Abstract
Static toughness and impact-induced-damage of an adhesively bonded interface between two GFRP laminates are determined. A polyfunctional epoxy system, Epibond 1590 A/B, is employed as the adhesive. It is modified with a small amount of high molecular carboxylated acrylonitrile butadiene (XNBR) to enhance the toughness of adhesively bonded interface. To determine the optimum amount of XNBR four candidate proportions 0, 5, 7.5 and 10% of XNBR are explored. The Epibond 1590 A/B adhesive modified with 7.5% XNBR by weight gives the best performances. Impact studies on panels made of glassfiber fabric and impacted with incident impact energy of 9—12 J show a small separation failure on the adhesive interface which is much smaller than interlaminar delamination. However, impact induced experiments on glassfiber angle ply adherends with 12 J impact energy do not exhibit any separation failure on the adhesive interface although the interlaminar delamination is quite extensive.
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