Abstract:
In order to study the damage characteristics of glass fiber-stainless steel mesh hybrid laminates under high-speed oblique impact, the impact experiments with an angle of 30° were carried out on glass fiber reinforced epoxy laminates with 2 mm thickness and glass fiber-stainless steel mesh hybrid reinforced epoxy laminates with one or three layers of 304 stainless steel mesh by using a one-stage air gun. The effects of 304 stainless steel mesh on the ballistic limit and energy absorption of laminated plates were revealed, and the damage characteristics and mechanism of laminated plates were analyzed. Based on the experiments, it is found that the ballistic limit of the laminates with three layers of stainless steel mesh is the highest, while the ballistic limit velocity of the laminate without stainless steel mesh is close to that of the laminate with one stainless steel mesh. The energy absorbed by the laminate firstly increases with the increase of projectile velocity, and then becomes stable, and increases rapidly finally. The failure modes of laminates are matrix crack, matrix fracture, delamination, tensile fracture and shear fracture of fiber and stainless steel wire tensile fracture. The delamination damage area of laminated plates increases firstly and then decreases with the increase of the velocity of projectile, and finally tends to be stable. When the velocity of the projectile is low, the laminate fiber mainly produces tensile fracture, matrix cracking and delamination damage. With the increase of the velocity of the projectile, compression shear fracture of the front fiber of the laminate gradually occurs, the matrix is broken, and the back fiber has serious tensile tear.