Jian Zhao

TL;DR: A review of the development and the state of the art in dynamic testing techniques and dynamic mechanical behaviour of rock materials can be found in this article, where a detailed description of various dynamic mechanical properties (e.g., uniaxial and triaxial compressive strength, tensile strength, shear strength and fracture toughness) and corresponding fracture behaviour are discussed.

TL;DR: The properties of rocks under dynamic loading are important for the study of a whole range of rock mechanics and rock engineering problems, including blasting, protective design, explosives storage, rock bursts and seismic events as discussed by the authors.

TL;DR: In this article, a large diameter split Hopkinson pressure bar (SHPB) was used to obtain the complete stress-strain relationship of the Bukit Timah granite at medium strain rate.

TL;DR: A detailed experimental procedure for the quantitative determination of mechanical properties and full-field strain measurement of rock material under dynamic loads was presented in this paper, where three kinds of testing methods, i.e., notched semi-circular bending, Brazilian disc, and uniaxial compression, were conducted using a split Hopkinson pressure bar (SHPB) system.

TL;DR: Wang et al. as mentioned in this paper proposed a rock mass conceptual model that identifies the effect of rock mass properties on TBM penetration rate by performing a nonlinear regression analysis, and the parametric studies of the new model showed that the rock uniaxial compressive strength and the volumetric joint count have predominantly effects on the penetration rate.