A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
On Anisotropic Fracture Evolution and Energy Mechanism During Marble Failure Under Uniaxial Deformation
Abstract In this work, uniaxial compressive strength test combined with AE monitoring and post-test CT scanning techniques were performed to investigate the influence of interbed orientation on the mechanical properties, energy evolution and fracture pattern of anisotropic marble obtained from Lilou iron mine. The marble samples were cored along angles of 0°, 15°, 30°, 45°, 60°, and 90° with respect to the interbeds. The experimental results suggested that the interbed structure in marble have a significant influence on the geomechanical properties, AE pattern, dissipated and released energy, and crack pattern. The stress–strain behaviors present anisotropy and they show “U” shape against interbed orientation. The AE events, dissipated energy and released energy first decreases and then increases with increasing orientation, they get to the minimum for the sample with an interbed orientation of 30°. Post-test CT scanning and macroscopic fracture morphology description reveal the crack morphology and the reason of energy anisotropy. The final failure morphology is the external expression of energy dissipation and release, crack pattern is the simplest for the 30° orientation sample. The most striking founding is that it is the crack tortuosity degree not the crack number that determines the energy dissipation and release characteristics. For the sample with curved crack after failure, the released energy is much more than samples with straight cracks. The experimental results in this work prove the importance of interbed structure on the anisotropic mechanical responses and energy mechanism, fracture evolution is structure dependent.
On Anisotropic Fracture Evolution and Energy Mechanism During Marble Failure Under Uniaxial Deformation
Abstract In this work, uniaxial compressive strength test combined with AE monitoring and post-test CT scanning techniques were performed to investigate the influence of interbed orientation on the mechanical properties, energy evolution and fracture pattern of anisotropic marble obtained from Lilou iron mine. The marble samples were cored along angles of 0°, 15°, 30°, 45°, 60°, and 90° with respect to the interbeds. The experimental results suggested that the interbed structure in marble have a significant influence on the geomechanical properties, AE pattern, dissipated and released energy, and crack pattern. The stress–strain behaviors present anisotropy and they show “U” shape against interbed orientation. The AE events, dissipated energy and released energy first decreases and then increases with increasing orientation, they get to the minimum for the sample with an interbed orientation of 30°. Post-test CT scanning and macroscopic fracture morphology description reveal the crack morphology and the reason of energy anisotropy. The final failure morphology is the external expression of energy dissipation and release, crack pattern is the simplest for the 30° orientation sample. The most striking founding is that it is the crack tortuosity degree not the crack number that determines the energy dissipation and release characteristics. For the sample with curved crack after failure, the released energy is much more than samples with straight cracks. The experimental results in this work prove the importance of interbed structure on the anisotropic mechanical responses and energy mechanism, fracture evolution is structure dependent.
On Anisotropic Fracture Evolution and Energy Mechanism During Marble Failure Under Uniaxial Deformation
Wang, Y. (author) / Tan, W. H. (author) / Liu, D. Q. (author) / Hou, Z. Q. (author) / Li, C. H. (author)
2019
Article (Journal)
Electronic Resource
English
BKL:
38.58
Geomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB41
| British Library Online Contents | 2017
| British Library Online Contents | 2017