Study on evaluation method of interfacial strength in rubber/metal dissimilar materials joint

Abstract

The 90° peel test has been commonly used to evaluate interfacial strength of rubber/metal dissimilar materials joint. However, peel strength obtained with this testing method might be affected by peel angle between metal and rubber, mechanical properties of the rubber and specimen geometry. In this study, a peel test was conducted by applying a shear force to induce delamination at interface between rubber and metal. In the present study, shear force peel test was carried out with different tool height (distance from the interface) and its effect on shear strength was investigated. In case of higher tool height, bending moment working on rubber became large and resulted in occurrence of normal stress at the interface to induce delamination. In case of that tool height was low, normal stress acting at the interface became relatively low, then crack was initiated and propagated inside rubber but not delamination occurred at the interface.