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Indentation Characteristics Using Various Indenters: A Study Based on Laboratory and Numerical Tests

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Abstract

Laboratory and numerical indentations, using wedge-shaped, spherical and blunt indenters, were performed. The laboratory and numerical results agreed well that fluctuations of the indentation force occurred after the peaks. In addition, indentations by the wedge-shaped indenter generated median cracks whereas, for the spherical and blunt indenters, median and lateral cracks formed. We inferred from the numerical study that the fluctuations correlate to the crack propagation. In addition, the subsequently concentrated tensile stress zones are responsible for the generation of the median and lateral cracks, caused by spherical and blunt indenters. However, for the wedge-shaped indenter, the tensile concentrated zone, forming at the early indentation stage, can cause the median crack.

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Acknowledgements

The authors would like to acknowledge these financial supports: Projects (51804110) supported by the National Natural Science Foundation of China, the China Postdoctoral Science Foundation (2017M612557), Scientific Research Foundation of Hunan Province Education Department (18A345, 18B391) and the Project Supported by Natural Science Basic Research Plan in Shanxi Province of China (S2018-JC-QN-1500).

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Authors and Affiliations

  1. Department of Building Engineering, Hunan Institute of Engineering, 88th Fuxing Road, Xiangtan, China

    Jie Liu & Jun Wang

  2. School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Taoyuan Road, Xiangtan, Hunan, China

    Jie Liu, Wen Wan & Senlin Xie

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  1. Jie Liu
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  2. Wen Wan
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  3. Senlin Xie
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  4. Jun Wang
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Correspondence to Jie Liu.

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Liu, J., Wan, W., Xie, S. et al. Indentation Characteristics Using Various Indenters: A Study Based on Laboratory and Numerical Tests. Geotech Geol Eng 37, 4919–4931 (2019). https://doi.org/10.1007/s10706-019-00952-8

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  • DOI: https://doi.org/10.1007/s10706-019-00952-8

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