Transactions of Materials and Heat Treatment

Title：Experiment and numerical simulation of creep forming for 7475 aluminum alloy integrally stiffened panel

Authors： ZHENG Ying1 3 WU Yang2 3 ZHANG Jing2 3 DENG Yun-lai2 3

Unit： 1．Department of Mechanical & Electrical Engineering Hunan Communication Polytechnic Changsha 410004 China 2.School of Materials Science and Engineering Central South University Changsha 410083 China 3.Key Laboratory of Nonferrous Materials Science and Engineering Ministry of Education Changsha 410012 China

KeyWords： Al alloy creep forming stiffened panel springback

ClassificationCode：TG306；TG146.2+1

year,vol(issue):pagenumber：2012,37(5):42-46

Abstract：

Single curvature panel with grid\|type ribs of 7475 aluminum alloy was investigated under the creep aging forming conditions by autoclave process. The curvatures of different sections were measured by three coordinates measuring method; springback distribution laws in different areas of the formed panel were discussed. Then the constants of the unified creep constitutive equation were determined from creep aging test data, which was integrated with FE codes in ABAQUS. Based on this, the whole process of creep ageing forming was simulated and analyzed. Close agreement between experimental data and computed results was obtained. The relative error is less than 4%.

Funds：

国家重点基础研究发展计划(973)资助项目(2010CB731700)

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