Revealing the effects of matrix behavior on low-velocity impact response of continuous fiber-reinforced thermoplastic laminates

摘要: Abstract Matrix behavior is expected to widely influence the impact response of composites, but detailed conclusions in case thermoplastic laminates are still needed. In this paper, we investigated effect using either ductile homopolymer PP or less-ductile copolymer matrices on low-velocity responses continuous glass fiber-reinforced polypropylene (PP) laminate. These types represent two variants same family matrix. A thorough experimental campaign was first performed provide tensile properties (for and glass/PP) fracture toughness (Mode-I Mode-II, glass/PP only) employed materials. Then, tests where energy levels ranging from 12 30 J were performed. Using reduces dissipated during as well damage area. The selected stacking sequences resistance also studied a way reveal difference between glass/PP. Stacking sequence with thin plies shows better than other regardless matrix ductility, which can be explained by micromechanics for both grades material. Finally, quasi-static indentation (QSI) usually used quickly access towards out-of-plane impact, systematically compared our results QSI results. We found that prospective use forecasting very limited composite due strain-rate sensitivity.