Study on Improving the Interlaminar Shear Strength of Fiber Reinforced Organic Composite Materials

Attempts have been made to improve the interlaminar shear strength of various FRPs. FRPs were fabricated by changing the matrix resin, reinforcement, and woven structures, which are essential parameters, combined systematically in the FRPs. The mechanical characteristics of the fabricated FRPs were measured at room and liquid nitrogen temperature. It was found that when a coupling agent was added to the matrix resin, the interlaminar shear strength was improved by 6 to 29 % at room temperature, and also by 21 to 58 % at liquid nitrogen temperature. The effect of the additive showed only slight improvement or no change in bending strength and compressive strength. The effects of other parameters were also presented together with the possible mechanisms.