Abstract A 3D finite element model to understand the erosion behaviour of unidirectional glass fiber/epoxy (GF/EP) composites by the impact of Al2O3 erodent particle is presented. The erodent particles are impacting at a constant velocity of 100 m/s. A multi-scale modelling technique is presented and the results are compared with experiments. The multiscale approach involves a heterogeneous microscale model containing the information of fibers and matrix and is centrally embedded in an equivalent homogeneous macroscale surrounding part. The multiscale model captures the plastic deformation and localized bending deformation in the fibers and elucidates the role of both matrix and fiber in governing the total erosion behaviour of the composite. The results from the multiscale model are in good agreement with the experimental results in terms of the mechanisms involved and the erosion behaviour of the composite. The erodent particle shape effect was also studied. The point of contact of the particle depends on the shape of the particle. The erodent particle shape was found to play an important role in the erosion process. The peak value of erosion depends on the point of contact of the erodent particle and shifts to a shallow angle as the point of contact decreases.

中文翻译：

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单向玻璃纤维环氧复合材料侵蚀行为的实验和计算分析

摘要 提出了一个 3D 有限元模型，以了解在 Al2O3 侵蚀颗粒的影响下单向玻璃纤维/环氧树脂 (GF/EP) 复合材料的侵蚀行为。侵蚀颗粒以 100 m/s 的恒定速度撞击。提出了一种多尺度建模技术，并将结果与​​实验进行了比较。多尺度方法涉及包含纤维和基质信息的异质微尺度模型，并集中嵌入等效的同质宏观尺度周围部分。多尺度模型捕捉了纤维中的塑性变形和局部弯曲变形，并阐明了基体和纤维在控制复合材料总侵蚀行为中的作用。多尺度模型的结果在所涉及的机制和复合材料的侵蚀行为方面与实验结果非常一致。还研究了侵蚀颗粒形状效应。颗粒的接触点取决于颗粒的形状。发现侵蚀颗粒的形状在侵蚀过程中起重要作用。侵蚀的峰值取决于侵蚀颗粒的接触点，并随着接触点的减少而转移到一个小角度。