Mechanical properties of rock material under dynamic uniaxial tension
LIU Shiqi 1 2, LI Haibo 1, LI Junru 1
1.Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China 2.Dongting Lake Water Recourese Bureau Hunan Government Changsha 410007 China
Abstract：Dynamic direct tensile tests and Brazilian tests of granite were carried out by use of the loading system developed by the authors,with the axial strain rate ranging from 10-5 to 10-1 s-1.Dynamic strength and deformation properties were studied systematically.It was indicated that the tensile strength of rock material increased with the increasing strain rate.The Young’s modulus of the rock also increased with the increasing strain rate,but the increasing rate was less than that of tensile strength.And it was the same for the critical tensile strain.However,the Poisson’s ratio was discrete.In addition,the mechanism of the strain rate effect of the rock material was primarily analyzed.
刘世奇；李海波；李俊如；. 轴向拉伸情况下岩石的动态力学特性试验研究[J]. 岩土工程学报, 2007, 29(12): 1904-1907.
LIU Shiqi 1 2, LI Haibo 1, LI Junru 1. Mechanical properties of rock material under dynamic uniaxial tension. Chinese J. Geot. Eng., 2007, 29(12): 1904-1907.
