Buckling instability during the 180°-peeling of brass shim from polychloroprene rubber

Abstract

The 180°-peel adhesion of brass shim firmly bonded to a steel plate with a rubber interlayer has been studied as a function of rubber thickness, t, and test temperature. At low temperatures, peeling occurs via 'normal' interfacial detachment and the peel force increases to a plateau with rubber thickness. At higher temperatures and with larger values of t, compressive forces during peeling become sufficient to cause buckling of the bonded shim behind the major peel front. This causes a segment of predetachment and results in a unique type of stick-slip peeling pattern, in which alternate bands of cohesive and interfacial failure are formed. The instability is in approximate accord with a model assuming the buckling of a column on an elastic foundation.