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The Exponential Law Between Dwell Time and the Strength of PBX Substitute Material

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Abstract

Polymer-bonded sugars (PBSs) can be used as a substitute material for polymer-bonded explosives (PBXs) due to their ability to simulate the mechanical properties of PBXs. In the process of pressing a PBS, the length of the dwell time has a significant impact on the mechanical properties of the PBS. This reinforcing effect is based on the residual pressure causing the binder to flow and gradually fill each defect. Through the use of Darcy’s principle of binder infiltration and viscoelastic theory, an exponential relationship between the compressive strength of PBS and the dwell time has been derived. From the experiments, it was found that the extreme forces that correspond to the compaction stage of the PBS samples with different dwell times were almost the same; this indicates that there is tolerance to damage during the compaction stage. The existence of the compaction stage is related to the brittleness of the PBS. The experimental results showed that as the dwell time increased, the rate of damage evolution of the specimen decreased.

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Acknowledgements

The authors would like to acknowledge the financial support by NSAF (U133010) and NSFC (11472141), and K. C. Wong Magna Fund in Ningbo University.

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Authors and Affiliations

  1. The Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, 315211, China

    Yizhan Yang, Hangjie Lv & Jiankang Chen

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  1. Yizhan Yang
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  2. Hangjie Lv
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Correspondence to Jiankang Chen.

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Yang, Y., Lv, H. & Chen, J. The Exponential Law Between Dwell Time and the Strength of PBX Substitute Material. Acta Mech. Solida Sin. 34, 204–220 (2021). https://doi.org/10.1007/s10338-020-00184-x

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  • DOI: https://doi.org/10.1007/s10338-020-00184-x

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