Transactions of Materials and Heat Treatment

Title：Friction effect on forming behaviors of tailor welded blanks for auto parts

Authors： CHEN Shui-sheng WANG Yu-qing ZHANG Gao-feng

Unit： Henan Polytechnic University

KeyWords： tailor welded blanks (TWBs) limit dome height friction coefficient weld movement strain distribution

ClassificationCode：TG386

year,vol(issue):pagenumber：2013,38(3):34-37

Abstract：

To improve the formability of tailor welded blanks (TWBs), friction coefficient between TWBs and tools was controlled to capture the needed forming characteristics. In the case of limit dome height (LDH) test, theoretical analysis was performed to probe the mechanical influence mechanism of friction coefficient on the forming behaviors of TWBs. And the experiment and finite element method were employed to study the effect of friction coefficient on LDH, the weld movement and the strain distribution of TWBs. The results indicate that friction coefficient has a robust effect on the forming characteristics of TWBs. With the increase of friction coefficient, LDH increases first and then decreases; the weld movement always drops; the principal strain becomes uniform. When friction coefficient reaches a certain value, the limit strain namely, the rupture position moves from the area near the weld to 30 mm offset from the weld and the failure mode of TWBs changes.

Funds：

国家自然科学基金资助项目(U1261115)

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