Damage Detection in Fibre Reinforced Ceramic and Metal Matrix Composites by Acoustic Emission


Kaya F.

6th China International Conference on High-Performance Ceramics (CICC-6), Harbin, China, 16 - 19 August 2009, vol.434-435, pp.57-60 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 434-435
  • Doi Number: 10.4028/www.scientific.net/kem.434-435.57
  • City: Harbin
  • Country: China
  • Page Numbers: pp.57-60
  • Keywords: Fibre reinforced composites, damage, acoustic emission, nondestructive evaluation, CRACK OPENING DISPLACEMENT, FATIGUE

Abstract

In this work damage micro-mechanisms of two different types of fibre reinforced composites are investigated by acoustic emission, AE. Ceramic based oxide fibre reinforced mullite matrix composite and metallic based SiC fibre reinforced titanium matrix composites exhibit different fracture mechanisms during loading and AE technique could pinpoint these damage mechanisms based on the AE responses detected simultaneously. The results show that in a ceramic matrix composite, the identification of fibre fracture and matrix cracking requires careful analysis of the AE data as both fibres and matrix break in brittle manner. Whereas the separation of fibre fracture from the ductile tearing of matrix ligaments could be easier in metallic based composites, such as titanium matrix composites.