A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
On assessing the tensile cracking pattern in brittle rocks and solids
https://orcid.org/0000-0001-5024-8790
Abstract This work aims to identify fracture pattern and crack growth mode in brittle rocks and solids under induced tensile stresses, and further investigates how the estimation of material tensile strength is influenced by the fracture mode in the Brazilian test. Using ultra-high-speed photography technique and optical methods at 100 kHz and above, the fracture propagation modes of 450 samples of several materials (including various rock types, ceramic, brittle polymers, concrete, asphalt, and construction bricks) were inspected. The imaging analyses showed eight distinct fracture propagation modes. The peak load recordings as well as the crack initiation point and the crack propagation path were then correlated with each mode of failure. It was observed that the force at failure decreases as the crack initiation point moves towards the contact areas and is formed away from the centre of the specimen; where the maximum horizontal stress is induced in tension. As the material tensile strength increases, the fracture behaviour was observed to be explosion-like in the form of a dominant tensile crack accompanied by multiple large secondary shear fractures that break apart the test specimen into several pieces. From the results, it is suggested that extreme precautions should be taken when the Brazilian test is utilised for testing a brittle solid with a tensile strength of 10 MPa and above for which the standard recommendations are difficult to follow entirely.
On assessing the tensile cracking pattern in brittle rocks and solids
https://orcid.org/0000-0001-5024-8790
Abstract This work aims to identify fracture pattern and crack growth mode in brittle rocks and solids under induced tensile stresses, and further investigates how the estimation of material tensile strength is influenced by the fracture mode in the Brazilian test. Using ultra-high-speed photography technique and optical methods at 100 kHz and above, the fracture propagation modes of 450 samples of several materials (including various rock types, ceramic, brittle polymers, concrete, asphalt, and construction bricks) were inspected. The imaging analyses showed eight distinct fracture propagation modes. The peak load recordings as well as the crack initiation point and the crack propagation path were then correlated with each mode of failure. It was observed that the force at failure decreases as the crack initiation point moves towards the contact areas and is formed away from the centre of the specimen; where the maximum horizontal stress is induced in tension. As the material tensile strength increases, the fracture behaviour was observed to be explosion-like in the form of a dominant tensile crack accompanied by multiple large secondary shear fractures that break apart the test specimen into several pieces. From the results, it is suggested that extreme precautions should be taken when the Brazilian test is utilised for testing a brittle solid with a tensile strength of 10 MPa and above for which the standard recommendations are difficult to follow entirely.
On assessing the tensile cracking pattern in brittle rocks and solids
https://orcid.org/0000-0001-5024-8790
Abstract This work aims to identify fracture pattern and crack growth mode in brittle rocks and solids under induced tensile stresses, and further investigates how the estimation of material tensile strength is influenced by the fracture mode in the Brazilian test. Using ultra-high-speed photography technique and optical methods at 100 kHz and above, the fracture propagation modes of 450 samples of several materials (including various rock types, ceramic, brittle polymers, concrete, asphalt, and construction bricks) were inspected. The imaging analyses showed eight distinct fracture propagation modes. The peak load recordings as well as the crack initiation point and the crack propagation path were then correlated with each mode of failure. It was observed that the force at failure decreases as the crack initiation point moves towards the contact areas and is formed away from the centre of the specimen; where the maximum horizontal stress is induced in tension. As the material tensile strength increases, the fracture behaviour was observed to be explosion-like in the form of a dominant tensile crack accompanied by multiple large secondary shear fractures that break apart the test specimen into several pieces. From the results, it is suggested that extreme precautions should be taken when the Brazilian test is utilised for testing a brittle solid with a tensile strength of 10 MPa and above for which the standard recommendations are difficult to follow entirely.
On assessing the tensile cracking pattern in brittle rocks and solids
Serati, Mehdi (author) / Bahaaddini, Mojtaba (author) / Roshan, Hamid (author) / Zhang, Tian Tian (author) / Bryant, Nicholas (author)
2021
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
Elastic–plastic cracking analysis for brittle–ductile rocks using manifold method
| British Library Online Contents | 2013
Tensile cracking of a brittle conformal coating on a rough substrate
| British Library Online Contents | 2016
Direct Tensile Test on Brittle Rocks with the Newly Developed Centering Apparatus
| British Library Online Contents | 2018
Damage model for brittle elastic solids with unequal tensile and compressive strengths
| British Library Online Contents | 1994