are used to obtain the forming limit curve,which is obtained by T-D method based on DIC technology in speckle attachment method of paint spraying.The obtained forming limit curve is introduced into Dynaform finite element simulation as a rupture criterion to predict the thinning rate of plate rupture,and to compare with the experimental results.The results show that the forming limit curves obtained by different experimental methods have some differences in the prediction of thinning rate of 304 stainless steel plate.When the plate width is small,the prediction of speckle curve is closer to the actual situation,and when the plate width increases gradually close to the length of the plate,the fracture prediction of the GMAS curve is closer to the actual situation.

关 键 词：成形极限曲线:Dynaform 减薄率 

分 类 号：TG335[金属学及工艺—金属压力加工]