Analytical Application of Localized Flexibility Method Combined with Finite Element Analysis to Damage Detection of CFRP Laminated Plates

Abstract

This paper presents modal-based structural damage detection. Specifically, we focus on localized flexibility properties that can be deduced from the experimentally determined global flexibility matrix. We describe the damage detection theory that can be viewed a generalized flexibility formulation in three different generalized coordinates, viz., localized or substructural displacement-basis, elemental deformation-basis and element strain-basis. The three localized flexibilities are applied to a CFRP plate having internal damage. The results show that the elemental strain-basis flexibility is the most accurate in detecting the damage of the CFRP laminates.