5052铝合金成形极限预测及数值模拟  

Forming limit prediction and numerical simulation of 5052 aluminum alloy

作　　者：孙旭慧 薛凤梅 沈文锦 李陈真 李宇涛 SUN Xu-hui;XUE Feng-mei;SHEN Wen-jin;LI Chen-zhen;LI Yu-tao(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024

出　　处：《塑性工程学报》2024年第6期43-49,共7页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51905371)。

摘　　要：基于Nakazima半球凸模胀形实验,利用有限元软件建立其简化模型。分析了润滑条件、冲压速度和凹模圆角半径对5052铝合金成形极限的影响。结果显示:随着摩擦因数的增大,成形极限曲线(FLC)向下偏移,表明理想的润滑条件有利于板材在复杂工艺下的成形;增大冲压速度也使FLC呈现下降的趋势,即在不考虑实际生产效率的情况下,降低冲压速度可以改善材料的延展性;而增大凹模圆角半径使FLC向上偏移,提高了板料的成形极限。将模拟结果与实验结果对比,两者较高的吻合度验证了有限元预测的可靠性。Based on the Nakazima hemispherical punch bulging experiment,the simplified model was established by finite element software.The effects of lubrication condition,stamping speed and die fillet radius on the forming limits of 5052 aluminum alloy were analyzed.The results show that the forming limit curve(FLC)shifts downward with the increase of friction factor,which indicates that suitable lubrication condition is favorable for the forming of sheet under complex processes.The FLC shows decreasing trend by increasing the stamping speed.It illustrates that reducing stamping speed can improve the material ductility without considering the actual production efficiency.While increasing the die fillet radius causes the FLC to shift upward and increase the forming limit of the sheet.The high coincidence between the simulation result and experiment result verified the reliability of the finite element prediction.

关 键 词：5052铝合金 成形极限图 Nakazima实验 数值模拟 

分 类 号：TG146.2[一般工业技术—材料科学与工程]