The solid particle erosion of polymers occurs in a wide variety of industries and has been extensively studied experimentally. However, numerical models capable of accurately simulating the associated material removal mechanisms and predicting erosion rate do not yet exist. In this paper, a coupled smoothed particle hydrodynamics (SPH)/finite element (FE) model was developed to simulate the erosion of an epoxy by successive overlapping impacts of angular 22 µm, 97 µm and 152 µm silicon carbide particles at various angles of attack. The epoxy was modeled using a strain-rate-dependent elastic–plastic material model that fails at a critical plastic strain. It was found that, once the critical plastic strain was calibrated using a single experiment, the numerical model could predict both the length of the incubation period and the steady-state erosion rate to within 6% and 11%, respectively, of the measured values. It was found that fundamental material removal mechanisms such as cutting, ploughing and the accumulation of plastic deformation due to multiple overlapping impacts were all successfully simulated. Overall, it has been demonstrated that numerical models can be used to investigate the effect of influential parameters on the solid particle erosion of a polymer. This may have important implications for the development of effective methods to improve the erosion resistance of polymers.

中文翻译：

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重叠角颗粒碰撞对环氧树脂固体颗粒侵蚀的数值模拟

聚合物的固体颗粒侵蚀发生在各种各样的行业中，并且已经进行了广泛的实验研究。但是，尚不存在能够准确模拟相关材料去除机制并预测腐蚀速率的数值模型。在本文中，开发了耦合的光滑粒子流体动力学（SPH）/有限元（FE）模型，以模拟在各种攻角下角22 µm，97 µm和152 µm碳化硅粒子的连续交叠冲击来模拟环氧树脂的腐蚀。使用与应变率相关的弹塑性材料模型对环氧树脂建模，该模型在临界塑性应变下会失效。发现，一旦使用单个实验校准了临界塑性应变，数值模型可以预测潜伏期的长短和稳态侵蚀率分别在测量值的6％和11％之内。结果发现，基本的材料去除机理，如切削，耕作和由于多重重叠冲击而产生的塑性变形的积累都得到了成功的模拟。总体而言，已证明数值模型可用于研究影响参数对聚合物固体颗粒侵蚀的影响。这可能对开发改善聚合物抗侵蚀性的有效方法具有重要意义。都成功地模拟了多次耕作过程中的耕作和塑性变形累积。总体而言，已证明数值模型可用于研究影响参数对聚合物固体颗粒侵蚀的影响。这可能对开发改善聚合物抗侵蚀性的有效方法具有重要意义。都成功地模拟了耕作过程以及由于多重重叠冲击而产生的塑性变形累积。总体而言，已证明数值模型可用于研究影响参数对聚合物固体颗粒侵蚀的影响。这可能对开发改善聚合物抗侵蚀性的有效方法具有重要意义。