Compressive Stress of Composite Laminates after Impact

To study the effect of low-velocity impact to the residual compressive strength of composite laminates,the drop-weight impact tests and compressive failure tests were carried out on a kind of two-dimensional woven glass fabric reinforced epoxy laminate with different thickness.The forms of damage were characterized by shading methods and de-ply methods.The relationship between damage width,area,residual strength,modules and energy of impact was discussed.The finite element model was established to simulate the CAI strength with an equivalent hole and a reduced stiffness inclusion methods.