WCSE

Numerical Investigation on Crashworthiness of Fiber Braided Composites Subjected to Oblique Hypervelocity Impact

Abstract— The impact damage and crashworthiness of flexible braided composite structures were numerically evaluated by means of the finite element (FEM) and smoothed particle hydrodynamics (SPH) method. Numerical models of the fiber braided composite considering micro structures were constructed and validated by comparing simulation results with experiments. Specifically, effect of the impact angle on behaviors of the flexible braided composites were analyzed. Results show that the FEM-SPH models could effectively simulate failure and perforation of the braided composite structure. Impact angle could affect the crashworthiness and damage characteristics of the composites significantly. The shape and size variation of debris cloud under different impact angles are obtained. With the increase of impact angle, from the perforation of the shields and the absorption of the projectile kinetic energy, the damage ability of projectile to the shield increases first and then decreases.

Index Terms— hypervelocity impact, fiber braided composite, oblique impact, FEM-SPH.

Mingyu Cai
School of Mechanical Engineering Southeast University
Dahai Zhang
School of Mechanical Engineering Southeast University
Song Wu
Department of Aeronautics and Astronautics Fudan University; Shanghai Aerospace System Engineering Research Institute
Qingguo Fei
School of Mechanical Engineering Southeast University

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Cite: Mingyu Cai, Dahai Zhang, Song Wu, Qingguo Fei, " Numerical Investigation on Crashworthiness of Fiber Braided Composites Subjected to Oblique Hypervelocity Impact, " WCSE 2022 Spring Event: 2022 9th International Conference on Industrial Engineering and Applications, pp. 1041-1047, Sanya, China, April 15-18, 2022.