保持加载下岩石变形记忆效应时效特征规律研究

doi:10.13722/j.cnki.jrme.2018.1491

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Abstract Deformation memory effect(DME)，as one of basic properties of rocks，has time features. The influence of the loading time(Tc) on DME is one of time effects. Sandstone and two kinds of granite materials were selected to carry out physical experiments under different Tc. The accuracy of memory formation and the magnitude of strain difference were analyzed. Based on the viscoelastic frictional sliding theory of multi-microstructural planes in rocks，a basic memory theoretical model was constructed by using three elements of rocks，and the DME mechanical theory under different Tc was studied. The results show that，with increasing Tc，the accuracy of memory formation of granite and sandstone is obviously improved and the amplitude of strain difference decreases gradually，and that both the accuracy of memory and the amplitude of strain difference tend to remain unchanged when Tc increases to a certain extent. It is put forward that Tc is the optimum creep time when the amplitude of strain difference keeps stable. The variations of the memory formation accuracy and the strain difference amplitude obtained from the proposed theoretical model are consistent with physical experiment results，which means the proposed model based on multi-microstructural planes can describe the macroscopic behaviors of rock DME under different Tc. The research provides an experimental and theoretical basis for the study of rock DME.

Key words： rock mechanics rock deformation memory effect deformation rate analysis time effect loading creep time multi- microstructures frictional sliding

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	Articles by authors
	ZHONG Lingwei1
	2
	WANG Haijun2
	REN Xuhua1
	TANG Lei2
	Ariel Hsieh3
	YIN Jianmin4
	LI Yongsong4

Cite this article:

ZHONG Lingwei1,2,WANG Haijun2, et al. Research on time features of rock deformation memory effect under creep loading[J]. , 2020, 39(2): 228-238.

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http://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2018.1491 OR http://rockmech.whrsm.ac.cn/EN/Y2020/V39/I2/228

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