COHESIVE CRACK APPROACH TO DEBONDING ANALYSIS

Resumo

Debonding of coatings from substrate due to coating compression occurs in many engineering applications. A simplified analytical approach for the estimation of the ultimate coating compression leading to debonding is developed in this paper, assuming an assigned out-of-plane defect of the coating. The formulation is based on the solution of a beam on a Pasternak (two parameters) elastic foundation, and on the assumption of a Mode I cohesive failure of the coating-substrate interface. The resulting formulas are simple and require the knowledge of a limited number of parameters.

Keywords: Adhesive Joints. Cohesive Model. Coating. Pasternak Foundation.

COCCHETTI, G.; COMI, C.; PEREGO, U. Cohesive crack approach to debonding analysis. Cadernos de Engenharia de Estruturas, São Carlos, v. 12, n. 57, p. 67-80, 2010. ISSN: 1809-5860.