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Impact damage identification in composite laminates using vibration testing
Pérez Martínez, Marco Antonio; Gil Espert, Lluís; Oller Martínez, Sergio Horacio
Universitat Politècnica de Catalunya. Departament de Resistència dels Materials i Estructures en Enginyeria; Universitat Politècnica de Catalunya. LITEM - Laboratori per a la Innovació Tecnològica d'Estructures i Materials; Universitat Politècnica de Catalunya. (MC)2 - Grup de Mecànica Computacional en Medis Continus
Due to the problems arising from impact damage in composite laminates, there is a need to develop fast, accurate, cost-effective and non-destructive testing methods to identify this type of damage at an early stage and thus enhance the service life of composite structures. This paper presents the results of an extensive experimental campaign conducted to investigate the feasibility of using vibration-based methods to identify damages sustained by composite laminates due to low-velocity impacts. The experimental programme included an evaluation of impact damage resistance and tolerance according to ASTM test methods, characterisation of induced damage by ultrasonic testing and quantification of the effects on the vibration response. The damage identification involved the detection, localisation, quantification and estimation of the remaining bearing capacity. Four damage indicators based on modal parameters were assessed by comparing pristine and damaged states. The results allowed for conclusions to be drawn regarding the capability and suitability of each damage indicator, including its ability to detect impact-induced damage, its precision in determining the location of damage, its sensitivity regarding damage extent and pertinent correlations with residual bearing capacity.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria dels materials::Materials compostos
Àrees temàtiques de la UPC::Enginyeria dels materials::Assaig de materials
Composite materials--Testing
Composite materials--Mechanical properties
Composite laminates
Damage identification
Low-velocity impact
Non-destructive evaluation Experimental modal analysis
Compression after impact
Materials compostos -- Propietats mecàniques
Materials compostos -- Proves

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