Micromechanics of interface - Crack arrest by strong long fibers in a brittle matrix
Abstract
The mechanism of the crack arrest in a composite with long fibers is analyzed by using the inclusion method. Fibers suppress a crack opening by a bridging action. Slidings along matrix-fiber interfaces result in energy dissipation. The bridging action reduces the energy release rate G for the crack extension. The energy dissipation due to sliding and interfacial debonding produces additional resistances delta G(s) and delta G(d) to the crack extension. G, delta G(s) and delta G(d) are calculated in terms of external stresses, frictional stresses, the size of a crack, the debonding length, the interface surface energy and the volume fraction of fibers.
- Publication:
-
Microcracking-Induced Damage in Composites
- Pub Date:
- 1990
- Bibcode:
- 1990midc.proc..113Y
- Keywords:
-
- Brittle Materials;
- Crack Arrest;
- Crack Propagation;
- Energy Dissipation;
- Fiber Composites;
- Micromechanics;
- Fiber Volume Fraction;
- Surface Energy;
- Structural Mechanics