Propagation Process of Delamination and Local Deformation on Metal-Polymer Laminated Materials

概要

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Interaction between delamination and local deformation on a metal-polymer laminated material subjected to uniaxial tension under a plane strain condition is investigated by using a finite-element method. The metal used in this work is aluminum foil assumed as a plastic and the polymer is PET assumed as a viscoplastic. The delamination process is represented as destruction of an adhesive between laminated materials under the specified stress criteria in which the allowable shear stress and normal tensile stress along the interface are prescribed. The results show that delamination at the early deformation is mainly caused by stress concentration around the void modeled by diminishing the stiffness of the element. Local deformation appears in aluminum foil after delamination is rapidly propagated in the relatively large strain field. The failure process induced by the delamination of the adhesive obtained from numerical analyses is found to be in reasonable agreement with the experimental observations.
一般社団法人日本機械学会の論文
1991-04-15