Resistance to Crack Growth in Fibre Reinforced Cement: Effect of Fibre Properties
Slow stable crack growth is a prominent feature of the fracture behaviour of fibre reinforced cement. The main mechanism for resistance crack growth during crack extension in this type of composite is microcracking ahead of the crack tip. This phenomenon is characteristic of a cement matrix, containing many pre-existing defects which will propagate during loading. Its effects can be calculated by applying linear elastic fracture mechanics to the microcracks. Fibres stabilise the crack propagation as long as they bridge the crack. A statistical study, based on fibre bundle behaviour, allows an explaination of the effect of fibre properties on crack growth resistance in this type of composite.
KeywordsCrack Extension Linear Elastic Fracture Mechanic Damage Zone Cement Matrix Crack Growth Resistance
Unable to display preview. Download preview PDF.
- 1.R. N. Swamy and H. Starrides, “Influence of fibre reinforcement on restrained shrinkage and cracking”. ACI Journal, 76, 3, (1979), 443.Google Scholar
- 3.A.J. Majumdar and V. Laws, “Fibre cement composites: research at BRE”, Composites (Jan. 1979), 17.Google Scholar
- 5.D.J. Hannant, D.C. Hughes and A. Kelly, “Toughening of cement and other brittle solids with fibres”. Phil. Trans. R. Soc. A310.Google Scholar