無機接着剤を用いた円柱はめ合わせ接着継手の押抜き接着強度の評価

抄録

Adhesive bonding technique becomes available now for joining the structural parts in various fields. Adhesive joints is also expected to use at high temperature environment. High strength structural adhesives such as the epoxy resin base or polyurethane base adhesives are, however, able to use up to 400qC. Although the inorganic adhesives have heat resistance of 1000qC or more, it is hard and not flexible. So that the strength of the joint is not improved by simply increase the bonded area. The adhesively fitting joint with a rod and a cylinder can be prevented from brittle fracture of the joint. Then, in this research, a push-out test of a rod-cylinder joint bonded with inorganic adhesive was conducted to examine the effect of adhesive thickness and bonding area on the strength of the joint. Stress distributions in the joint under push-out loading were analyzed by a finite element method. It is shown as the results of stress analysis that the maximum stress occurs at the top of adhesive layer near the rod, and the value increase with increasing of the thickness of adhesive layer. The experimental results of the joint push-out strength show the strength decreases as the adhesive thickness increase, and this tendency is good agreement with the prediction based on the stress analysis.