Transactions of Materials and Heat Treatment

Title：Simulation and experiment on creep aging for thin wall component with ellipsoid surface

Authors： Yang Zhan Zhan Lihua Wang Meng Chang Zhilong Ma Yunlong Wan Li

Unit： Central South University Beijing Institute of Astronautical Systems Engineering Capital Aerospace Machinery Company Limited

KeyWords： thin wall component with ellipsoid surface aluminum alloy 2219 creep aging finite element simulation forming property

ClassificationCode：TG146.21

year,vol(issue):pagenumber：2018,43(2):0-0

Abstract：

Based on the macro-microscopic unified creep aging constitutive model of aluminum alloy 2219, the secondary development was conducted by the large-scale commercial finite element analysis software MSC.MARC, and the creep aging process of thin wall component with ellipsoid surface for carrier rocket fuel tank melon flap was simulated. Then, the distribution and variation law of stress, strain, yield strength of components were analyzed during the simulation process，and the creep aging tests of tank melop flap were carried out. The comparison between simulation results and test results shows that the deviation of each position for components is within 1.95 mm, and the optimal position of mechanical properties is in the midpoint of bottom edge. Furthermore, the distribution of tested yield strength at the typical position is consistent with the simulation results with a deviation of 6.62%, and the yield strength values at different rolling angles of each component exhibit a tendency of 0°<45°<90°. Thus, the simulation results are in good agreement with the test results, and the correctness of creep aging constitutive model and finite element simulation model are verified.

Funds：

国防科工局预研项目（JCKY2014203A001）；国家重点基础研究发展计划（2014CB046602）

作者简介：杨占（1991-），男，硕士研究生 E-mail：734726461@qq.com 通信作者：湛利华（1976-），女，博士，教授 E-mail:yjs-east@csu.edu.cn

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