: In rock-concrete composites, interface dip angle and roughness govern where cracks form—either penetrating through both materials or forming along the interface. Analytical and Monitoring Techniques
In brittle materials containing pre-existing defects or fissures, failure typically follows a multi-stage process:
: New cracks propagate along the direction of axial stress. As loading continues, these cracks grow and merge with others, leading to unstable failure.
To understand these behaviors, researchers use various tools:
: New cracks often begin at the tips of pre-existing fissures or around holes due to high stress concentrations.
: Failure is primarily caused by tensile or shear cracks developing parallel to the maximum principal stress.
The strength and final fracture pattern of a material are heavily dependent on its geometry and the environment:
: Research on fractured rock-like materials identifies four distinct stages: Prefabricated crack closure. Elastic deformation. Crack generation and propagation (plastic strengthening). Residual bearing. Factors Influencing Failure and Strength