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| Abstract |
Understanding the shear behavior and resulting fiber failure of fiber-reinforced plastics (FRPs) is required for better prediction of their behavior during the machining process, but knowledge regardi...ng the shear strength of fiber failure is limited. In this study, out-of-plane shear tests were conducted to observe the shear behavior of carbon FRP (CFRP) laminates subjected to high shear stress exceeding the shear strength of matrix failure. The longitudinal fibers in CFRP unidirectional laminates were cut by shear loading without severe internal damage and the maximum shear stress causing progressive fiber breaks was much higher than the shear strength of matrix failure. This result suggested the possibility of out-of-plane shearing as a machining method for FRPs and shear tests were subsequently performed for CFRP crossply laminates. Delamination was generated by high shear stress to cut the reinforcing fibers, but the size of the remaining damage was small even in the thermoset CFRP laminates in which delamination likely occurs, without any optimization of the trimming conditions.show more
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