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Dynamic mechanical behaviour of rock-like materials with a flaw under different orientation and infill conditions
https://orcid.org/0000-0002-8254-0064
Abstract The effect of flaw inclination angle on the mechanical behaviour of rock-like specimens containing a pre-existing flaw under different infill conditions is investigated under dynamic loading conditions. A total of 81 split Hopkinson pressure bar (SHPB) compression tests were conducted on the fabricated samples with a single non-persistent flaw. SHPB tests were coupled with high-speed digital image correlation (DIC) to investigate the dynamic fracture process during loading. Three different infill conditions (unfilled, grouted with cement paste, and grouted with epoxy resin) and seven orientations (0–90° with vertical) of the flaw were considered. The maximum dependency on flaw inclination angle was observed for flawed samples with an unfilled flaw. However, this dependency decreased significantly for grouted samples with a shift in the mechanical behaviour of the flawed samples towards intact samples. Minimum strength for the flawed samples was obtained at 30° (with respect to vertical) orientation, due to the coincidence of the flaw with the shear failure plane of intact specimens. Fracturing was found to be highly dependent on the flaw orientation for all infill conditions. Six types of fractures in different modes, having different initiation locations and propagation directions along the samples, were observed depending upon the orientation and infill conditions of the flaw.
Dynamic mechanical behaviour of rock-like materials with a flaw under different orientation and infill conditions
https://orcid.org/0000-0002-8254-0064
Abstract The effect of flaw inclination angle on the mechanical behaviour of rock-like specimens containing a pre-existing flaw under different infill conditions is investigated under dynamic loading conditions. A total of 81 split Hopkinson pressure bar (SHPB) compression tests were conducted on the fabricated samples with a single non-persistent flaw. SHPB tests were coupled with high-speed digital image correlation (DIC) to investigate the dynamic fracture process during loading. Three different infill conditions (unfilled, grouted with cement paste, and grouted with epoxy resin) and seven orientations (0–90° with vertical) of the flaw were considered. The maximum dependency on flaw inclination angle was observed for flawed samples with an unfilled flaw. However, this dependency decreased significantly for grouted samples with a shift in the mechanical behaviour of the flawed samples towards intact samples. Minimum strength for the flawed samples was obtained at 30° (with respect to vertical) orientation, due to the coincidence of the flaw with the shear failure plane of intact specimens. Fracturing was found to be highly dependent on the flaw orientation for all infill conditions. Six types of fractures in different modes, having different initiation locations and propagation directions along the samples, were observed depending upon the orientation and infill conditions of the flaw.
Dynamic mechanical behaviour of rock-like materials with a flaw under different orientation and infill conditions
https://orcid.org/0000-0002-8254-0064
Abstract The effect of flaw inclination angle on the mechanical behaviour of rock-like specimens containing a pre-existing flaw under different infill conditions is investigated under dynamic loading conditions. A total of 81 split Hopkinson pressure bar (SHPB) compression tests were conducted on the fabricated samples with a single non-persistent flaw. SHPB tests were coupled with high-speed digital image correlation (DIC) to investigate the dynamic fracture process during loading. Three different infill conditions (unfilled, grouted with cement paste, and grouted with epoxy resin) and seven orientations (0–90° with vertical) of the flaw were considered. The maximum dependency on flaw inclination angle was observed for flawed samples with an unfilled flaw. However, this dependency decreased significantly for grouted samples with a shift in the mechanical behaviour of the flawed samples towards intact samples. Minimum strength for the flawed samples was obtained at 30° (with respect to vertical) orientation, due to the coincidence of the flaw with the shear failure plane of intact specimens. Fracturing was found to be highly dependent on the flaw orientation for all infill conditions. Six types of fractures in different modes, having different initiation locations and propagation directions along the samples, were observed depending upon the orientation and infill conditions of the flaw.
Dynamic mechanical behaviour of rock-like materials with a flaw under different orientation and infill conditions
Kumar, Sachin (author) / Tiwari, Gaurav (author) / Parameswaran, Venkitanarayanan (author) / Das, Arghya (author)
2023
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
| Elsevier | 2022
Shear behaviour of rock joints with unsaturated infill
| British Library Online Contents | 2013
Shear behaviour of rock joints with unsaturated infill
| Online Contents | 2013