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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Transient dynamic finite element simulation for prediction of surface integrity induced by waterjet peening
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Transient dynamic finite element simulation for prediction of surface integrity induced by waterjet peening

机译：瞬态动态有限元模拟预测喷水喷丸引起的表面完整性

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This paper aims to develop and validate the transient dynamic finite element three-dimensional simulation of a waterjet peening process to predict surface properties (residual stresses, plastic strains, surface roughness, and superficial damage). The finite-element model considers an impingement of multisets of droplets, which strike the treated surface by impact pressures over the corresponding contact regions at high velocities. The impact pressures and their durations are modelled by using the liquid impact theory combined with an impact velocity law depending on the main parameters of the process. The behavior law of the material is an elastoviscoplastic law coupled to the Johnson-Cook damage criterion. The effectiveness of this simulation is discussed in two cases: (i) a linear mono-set of droplets and (ii) multisets of droplets using the experimental results of a waterjet-peened Al7075-T6 aluminum alloy. The predictive results of surface properties obtained by simulation with multi-sets of droplets appear more realistic than those obtained by simulation with a single set of droplets and more close to the experimental surface properties.
机译：本文旨在开发和验证喷水喷丸过程的瞬态动态有限元三维模拟，以预测表面特性（残余应力，塑性应变，表面粗糙度和表面损伤）。有限元模型考虑了多滴液滴的撞击，这些液滴在高速下通过相应接触区域上的冲击压力撞击处理过的表面。冲击压力及其持续时间是根据过程的主要参数，结合液体冲击理论和冲击速度定律进行建模的。材料的行为定律是一种弹性粘塑性定律，与Johnson-Cook损伤准则相联系。在两种情况下讨论了此模拟的有效性：（i）液滴的线性单组和（ii）使用喷水喷丸处理的Al7075-T6铝合金的实验结果形成的液滴多组。通过多组液滴仿真获得的表面性能的预测结果似乎比通过单组液滴仿真获得的表面性能的预测结果更为真实，并且更接近于实验表面性能。

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