Interlaminar Stress Concentrations in Layered Structures:Part I - A Selective Literature Survey on the Free-Edge Effect since 1967

摘要

Stress concentration phenomena in composite laminates are technically important situations.A well-known problem of this class is the free-edge effect in composite laminates or as a superordinated example the stress concentrations in the vicinity of free laminate corners(so-called free-corner effect).The present work is split into two parts.In the present contribution,after a short introduction to the given stress concentration problems in general we will survey relevant selected literature on the classical free-edge effect dating from 1967 until today.Beside accentuation on approximate closed-form analytic methods for the stress analysis in the free-edge effect situation,numerous references on numerical methods and investigations on the occurring stress singularities are also cited.In a subsequent paper we will present a simple closed-form method for the analysis of the stress fields in the vicinity of free laminate corners with arbitrary layup.The method is based on adequate stress shape assumptions and a variational principle.The present article contains 136 references.