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Technique for Combined Dynamic Compression–Shear Testing of PBXs

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Abstract

We modify the split Hopkinson pressure bar and propose a compression–shear experimental method to investigate the dynamic behavior of polymer-bonded explosives (PBXs). The main apparatuses used include an incident bar with a wedge-shaped end and two transmission bars. We employ Y-cut quartzes with a rotation angle of 17.7° to measure the shear force and an optical system for shear strain measurement. A PBX with a density of 1.7 g/cm3 is investigated using the proposed method. Experimental results show that the specimen endures both compression and shear failure. Compression failure stress rises, and shear failure stress decreases as the strain rate increases. The sequences of shear and compression failure times are various at different strain rates. Based on the maximum shear failure criterion, we conclude that these phenomena are related to the experimental loading path.

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Acknowledgement

This work was supported by the Natural Science Foundation of China (NSFC) through Grant No. 10872215, 10902122 and 10902100. And we would like to acknowledge the support of NUDT Foundation under grant No. JC110217, JC110218.

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Authors and Affiliations

  1. College of Science, National University of Defense Technology, 410073, Changsha, China

    P. D. Zhao, F. Y. Lu, Y. L. Lin, R. Chen & J. L. Li

  2. College of Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, China

    L. Lu

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  1. P. D. Zhao
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  2. F. Y. Lu
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  3. Y. L. Lin
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  4. R. Chen
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  5. J. L. Li
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Correspondence to F. Y. Lu.

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Zhao, P.D., Lu, F.Y., Lin, Y.L. et al. Technique for Combined Dynamic Compression–Shear Testing of PBXs. Exp Mech 52, 205–213 (2012). https://doi.org/10.1007/s11340-011-9534-8

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  • DOI: https://doi.org/10.1007/s11340-011-9534-8

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