... joint was measured in different directions using a laser profilometer [3]. Fractal based two stationary roughness parameters and a non-stationary roughness parameter are used to quantify anisotropic roughness [3]. A plaster of Paris based model material was used to make model material replicas...

... relationship in testing small rock specimens in laboratory. To overcome the problem, the strength-shape relationship was investigated by a new physical model keeping all internal and external factors affecting the compressive strength of model material constant [3]. The strength and failure mechanism of square...