Modelling of crack propagation through the interfacial region of a SiC/titanium metal matrix composite

Griffin, D., Daadbin, Ali, Datta, Psantu and Burnell-Gray, J. (1995) Modelling of crack propagation through the interfacial region of a SiC/titanium metal matrix composite. Mechanical and corrosion properties. Series A, Key engineering materials, 99-100. pp. 341-346. ISSN 0252 1059

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Abstract

Finite element models of the interfacial region between a silicon carbide fibre and titanium metal matrix have been constructed using the Engineering Mechanics Research Corporation finite element package Display 3 and the Rasna Corporation package Astruct. The distributions of both tensile and shear stresses across the interface have been obtained and an elliptical crack of semi length 1.5 μm introduced. The Young's moduli of fibre and matrix were varied from a nominal value of 360 GPa to 400 GPa for the fibre and 360 GPa to 92.3 GPa for the matrix, the resultant stress distribution showed that increasing fibre moduli dominated interfacial stress distribution, particularly directly in front of the crack tip, and increased the chance of crack propagation into the fibre. The stress intensity factors for a type I crack, in the interfacial region, using the finite element packages Endure and Applied Structure have been calculated and the results compared with theoretical calculations.

Item Type:	Article
Uncontrolled Keywords:	Composite, crack propagation, interface, mathematical models, stress intensity
Subjects:	H100 General Engineering J500 Materials Technology not otherwise specified
Department:	Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User:	Becky Skoyles
Date Deposited:	17 Feb 2015 15:50
Last Modified:	13 Oct 2019 00:22
URI:	http://nrl.northumbria.ac.uk/id/eprint/18739

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