Finite Element Analysis for Effect Factor to Cold Rolling Residual Stress of 7075 Aero Aluminum Alloy ThickPlate

摘要：

Based on plastic deformation theory, it is acknowledged that rolling reduction and roller radius have significant effect on rolling residual stress. Since residual stress results in machining deformation of aerospace monolithic components, a cold rolling model of 7075 aluminum alloy thickplate is established by elasplastic large deformation finite element method, and the influence law of percent reduction and roller radius to residual stress is obtained respectively so as to refine residual stress distribution and to reduce stress value. The finite element model has been proved effective by comparing the results of simulation with that of experiment Results show that the whole residual stress increases along with the rolling reduction and the stress distribution experiences four different stages in sequence. As roller radius decreases, rolling quality becomes better, and the residual stress distribution becomes uniform; at the same time, the stress in surface layer grows while the one in internal layer reduces.

关键词： cold rolling residual stress numerical simulation shape factor plastic deformation

作者: Li Haiyan Zhang Yidu

作者单位: School of Mechanical Engineering, Beijing University of Aeronautics and Astronautics,Beijing 100191, School of Mechanical Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191

会议类型: 国际会议

会议名称: 2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)

会议地点: 西安

会议语种:英文

页码: 946-949

在线出版日期: 2010-09-01（万方平台首次上网日期，不代表论文的发表时间）