岩石动态力学性能试验研究

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Abstract To understand the dynamic mechanical properties of rocks，a series of dynamic shock compression tests were carried out by using 50 mm Hopkinson pressure bar apparatus，with strain rate range from 25.4 to 193.4 s－1. Wave shaping technique was used to smooth pulse load；dynamic stress-strain curves were obtained. Experiment data show that the strength of rock has an obvious strain rate effect. The value of strength increases with increasing strain rate. Compared with static strength of 120 MPa，the maximum dynamic strength is enhanced to 365 MPa at strain rate of 193.4 s－1. With the increase in dynamic load，specimen experiences a process of the generation of internal damage，micro flaw，macro crack，fracturing to nubbins and crushing to pieces. The results are valuable for military structure design.

Key words： rock mechanics Hopkinson bar shock compression dynamic mechanical properties strain rate

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	Articles by authors
	ZHANG Ying
	LI Ming
	WANG Kehui
	CHU Zhe

Cite this article:

ZHANG Ying,LI Ming,WANG Kehui, et al. EXPERIMENTAL STUDY OF DYNAMIC MECHANICAL PROPERTIES OF ROCKS[J]. , 2010, 29(S2): 4153-4158.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/4153

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