1990 Volume 76 Issue 3 Pages 469-474
Effect of cure schedule and test temperature on tensile shear adhesion strength was investigated in a S55C high carbon steel/epoxy resin adhesive system, and was discussed the interrelations among shear, tensile and peel adhesion strengths. The results obtained are as follows :
(1) Probability distribution of adhesion shear strength was found to be followed by Weibull distribution.
(2) Shear strength obtained for various heating temperatures and its holding times, tested under 20°C, was divided into three stages in Larson-Miller parameter plot, that is, incomplete adhesion stage I of interface failure, suitable adhesion stage II of cohesive failure and deterioration adhesion stage III of cohesive-interface mixing failure mode.
(3) The test temperature dependence on shear strength having peaks was observed and the fracture mode was cohesive failure below 40°C corresponding to the temperature of a maximum strength, whereas shear strength decreased gradually with the appearance of an interface failure above 40°C.
(4) There lay a positive linear correlation between shear and tensile adhesion strengths, in addition to similar relationship between peel and tensile adhesion strengths.
