纳米压痕技术在岩石材料中的应用与研究进展

doi:10.13722/j.cnki.jrme.2021.1335

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Abstract As a heterogeneous composite material，the macro properties of rock largely depend on the micro-nano scale structural characteristics of the material. With the popularization and development of nanoindentation technology，the nano-mechanical information of rock materials has been widely reported. In order to understand the research status of nanoindentation technology in rocks，the relevant literature at home and abroad is reviewed. First，the basic principles of applying nanoindentation technology to test the elastic modulus，fracture toughness and creep of rock materials are explained. Then，the sample preparation method and test parameter selection for nanoindentation test are summarized. On this basis，the nanoscale characteristics of common rock materials such as shale，coal，sandstone and mudstone are summarized and classified，and the key factors affecting their nanomechanical parameters are analyzed. The results show that due to its high precision in both force and displacement，nanoindentation can be utilized to extract the localized mechanical properties of individual grains，thereby avoiding the requirement of conventional mechanical testing for the size of the specimen. However，the nanoindentation test has specific requirements for the surface roughness of the sample and the loading and unloading regime，and special rock samples need matching sample preparation methods. In addition，the mineral composition and external environmental have an important influence on the nanomechanical properties of the rock material. Although nanoindentation technology has been widely used，its research in rock materials started relatively late，and it still faces many difficulties in data analysis，multi-scale model building and multi-scale mechanical property transfer.

Key words： rock mechanics nanoindentation micromechanical properties creep fracture toughness

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	Articles by authors
	HE Zhihai1
	2
	NI Yaqian1
	DU Shigui3
	SHI Jinyan4
	JIN Jiaxu5
	ZHAN Peimin6

Cite this article:

HE Zhihai1,2,NI Yaqian1, et al. Application and research progress of nanoindentation technology in rock materials[J]. , 2022, 41(10): 2045-2066.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1335 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/I10/2045

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