Experimental and numerical investigation on the impact response of CFRP under 3-point-bending

Abstract The strain rate-dependent material characteristic of carbon fiber reinforced plastics (CFRP) is widely known and has been investigated in detail at coupon level. In this study, for the first time rate dependent a three-dimensional CFRP structure was investigated. evolution determined dependency correlated with results For purpose two special 3-point-bending fixtures were developed to obtain flexural impact response T700S DT120 prepreg system component (hat profile) rectangular specimens loaded quasi-static intermediate velocities from 3.3 × 10 − 5 10m s 1 , while structural sub components tested using 1m . With increasing velocities, experimental tests showed significant increase force failure maximum deflection increases 52% 120%, respectively. However, hat profile just 12.4% due different mode. observed initial modes compressive provoked by kinking interlaminar shear component. Regardless work proves necessity considering composite accurately predict load capacity during dynamic event. Additionally, comparison restults numerical revealed weaknesses prediction accuracy currently used models.