EXPERIMENTAL INVESTIGATION ON DEFORMATION AND LOAD BEARING BEHAVIORS OF PARTIAL HELICOIDALLY LAMINATED CFRP UNDER FOUR-POINT FLEXURE

Abstract

This paper investigates on the four-point flexural deformation and load bearing behaviors of partial helicoidally laminated CFRPs. Two partial helicoidal laminates are examined. The helicoidal laminate with limited fiber direction shows a brittle behavior. On the other hand, although the helicoidal laminate skin with cross ply core also shows a brittle behavior, the preceding wide skin damage leads to the mitigation of the brittle core fracture. In comparison with helicoidally laminated CFRP of full thickness and all fiber direction, the two partial helicoidal laminates show higher load capacity and initial stiffness.