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.
