Analysis of Sandwich DCB Test Specimen Using Vlasov Foundation Model

Abstract

In order to evaluate the debond fracture toughness between face sheet and core in sandwich panel under mode-I type loading, sandwich double cantilever beam (DCB) test is often utilized. To analyze the DCB test specimen considering the elastic deformation of the core, a beam on Winkler foundation model was proposed. However, there has been an argument over the definition of the Winkler foundation property. In this study, the Vlasov foundation model, or more specifically the refined Vlasov method, is applied to analyze the sandwich DCB test specimen. The compliance and the energy release rate of sandwich DCB test specimens calculated using the present method show good agreement with those obtained from finite element analysis.