EFFECT OF SURFACE TOPOGRAPHY ON THE ADHESIVE SHEAR STRENGTH FOR GFRP AND ALUMINUM ALLOY BONDING

Abstract

Abstract: The bonding interface is the weakest place in the bonding of glass fiber reinforced plastic (GFRP)and metal plate. In order to study the effect of metal surface topography on the bonding strength of GFRP and metal plate, different aluminum alloy surface topography was obtained by grinding with different types of sand paper. After grinding, the aluminum alloy was used to prepare single lap joint of GFRP and aluminum alloy by co-curing process. The shear test was carried out to study the relationship between roughness parameters R_c (mean height of profile elements), R_sm (mean width of the profile elements), R_lo (developed length) and shear strength. On this basis, the change trend of shear strength with the ratio of R_sm to R_c is studied. The results show that too rough surface is not conducive to the bonding of GFRP and aluminum alloy. When the ratio of R_sm to R_c is in a reasonable range, the adhesive can fully fill the surface profile of aluminum alloy and R_lo is the main influencing factor of bonding strength.

Key words: bonding strength, GFRP, surface roughness, shear test

CLC Number:

TB332

GUO Feng, SUN Shi-yong, YANG Rui, LI Pan. EFFECT OF SURFACE TOPOGRAPHY ON THE ADHESIVE SHEAR STRENGTH FOR GFRP AND ALUMINUM ALLOY BONDING[J]. Fiber Reinforced Plastics/Composites, 2018, 0(10): 51-55.

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