Application of Fracture Mechanics to Strength Analysis of Glued Lap Joints

概要

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この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Strength of double lap joints of wood (Lawson cypress) including a glued end butt joint at center was analyzed by applying Fracture Mechanics. Approximate stress analysis was conducted in accordance with Volkersen type theory. Apparent strain energy release rate G^* of the joints was derived from applying the J-integral to the stress components. It was assumed that the apparent strain energy release rate G^* of the joints was propotional to the strain energy release rate G of cracked adhesive joint specimen subjecting to shear force and expressed as G^*=NG. Fracture criterion was assumed that when G^* reached its critical value G^*_c (=NG_C), fracture occured at the right-angled corner of the joints. Experimental results showed good applicability of derived equation on predicting strength of the joints when N was 0.5 and G_c was 0.25 kg・cm/cm^2. A simple but conservative design equation between strength and the half lap length of the joints based on the experimental results and derived equation was proposed.
京都大学の論文
1976-10-30