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RESIDUAL STRESS INDUCED BY WATERJET PEENING: A FINITE ELEMENT ANALYSIS

机译:水射流喷头引起的残余应力:有限元分析

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摘要

The concept of multiple droplet impacts resulting from ultra high-pressure waterjet (UHPWJ) was used to develop a mathematical model to describe the effect of interfacial pressure on the underlying workpiece material. A non-linear elastic-plastic finite element analysis (FEA) was carried out in this study using the interfacial pressure model to predict residual compressive stresses. This three-dimensional FEA model was based on quasi-static considerations to provide prediction of both magnitude and depth of residual stress fields in a 7075-T6 aluminum alloy (A17075-T6). Results of the FEA modeling were in good agreement with experimental measurements. Effects of applied pressures on the residual stress fields are also presented and discussed as a method of estimating high-pressure waterjet induced compressive stresses under varying process conditions for peening.
机译:超高压水射流(UHPWJ)导致的多滴冲击的概念被用于开发数学模型,以描述界面压力对下面的工件材料的影响。在这项研究中,使用界面压力模型进行了非线性弹塑性有限元分析(FEA),以预测残余压应力。此三维有限元分析模型基于准静态因素,可预测7075-T6铝合金(A17075-T6)中残余应力场的大小和深度。 FEA建模的结果与实验测量结果非常吻合。还介绍和讨论了施加压力对残余应力场的影响,作为估​​算喷丸在不同工艺条件下高压水射流引起的压缩应力的一种方法。

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