Puncture of a fiberglass laminate during hypervelocity impact

The limiting thickness of a fiberglass laminate target during a hypervelocity (3–7.3 km/sec) impact by steel and glass particles 0.8–2 mm diameter. It is shown that the strength of the target significantly affects the limiting penetration thickness, and the area of secondary damage is larger by two orders of magnitude than the area of the hole. The fracture of a uniaxial fiberglass laminate is characterized by a large difference in the transverse dimensions of the damage regions, which is caused by the cnisotropy of the mechanical properties of the material.