Comparison of Peel and Lap Shear Bond Strengths for Elastic Joints With and Without Residual Stresses

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Abstract
Debonding energies have been calculated from peel and lap shear experiments on rubber strips bonded together with a pressure-sensitive acrylic adhesive layer. In some cases, one strip was held stretched during bonding, to create joints with built-in stresses. Good agreement was obtained in all cases, provided that elastic strain energy was taken into account, the work of debonding being about 180 J/m2. For thick rubber strips, about 3–4 mm or greater, the strain induced by peel or shear forces was rather small and the assumption of linear elastic behavior was found to be satisfactory. Good agreement was then obtained with the relations derived by Kendall.1,2

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