Dynamic Characteristics of Granite Subjected to Intermediate Loading Rate

By Xibing Li, T. Lok, Jian Zhao. 2005

507 citations recorded by the source corpus.

SummaryA large diameter split Hopkinson pressure bar (SHPB) has been developed. This equipment is briefly described, together with a shaped striker that initiates a half-sine incident waveform to obtain the complete stress-strain relationship of the Bukit Timah granite at medium strain rate. Good constant strain rate was derived, and the dynamic complete stress-strain curves and energy absorption of the granite were measured at a strain rate between 20 and 60 per second. Repeated impact between 60–90% of the static strength of the granite was also conducted. Results from the tests show that the cumulative damage of the granite depends on the peak stress of the dynamic loads with a fixed duration. The dynamic fracture strength of the granite loaded at medium strain rate is directly proportional to the cube root of the strain rate. For the granite loaded at this strain rate, Young’s modulus is unchanged. Energy absorption of the samples loading to fragmentation determined its fragmented size distribution. At high strain rate, the rock possesses large energy absorption and the particle size of the fragments is much smaller.

Subfields: Civil and Structural Engineering, Materials Chemistry, Mechanics of Materials

View Paper: https://www.semanticscholar.org/paper/c2e4aee3269dfb336c36781b2c37d74695d2f74a

How researchers see this paper

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In Civil and Structural Engineering

1. Qianbing Zhang
2. Jian Zhao
3. Zilong Zhou
4. Q. Zhang
5. Y. Zou
6. Xibing Li
7. J. Zhao

In Materials Chemistry

1. Qianbing Zhang
2. Jian Zhao
3. Zilong Zhou
4. Xibing Li
5. Q. Zhang
6. J. Zhao
7. Y. Zou
8. Feng Dai

In Mechanics of Materials

1. Qianbing Zhang
2. Jian Zhao
3. Xibing Li
4. Q. Zhang
5. Zilong Zhou
6. J. Zhao
7. Y. Zou
8. Feng Dai

Citations in the corpus

• A Review of Dynamic Experimental Techniques and Mechanical Behaviour of Rock Materials (2014, methodology): “2008), (2) a very large-diameter (from 50 to 100 mm) bar (Li et al. 2005; Albertini et al. 1999) and (3) a ‘slow bar’ technique (Zhao and Gary 1997).”
• Quasi-static and dynamic fracture behaviour of rock materials: phenomena and mechanisms (2014, background): “Some attempts have been made in uniaxial compression (Li et al. 2005; Lundberg 1976), fracture toughness (Chen et al.”
• Determination of mechanical properties and full-field strain measurements of rock material under dynamic loads (2013, methodology): “Two kinds of pulse shaping techniques, the pulse shaper [24] and a cone-shaped striker [5,25,26], have been used to reduce wave dispersion effect and overcome premature failure of specimen using traditional SHPB [27].”
• Numerical Simulation of the Rock SHPB Test with a Special Shape Striker Based on the Discrete Element Method (2014, methodology): “It is quite similar to the experimental waveform without an apparent dispersion phenomenon (Li et al. 2005; Zhou et al. 2010).”