Effect of machining-induced residual stress on springback of creep age formed AA2050 plates with asymmetric creep-ageing behaviour
作者： Yong Li , Zhusheng Shi , Jianguo Lin , Yo-Lun Yang , Patrick Saillard
DOI: 10.1016/J.IJMACHTOOLS.2018.05.003
关键词:
摘要: Abstract Effect of machining-induced residual stresses on springback creep age formed (CAFed) AA2050 plates with asymmetric creep-ageing behaviour has been investigated experimentally and numerically in this study. A finite element (FE) model integrating unified constitutive for CAF developed through a commercial FE software-PAM-STAMP simplified stress field aluminium alloy proposed implemented into the model. Different levels have considered numerical results compared corresponding experiments surface measurements. Results show that prediction models significantly improved when effect was considered. The best can be achieved certain level each plate thickness increases decreasing produced by machining, which agrees well measurement results. For behaviour, different observed levels: introduction fields either decrease or increase deflections CAFed plates, depending relative caused applied external forces. When is large, subsurface may exceed elastic limit after applying force, leading to significant plates.
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