接合部のアスペクト比が接着継手の強度におよぼす影響

概要

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The strength of the stepped-lap bonded joints with similar adherends is investigated both analytically and experimentally. The effect of an aspect ratio that is varied by an increase in the overlap length under constant adherend thickness on the joint strength is discussed to establish the practical method of the strength design of adhesive bonding structures. The joints used in this study have adherends of carbon steel, brass and aluminum alloy and adhesive of epoxy resin. The strain and stress distributions under a tensile shear load are analyzed by applying finite element method in the above mentioned joints. This analytical strain distribution shows good agreement with experimental ones. The strength of the joints is predicted by applying the strength laws to the adherend, adhesive and their interfaces. Only in the case of adherends of carbon steel, final fracture strengths of the joints increased with the overlap length. The predicted results are nearly equal to the experimental initial fracture load.
1989-09-25