Transactions of Materials and Heat Treatment

Title：Influence of material parameter fluctuation on Vbending springback for titanium-aluminium-stainless steel laminated composite sheet

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ClassificationCode：TG386.3+1

year,vol(issue):pagenumber：2019,44(8):18-25

Abstract：

Through the relative geometric relationship between forming part and die before and after springback, the bending angle changes before and after springback were calculated accurately, and the finite element models of Vbending and springback for titaniumaluminiumstainless steel laminated composite sheet were established based on finite element method. Then, the finite element simulation results were compared with the experimental results to verify the correctness of the mode, and the influence of material parameter fluctuation of different heterogeneous layers on the bending springback of laminated composite sheet was studied. The results show that the springback angle increases with the increasing of strength coefficient of stainless steel and aluminium layers, decreases with the increasing of strain hardening index, decreases with the increasing of strength coefficient of titanium layer, increases with the increasing of strain hardening index, and decreases with the increasing of elastic modulus of each heterogeneous layer. Based on the multifactor sensitivity analysis method, the influence of material parameter fluctuation on the bending springback was analyzed. The results show that the change of titanium layer material parameters is most sensitive to the springback angle of composite sheet.

Funds：

基金项目:国家自然科学基金资助项目（51875176,51741503）；中国博士后科学基金面上基金资助项目（2016M590677）、西北工业大学凝固技术国家重点实验室开放课题资助项目（SKLSP201631）

作者简介：李艳阳（1993-），女，硕士研究生 E-mail：15737925685@163.com 通讯作者：郭俊卿（1973-），男，博士，副教授 E-mail：hkdguojunqing@163.com

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