Investigation on the mechanical properties of shale subjected to different conditions based on nanoindentation experiments and numerical simulation

Shankun Zhao; Xiaowei Xu; Liu Yang; Kai Qin; Xiang Yu; Qian Chao; Nan Zhou; Jianping Zuo

doi:10.1016/j.cscm.2022.e01438

Case Studies in Construction Materials (Dec 2022)

Investigation on the mechanical properties of shale subjected to different conditions based on nanoindentation experiments and numerical simulation

Shankun Zhao,
Xiaowei Xu,
Liu Yang,
Kai Qin,
Xiang Yu,
Qian Chao,
Nan Zhou,
Jianping Zuo

Affiliations

Shankun Zhao: Mine Safety Technology Branch of China Coal Research Institute, Beijing 100013, China; School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Xiaowei Xu: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Liu Yang: State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Kai Qin: Mine Safety Technology Branch of China Coal Research Institute, Beijing 100013, China
Xiang Yu: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Qian Chao: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Nan Zhou: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
Jianping Zuo: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Beijing 100083, China; Corresponding author at: School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China.

DOI: https://doi.org/10.1016/j.cscm.2022.e01438
Journal volume & issue: Vol. 17
p. e01438

Abstract

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Nano indentation has become an important means to study the mechanical properties of rock because of its nondestructive and high efficiency. In this work, the Weibull distribution function is used to statistically analyze the nanoindentation test results and to analyze them mechanically and parametrically. The indentation process was simulated using ABAQUS to investigate the effect of semi-through cracks at the indentation on the indentation results. The experimental and simulated results were also analyzed using the dimensional analysis method. The results show that the elastic modulus, hardness and fracture toughness are positively correlated. The correlation between hardness and fracture toughness is poor. In the simulated indentation experiment, the number, depth, distance and Angle of semi-penetrating cracks have different effects on the indentation results. The proportional coefficients of dimensional analysis fitting curves are 0.464, 0.464, 0.457 and 0.462, respectively, which means that the number and depth of cracks have a great influence on the experimental results.

Published in Case Studies in Construction Materials

ISSN: 2214-5095 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/case-studies-in-construction-materials

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