樹脂積層材の界面はく離伝ぱと母材局所変形挙動の解析

概要

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Interaction between delamination and local deformation on a metal-polymer laminated material subjected to tension under plane-strain conditions is investigated numerically using a finite element method. The metal modelled is an Al alloy assumed to be plastic and the polymer is a PET to be viscoplastic. The delamination process is modelled as the destruction of the adhesive between laminated materials under the specified stress criteria in which the allowable shearing stress along the interface and positive normal stress perpendicular to the interface are prescribed. The results show that delamination at the early deformation is mainly caused by stress concentration around the void which is modelled by diminishing the stiffness of the element satisfied with this criteria. Local deformation starts in the metal after delamination is rapidly propagated at the relatively large strain field. The failure process from delamination of adhesive obtained from numerical analyses is found to be in reasonable agreement with experimental observations.
一般社団法人日本機械学会の論文
1990-02-25