A comprehensive model of plastic wear based on the discrete element method
A comprehensive model of plastic wear based on the discrete element method
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DOI：
10.1016/j.powtec.2022.117864
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发表时间：
2022-08
影响因子：
5.2
通讯作者：
R. Capozza;K. Hanley
中科院分区：
文献类型：
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作者：
R. Capozza;K. Hanley
一个全面的磨损计算模型已经开发。它模拟了由于刚性压头的刮擦或刚性弹丸的垂直/斜向冲击造成的表面磨损。一组球体模拟表面，其特征在于硬度。当压力超过阈值时，球体会发生位移，以应对表面轮廓的变化。在冲击的情况下，磨损体积随着速度的增加而增加，并在0和90 ° C之间达到最大值。在刮擦的情况下，磨损体积对正常载荷的依赖性在有限的载荷范围内是线性的（Archard定律），并且随着载荷的增加而过渡到非线性行为。能量耗散自然地包括在模型中，而没有附加参数。这种概念上简单的方法可以很容易地扩展到各种工业应用建模，并可能预测不同情况下的磨损模式。
A comprehensive computational model of wear has been developed. It simulates the wearing of a surface due to both scratching with a rigid indenter or normal/oblique impact of a rigid projectile. A group of spheres models the surface, characterised by the hardness. When the pressure overcomes a threshold, spheres are displaced to account for the change in surface profile. In the case of impact, the wear volume grows with the velocity and reaches a maximum between 0 and 90∘. In the case of scratching, the dependence of the worn volume on the normal load is linear in a limited range of loads (Archard’s law) and transitions to a non-linear behaviour with the increase of load. Energy dissipation is naturally included in the model without additional parameters. This conceptually simple approach can easily be extended to model a variety of industrial applications and potentially predict wear patterns under varying scenarios.