A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Crack Initiation and Propagation in Rock
Theories of crack initiation, propagation and bifurcation in perfect solids based on energy equilibrium criteria, elasticity theory considerations and particulate body mechanics are reviewed. Modifications of these and their applicability to rock are discussed. Different testing methods used to study the fracture characteristics of rock are reviewed; a bending method was chosen as most suitable for the purpose. A literature review on the effect of heat treatments on rock weakening are discussed. The principles of a continuous duty, high powered gas laser as a heat source are described. The values of the fracture surface energy were determined for four different geometries of a granite specimen; the results show that if a stable fracture is obtained, the value is independent of geometry. Results of the heat treatment and laser treatment studies on marble and granite show the thermal exposure causes a decrease in the value of ultimate flexural strength because of intergranular and transgranular cracks induced in the specimen. (Author)
Crack Initiation and Propagation in Rock
Theories of crack initiation, propagation and bifurcation in perfect solids based on energy equilibrium criteria, elasticity theory considerations and particulate body mechanics are reviewed. Modifications of these and their applicability to rock are discussed. Different testing methods used to study the fracture characteristics of rock are reviewed; a bending method was chosen as most suitable for the purpose. A literature review on the effect of heat treatments on rock weakening are discussed. The principles of a continuous duty, high powered gas laser as a heat source are described. The values of the fracture surface energy were determined for four different geometries of a granite specimen; the results show that if a stable fracture is obtained, the value is independent of geometry. Results of the heat treatment and laser treatment studies on marble and granite show the thermal exposure causes a decrease in the value of ultimate flexural strength because of intergranular and transgranular cracks induced in the specimen. (Author)
Crack Initiation and Propagation in Rock
P. Forootan-Rad (author) / F. Moavenzadeh (author)
1968
134 pages
Report
No indication
English
Geology & Geophysics , Structural Mechanics , Rock(Geology) , Crack propagation , Theory , Fracture(Mechanics) , Solids , Elasticity , Heat treatment , Gas lasers , Energy , Loading(Mechanics) , Test methods , Cylindrical bodies , Disks , Granite , Bending , Metamorphic rock , Flexural strength , Thermal stresses , Geometry , Bifurcation , Intergranular cracks , Graphs(Charts)
Criterion of crack initiation and propagation in rock
| British Library Conference Proceedings | 2003
Freezing-Driven Crack Initiation and Propagation in Hard Rock
| Springer Verlag | 2025
Identifying crack initiation and propagation thresholds in brittle rock
| British Library Online Contents | 1998
Active Seismic Monitoring of Crack Initiation, Propagation, and Coalescence in Rock
| Online Contents | 2017
Active Seismic Monitoring of Crack Initiation, Propagation, and Coalescence in Rock
| Online Contents | 2017