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Simulating sliding wear with finite element method

机译:用有限元方法模拟滑动磨损

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Wear of components is often a critical factor influencing the product service life. Wear prediction is therefore an important part of engineering. The wear simulation approach with commercial finite element (FE) software ANSYS is presented in this paper. A modelling and simulation procedure is proposed and used with the linear wear law and the Euler integration scheme. Good care, however, must be taken to assure model validity and numerical solution convergence. A spherical pin-on-disc unlubricated steel contact was analysed both experimentally and with FEM, and the Lim and Ashby wear map was used to identify the wear mechanism. It was shown that the FEA wear simulation results of a given geometry and loading can be treated on the basis of wearcoefficient--sliding distance change equivalence. The finite element software ANSYS is well suited for the solving of contact problems as well as the wear simulation. The actual scatter of the wear coefficient being within the limits of±40-60% led toconsiderable deviation of wear simulation results. These results must therefore be evaluated on a relative scale to compare different design options.
机译:组件的磨损通常是影响产品使用寿命的关键因素。因此,磨损预测是工程学的重要组成部分。本文提出了使用商业有限元软件FESYS进行磨损模拟的方法。提出了一种建模和仿真程序,并将其与线性磨损定律和欧拉积分方案一起使用。但是,必须格外小心以确保模型的有效性和数值解的收敛性。通过实验和有限元方法对球形销盘式非润滑钢接触件进行了分析,并使用Lim和Ashby磨损图来确定磨损机理。结果表明,给定几何形状和载荷的FEA磨损模拟结果可以在磨损系数-滑动距离变化等价的基础上进行处理。有限元软件ANSYS非常适合解决接触问题以及磨损模拟。磨损系数的实际散度在±40-60%的范围内,导致磨损模拟结果出现相当大的偏差。因此,必须相对评估这些结果,以比较不同的设计方案。

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