Monitoring the Damage State of Fiber Reinforced Composites Using an FBG Network for Failure Prediction


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Kocaman E. S., Akay E., Yilmaz Ç., Türkmen H. S., Misirlioglu I. B., Suleman A., ...Daha Fazla

MATERIALS, cilt.10, sa.1, 2017 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 10 Sayı: 1
  • Basım Tarihi: 2017
  • Doi Numarası: 10.3390/ma10010032
  • Dergi Adı: MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: polymer-matrix composites, fatigue, mechanical testing, damage monitoring, fibre Bragg grating, BRAGG GRATING SENSOR, HIGH-CYCLE FATIGUE, POISSONS RATIO, FEASIBILITY, DEGRADATION, ENERGY
  • Abdullah Gül Üniversitesi Adresli: Hayır

Özet

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.