Abstract
In this study, butt joint specimens which have various angles of interface edge (notch type:θ=45.70.80 degrees, cylinder type:θ=90 degrees, protrudent type: θ=100,110.135 degrees) are used for the experiments. Stress and strain distributions at the adhesive interface of these specimens under the critical load are obtained by the elastic finite element analysis with MARC. The apparent adhesive strength increases with increasing interfacial edge angle. This is because that stress concentration at the interfacial edge becomes small for a larger edge angle. On the other hand, the apparent adhesive strength decreases with increasing edge angle for the protrudent type specimen which has no stress concentration. This is because the protrudent area of the specimen takes little load. Adhesive strength increases a little with an increase of loading rate. In the obtained analytical data. Mises stress distribution at interfacial edge is found to be the strength criteria for the adhesive joints strength.
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