By Yingxin Zhou; Jian Zhao
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Extra resources for Advances in rock dynamics and applications
The transmitted bar is 1200 mm long and the stain gauge station is 655 mm away from the sample. An infrared detector system is used together with a two-channel TDS1021 digital oscilloscope to measure the velocity of the striker bar. An eight-channel Sigma digital oscilloscope by Nicolet is used to record and store the strain signals collected from the Wheatstone bridge circuits after amplification. Because the bar diameter is relatively small, it is suitable for testing fine- to medium-grained rocks.
For testing rock materials under high strain rates (102 ∼103 s−1 ), split Hopkinson pressure bar (SHPB) is an ideal dynamic testing machine. As a widely used device to quantify the dynamic compressive response of various metallic materials at high loading or strain rates, SHPB was invented in 1949 by Kolsky (Kolsky, 1949; Kolsky, 1953). Shortly after that, SHPB was attempted by researchers to test brittle materials such as concretes (Ross, Thompson and Tedesco, 1989; Ross, Tedesco and Kuennen, 1995), ceramics (Chen and Ravichandran, 1996; Chen and Ravichandran, 2000) and rocks (Christensen, Swanson and Brown, 1972; Dai, Xia and Tang, 2010).
H. : The strain rate-dependent mechanical properties of marble and its constitutive relation. In: Proceedings of International Conference of Computational Methods in Structural and Geotechnical Engineering, Hong Kong, 1994. F. 341–352. Q. : Dynamic fracture in brittle solids at high rates of loading. 454–457. Q. : On study of influences of loading rate on fractal dimensions of fracture surfaces in gabbro. 235–242. : Development of Micro-macro Continuum-discontinuum Coupled Numerical Method. PhD thesis.
Advances in rock dynamics and applications by Yingxin Zhou; Jian Zhao