Crack resistance curve in glass matrix composite reinforced by long Nicalon® fibres
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Theoretical micromechanical analysis of bridged crack development at chevron-notch tip of three-point bend specimens has been applied to determine the crack resistance curve for a composite made of a glass matrix reinforced by continuous Nicalon® fibres. Fracture toughness (KIC) values were determined using the chevron-notch technique at room temperature. The theoretical predictions were based on micromechanical analysis exploiting weight functions. Detailed FEM analysis using the ANSYS package was applied to determine numerically the weight functions for orthotropic materials. Appropriate bridging models for the theoretical prediction of the R-curve behaviour typical of the investigated composite were applied together with the weight functions. Experimental observations confirmed the theoretical calculations.
KeywordsStress Intensity Factor Acoustic Emission Event Weibull Modulus Frictional Shear Stress Glass Matrix Composite
The research was supported by the Czech Science Foundation under grant numbers 106/05/0495 and 106/06/0724 is gratefully acknowledged.
- 1.Chawla KK (1993) Ceramic matrix composites. Chapman and Hall, LondonGoogle Scholar
- 2.Boccaccini AR, Rawlings RD (2002) Glass Technol 43C:191Google Scholar
- 4.Rawlings RD (2001) Brittleness—a tough problem. In: Pashley DW (ed) Imperial College inaugural lectures in materials science and materials engineering. Imperial College Press, London, pp 153–197, ISBN: 1-8609-4106-0Google Scholar
- 5.Akatsu T, Yasuda E, Sakai M (1996) Fract Mech 11:245Google Scholar
- 12.Kotoul M, Vyslouzil T, Dlouhy I (2005) In: Aliabadi MH et al (eds) Proceedings of advances in fracture and damage mechanics IV. EC Ltd, UK, pp 217Google Scholar
- 15.Dlouhy I, Reinisch M, Boccaccini AR (2002) Fracture toughness and work of fracture of SiC fibre reinforced glass matrix composite, Fracture mechanics of ceramics, crack/microstructure interaction, R-curve behaviour. Kluwer, pp 203Google Scholar
- 16.Dlouhy I, Holzmann M, Man J, Valka L (1994) Metall Mater 32:3Google Scholar
- 18.Tada H, Paris P, Irwin GR (1985) The stress analysis of cracks handbook. Del Research, St LouisGoogle Scholar