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Monitoring the damage state of fiber reinforced composites using an FBG network for failure prediction

Kocaman, Esat Selim and Akay, Erdem and Yılmaz, Çağatay and Türkmen, Halit Süleyman and Mısırlıoğlu, Burç and Suleman, Afzal and Yıldız, Mehmet (2017) Monitoring the damage state of fiber reinforced composites using an FBG network for failure prediction. Materials, 10 (1). ISSN 1996-1944

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Official URL: http://dx.doi.org/10.3390/ma10010032

Abstract

A structural health monitoring (SHM) study of biaxial glass fibre-reinforced epoxy matrix composites under a constant, high strain uniaxial fatigue loading is performed using fibre Bragg grating (FBG) optical sensors embedded in composites at various locations to monitor the evolution of local strains, thereby understanding the damage mechanisms. Concurrently, the temperature changes of the samples during the fatigue test have also been monitored at the same locations. Close to fracture, significant variations in local temperatures and strains are observed, and it is shown that the variations in temperature and strain can be used to predict imminent fracture. It is noted that the latter information cannot be obtained using external strain gages, which underlines the importance of the tracking of local strains internally.

Item Type:Article
Uncontrolled Keywords:polymer-matrix composites; fatigue; mechanical testing; damage monitoring; fibre Bragg grating
Subjects:T Technology > TJ Mechanical engineering and machinery
ID Code:33550
Deposited By:Burç Mısırlıoğlu
Deposited On:09 Sep 2017 13:20
Last Modified:09 Sep 2017 13:20

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