局所フレキシビリティー法によるCFRP積層材の損傷同定

概要

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This paper presents a method of structural damage detection. Specifically, we focus on the use of localized flexibility properties that can be deduced either from the experimentally determined global flexibility matrix or from a localized structural identification procedure. To this end, first we present the underlying theory that can be viewed a generalized flexibility formulation in three different generalized coordinates, viz., localized or substructural displacement, elemental deformation-basis, and elemental strain basis. It is shown that the three different-basis substructural flexibilities can be related to the measured global flexibility matrix via a nonliner equation. The changes in the substructural flexibilities of nominal and damaged cases are used as localized damage indicators. The present methods are then applied to a damage detection of CFRP laminates.
2000-04-25