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Monitoring the effects of impact damages on modal parameters in carbon fiber entangled sandwich beams

Shahdin, Amir and Mezeix, Laurent and Bouvet, Christophe and Morlier, Joseph and Gourinat, Yves Monitoring the effects of impact damages on modal parameters in carbon fiber entangled sandwich beams. (2009) Engineering Structures, vol. 31 (n° 12). pp. 2833-2841. ISSN 0141-0296

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Official URL: http://dx.doi.org/10.1016/j.engstruct.2009.07.008

Abstract

The aim is to study the impact toughness of two types of entangled sandwich materials (heavy and light) with the help of vibration testing. A simple case of symmetrical impacts is studied in this article as no literature is available regarding impact tests on entangled sandwich materials. The variation of modal parameters with two levels of damage (BVID and Damage not apparent on the surface) is studied. Vibration test results show that the light entangled specimens possessing good damping capabilities seem more sensitive to impact damage than the heavy ones. Furthermore, damping is found to be more sensitive to damage than the stiffness variations, so it is reasonable to assume that damping may be used instead of natural frequency as a damage indicator tool for structural health monitoring purposes.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Elsevier website : http://dx.doi.org/10.1016/j.engstruct.2009.07.008
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By: Yves GOURINAT

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