Distortion Prediction of a Dual-disc Part by Turning-induced Residual Stresses Mapping

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• 作者：Liuqing Yang ; Yuxin Sun ; Chungang Zhuang ; Zhenhua Xiong ; ^{mexiong@sjtu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：distortion ; residual stress profiles ; turning ; thin-walled parts
• 刊名：Procedia CIRP
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：56
• 期：Complete
• 页码：249-254
• 全文大小：542 K

文摘

Residual stresses induced by machining can significantly affect distortions of thin-walled components in aerospace industries. Since finite element cutting models for entire parts are time-consuming and redundant, in this paper, a method is proposed to map residual stress profiles to complicated surfaces of the entire model. Transformation from the local coordinate system to the global coordinate system is considered. Elements at surface layers are assigned stress components according to their depths and directions. As a case study, an axisymmetric model of a dual-disc mapped with two kinds of typical turning-induced residual stress profiles, which are obtained by experiment measurements, is investigated. The model operated efficiently due to a pretreatment work for the specific part. Simulation results show good agreement with the basic distortion magnitudes and linear superposition principles. Distortions are greatly subject to combinations of the stress profiles. Moreover, it is found that distortions can be reduced to several micrometers when opposite surfaces are mapped with the same profiles.