Abstract:

In order to study the impact resistance of curved multi-axial warp-knitted composite automobile shells, the finite element analysis was adopted for the simulation analysis on the low-speed impact resistance of car door of a passenger vehicle adopting the composite material. An SAPH440 steel car door was utilized as the comparative item. Stress distribution, penetration, penetration velocity and internal energy of the car doors were analyzed. The results show that compared with the SAPH440 steel car, the curved multi-axial warp-knitted composite car door shows smaller deformation but higher energy absorption, enhancing the protection on persons in the car to same extent. Furthermore, the composite material provides better safety and less weight.

Key words: multi-axial warp-knitted fabric, curved composites, impact resistance, lightweight