单向复合材料及纯树脂材料抗冲击性能的比较

摘要

Finite element software package ABAQUS is used to calculate the impact responses of unidirectional composite at the level of yam and resin substrate. Through analytical comparison with pure resin material in terms of impact resistance power under the identical conditions, the impact resistance property and main absorption mechanisms of unidirectional composite are expounded by analyzing the bullet velocity-time curve, impact stress distributions on the composites with different components. Under impact action, the unidirectional composite, compared with the pure resin material, dissipates the impact energy more quickly, indicating it has better energy absorption performance. In addition, the peak value of stress in the yarn is greater than that in the resin. It is concluded that the impact energy is mainly absorbed by the reinforcement of yarns in the unidirectional composite. This leads to better impact resistance for the unidirectional composite than the pure resin material.%运用有限元软件ABAQUS,在纱线与树脂基体尺度上计算单向复合材料的抗冲击过程.通过对比分析相同条件下纯树脂材料的抗冲击能力,从弹体的速度变化曲线、冲击应力在复合材料不同组分上的分布等方面说明单向复合材料的抗冲击行为和主要吸能机制.在冲击作用下,与纯树脂材料相比,单向复合材料可使冲击能量在较短的时间内耗散,从而表现出更好的能量吸收性能.此外,单向复合材料中纱线部分的应力峰值明显比树脂部分的应力峰值大,说明单向复合材料所承受的冲击能量主要被纱线增强相吸收,从而具有更好的抵抗冲击能力.