关键词: 复合材料, 层合圆柱壳体, ANSYS／LS-DYNA 冲击, 仿真

Abstract:

:According to the kinetics of composite-laminated cylindrical shells subjected to axial impact loads, the cushioning energy-absorbing property of the standard and the petal-triggered GFRP （Glass Fiber-Reinforced Composite）-laminated cylindrical shells are investigated through the quasi-static compression test. Then, by setting up a material model which implements the Chang-Chang failure criterion, the dynamic response process of the shells under drop impact is simulated using ANSYS/LS-DYNA. The simulated results of the normal composite-laminated cylindrical shells accord well with the experimental ones in terms of some key characteristics, and the simulation errors of velocity, displacement, acceleration and peak acceleration are found to be 19.5%, 12. 0%, 6. 4% and 14. 6%, respectively. Moreover, the improvement of triggering mode of the petal-triggered composite-laminated cylindrical shells increases the specific energy-absorbing value, greatly decreases the initial peak load, and prolongs the compression displacement for the peak load. It is thus concluded that the model based on the Chang-Chang failure criterion helps to precisely predict the crushing process and the failure of the material.

Key words: composite, laminated cylindrical shell, ANSYS/LS-DYNA, impact, simulation