Internal damage growth is quasi-brittle fibre-reinforced cementitious materials under cyclic compressive loading
- Vol.49(5), Dec-Jan
- Chennai CSIR- Strctural Engineering research Centre 2022-23
- 373-384p.
This article reports a comparison between the internal damage growth in cementitious materials without fibres and with fibres subjected to elevated amplitude cyclic compressive loading. The damage progression was assessed using ultrasonic testing method and acoustic emission (AE) testing. The intricate fracture mechanism in the test specimens causes rise to a higher harmonic generation, which was used as an indicator to the internal damage. The decrement in wave peak amplitude with higher harmonic generation may be regarded as a 'internal damge growth' in the deformable solid. The complexity in the fracture mechanism in fibrous cementitious matrix influenced the heterogeneity of the specimen, which is reflected by the steep decrement in the slope of the line.