Experimental Study on Impact Resistance Properties of T300/Epoxy Composite Laminates

摘要

The impact resistance properties of T300/epoxy composite laminates are experimented at different velocities of 10-300 m/s striking on the laminates [(45/-45)(4)](s), [(0/45/90/-45)(2)](s), and [(0/45/90/-45)(4)](s). The striking and residual velocities of bullets shot by a high-speed gas gun are measured by laser velocity measurement device. In the tests, the whole penetration process is recorded by high-speed camera from the front side of targets, and then the fracture and the energy absorption of specimens are analyzed. Under the high-velocity impact, the in situ stress distribution is investigated through the reading of strain gages installed on specimens. Failure models of target laminates are discussed at three types of bullet striking velocities, classified as the less, equal, and lager than the ballistic limit velocity.