Impact Characterization of Graphite Fiber Reinforced Thermoplastic Laminates

摘要

Instrumented drop weight impact testings were conducted in conjunction with theultrasonic C-scan and scanning electron microscopy to characterize the impact response at low velocities. Thermoplastic composite materials in the simply supported case showed dramatic improvements in impact damage resistance compared to the thermoset composite materials as reported. Scanning electron microscopy examination of the fracture surface revealed fiber matrix debonding, fiber pull-out, and a few delaminations. Matrix behavior can be characterized by a hackly appearance. On the other hand, the fracture mechanisms of the transverse normal compression and shear punch were matrix cracking and grouped lamina delamination, respectively.