An smooth particle hydrodynamics/finite element (SPH/FEM) model was developed to simulate the erosion of zirconia particle‐reinforced epoxy composites, due to the overlapping impacts of angular particles at both perpendicular and oblique incidences. For each composite target, multiple sub‐volumes, each having their own random reinforcement distribution, were modeled. The reinforcements were assumed as noneroding and nondeforming and were distributed in the modeled sub‐volumes according to the random distributions measured in the actual samples. Erosion tests were performed to verify the numerical model, and it was found that the erosion rates of the zirconia‐reinforced composites were in all cases significantly lower than the neat epoxy. The experimentally‐observed erosion mechanisms were successfully simulated by the model, and the predicted erosion rates matched the measured ones to within 2% to 11%. It is anticipated that similar models can be used to predict erosion of other particulate composite systems whose reinforcement erosion and fracture is negligible compared to the matrix erosion.

中文翻译：

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角碳化硅颗粒对氧化锆颗粒增强环氧基复合材料腐蚀的数值和实验研究

建立了光滑的颗粒流体动力学/有限元（SPH / FEM）模型，以模拟氧化锆颗粒增强的环氧复合材料的腐蚀，这是由于角颗粒在垂直和倾斜入射时的重叠影响所致。对于每个复合目标，都对多个子体积建模，每个子体积都有自己的随机增强分布。钢筋被假定为不变形和不变形，并根据实际样品中测得的随机分布分布在模型子体积中。进行了侵蚀测试以验证数值模型，结果发现，在所有情况下，氧化锆增强复合材料的腐蚀速率均显着低于纯环氧树脂。该模型成功地模拟了实验观察到的腐蚀机理，预测的侵蚀率与测得的相符，在2％至11％之内。可以预期，类似的模型可用于预测其他颗粒复合材料系统的腐蚀，与基体腐蚀相比，这些复合材料的增强腐蚀和断裂可忽略不计。