Comparative analysis of impact resistance between unidirectional composite and pure resin material

Finite element software package ABAQUS is used to calculate the impact responses of unidirectional composite at the level of yarn 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.