基于巴西劈裂试验的岩石应力–应变曲线荷载速率依存性研究

doi:10.13722/j.cnki.jrme.2016.0596

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Abstract

Loading rate dependency is basic content of rheological mechanics of rock material. Brazilian split tests on Jingkou Sandstone，Emochi andesite and Tage tuff were performed under the condition of alternating loading rate. The Brazilian splitting failure process and the loading rate dependency characters about stress-strain curve of pre-and post-peak were analyzed and the following conclusions were found：(1) In the case of alternating load rate，the Brazil splitting crack first starts from the center of the specimen and gradually extends to the two ends of the split face，and the failure process can be divided into four stages. (2) The stress-strain curve of Brazil splitting test，which is obtained by the high and low alternating load rate test，can clearly observe the characteristic of the load rate dependence of rock at pre-and post-peak stage. (3) The splitting strength of rock in Brazil increased with the increase of loading rate，and showed a significant dependence on the load rate. By calculating the loading rate dependence coefficient n value，quantitative analysis about loading rate dependence of the three rocks was performed.

Key words： rock mechanics rock material the Brazilian spitting test alternating loading rate loading rate dependency

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	Articles by authors
	PENG Shoujian1
	2
	CHEN Cancan1
	XU Jiang1
	ZHANG Hailong1
	3
	TANG Yang1
	NIE Wen1
	4
	ZHAO Kai1

Cite this article:

PENG Shoujian1,2,CHEN Cancan1, et al. Loading rate dependency of rock stress-strain curve based on Brazil splitting test[J]. , 2018, 37(S1): 3247-3252.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2016.0596 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/IS1/3247

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