Experimental Investigation of Temperature and Cork filler on The Strength of Tubular Adhesive Joint Under Pure Shear Stress

Abstract

The current study presented the combined effects of cork powder and temperature on the strength of tubular adhesive joints under pure mode-II failure. CPVC/Steel and PVC/Steel were two different layouts for joints. Epoxy Araldite-LY-556 and hardener AD-22962 were used as adhesive material, while cork powder was used as filler. Cork powder was added to adhesive material with 0 wt.%, 0.25 wt.%, 0.50 wt.%, 0.75 wt.% and 1 wt.%. Experiment was carried out at four different temperatures of 25ºC, 50ºC, 75ºC and 100ºC. Three samples were prepared for each configuration. Adhesive joints were cured at 100ºC for two hours. Experiments were carried out on universal testing machine (UTM) under tensile loading. Results shows that for CPVC/steel joint layout overall toughness of joint increases with addition of cork filler, but the failure load decreases with increasing cork filler concentration and temperature. Even though the effects of cork powder remain presented at elevated temperature. Average failure load increased for 0.25 wt.% cork powder at 50ºC when compared with failure load of neat adhesive joint for CPVC/steel joint layout. For PVC/steel joint layout it has been observed that highest failure load achieved for neat adhesive at 25-degrees temperature. While the strength of PVC/steel joint decreases with increase in temperature and cork concentration.