Transactions of Materials and Heat Treatment

Title：Test and FEM simulation of springback for aluminum alloy sheet bending

Authors： WANG Wei LI Dong-sheng LI Xiao-qiang

Unit： Beihang University

KeyWords： aluminum alloy sheet bending springback yielding criterion hardening model finite element method

ClassificationCode：TG316.1+4

year,vol(issue):pagenumber：2013,38(3):160-164

Abstract：

Aluminium 6111-T4 large curvature radius of pure bending springback examples being put forward in the NUMISHEET' 2002 session was adopted to research springback angle and forming force of the different sheet rolling directions. Based on the Hill'48 yield criterion and Barlat'89 yield criterion from the finite element analysis software eta/Dynaform, finite element simulation was conducted. During this study process, the exponential hardening model and linear hardening model were used. Comparing the simulated results with the experimental results，it shows that the punch pressure increases with the increasing of the punch stroke, the springback angle increases as well; the simulated springback accuracy value is the highest and the error is 8.86% by adopting the Barlat'89 yield criterion and index hardening model, and the springback accuracy value obtained by adopting the Hill'48 yield criterion and index hardening model is smaller and the error is 14.67%; the mode of yield criterion has larger effects on springback value than hardening expression, and the hardening mode has little effect on springback value.

Funds：

国家自然科学基金资助项目（50905008）；航空科学基金资助项目（2010ZE51050）

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