화학공학소재연구정보센터
Journal of Adhesion Science and Technology, Vol.27, No.23, 2507-2516, 2013
Glass/epoxy composites and aluminium alloy joint using Kevlar (R) intermediate layer and nanoclay-reinforced epoxy adhesive
Adhesive lap joint between glass fibre/epoxy composites and aluminium alloy (2014 T4) was prepared by an in situ moulding process using a matched die mould. The surface of aluminium alloy was treated with chromic acid before adhesive bonding. Lap shear strength and fatigue life were evaluated in tensile mode and tension-compression mode (at 40% of lap shear load of adhesive joint), respectively. Knurling on the surface of aluminium alloy improved the lap shear strength of the adhesive joint but did not influence the fatigue life of the same. Lap shear strength and fatigue life of adhesive joint made with neat epoxy adhesive and reinforcement of an intermediate layer of Kevlar((R)) between glass/epoxy composite and aluminium alloy were observed to be 0.44kg/mm(2) and 3.6x10(5) cycles, respectively. In another case, lap shear strength and fatigue life of similar type of adhesive joint made from nanoclay (Cloisite 30B)-reinforced epoxy adhesive and without reinforcement of an intermediate layer of Kevlar((R)) were observed to be 0.38kg/mm(2) and 2.3x10(5) cycles, respectively. Whereas, lap shear strength and fatigue life of adhesive joint made from nanoclay-reinforced epoxy adhesive along with the reinforcement of an intermediate layer of Kevlar((R)) were 0.48kg/mm(2) and 3.9x10(5) cycles, respectively. Therefore, adhesive joint made from nanoclay-reinforced epoxy adhesive along with the reinforcement of an intermediate layer of Kevlar((R)) was the best.