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Misalignment Tolerance in One-side and Symmetric Loading Hopkinson Pressure Bar Experiments

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Abstract

The split-Hopkinson pressure bar (SHPB) is a widely used experimental technique for studying the mechanical properties of materials at high strain rates. There are two kinds of loading methods applied in the SHPB technique, namely one-side loading and symmetric loading. However, the experimental accuracy of the two loading methods is affected by the interface contact. The present study focused on the inadequate contact caused by the misalignment of the pressure bars. The commercial software ABAQUS was used for simulations. The result shows that the inadequate contact caused by the alignment of the bars has a non-negligible effect on the calculated results. Compared with the one-side loading Hopkinson pressure bar, the symmetric loading Hopkinson pressure bar has a more relaxed requirement for the alignment of the bars. The conclusion arrived at in this paper can help researchers to make a reasonable choice between one-side and symmetric loading Hopkinson pressure bars according to actual requirements.

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Acknowledgements

This work was supported by the Natural Science Foundation of Shannxi Province, China (2021JQ-947), and the China Postdoctoral Science Fund (2019M653785). The author Dr. Cao is very grateful for the support received from the Young Scientists Fund of the National Natural Science Foundation of China [grant number 51904332] and Natural Science Foundation of Shannxi Province, China [grant number 2020JQ-934].

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Authors and Affiliations

  1. Institute of Safety Assessment and Integrity, State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Tubular Goods Research Center of CNPC, Xi’an, 710077, China

    Hailiang Nie, Weifeng Ma, Ke Wang, Junjie Ren, Jun Cao & Wei Dang

  2. Northwestern Polytechnical University, Xi’an, 710072, China

    Hailiang Nie

  3. PetroChina Beijing Natural Gas Pipeline Co., Ltd., Beijing, 100001, China

    Xueliang He

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  1. Hailiang Nie
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  2. Weifeng Ma
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  7. Wei Dang
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Correspondence to Hailiang Nie.

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Nie, H., Ma, W., He, X. et al. Misalignment Tolerance in One-side and Symmetric Loading Hopkinson Pressure Bar Experiments. Acta Mech. Solida Sin. 35, 273–281 (2022). https://doi.org/10.1007/s10338-021-00267-3

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  • DOI: https://doi.org/10.1007/s10338-021-00267-3

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