Experimental Evaluation of Impact Damage of FRP Laminates
Miyazaki Noriyuki; Sutoh Moriyoshi; Satoh Makoto
Abstract:It is known that the strength of FRP laminates decreases due to the delamination caused by impact loading. Although a CAI (= Compression After Impact) test is often performed to evaluate the impact damage of FRP laminates, it requires a relatively large sized test specimen and a complicated test jig. The objective of the present study is to search a simple method alternative to the CAI test for evaluating impact damage of FRP laminates. For this purpose, we measured the interlaminar shearing strength (=ILSS) by means of a short beam three point bending test and the bending strength by means of a conventional three point bending test after impact damage is given to three kinds of FRPs using an air gun type test apparatus. The test results show that a short beam three point bending test after impact is a promising method for evaluating the impact damage of FRP laminates. Key Words:FRP laminates, delamination, impact damage, CAI test, ILSS, Bending strength, air gun