Compressive mechanical properties of HTPB propellant at low, intermediate, and high strain rates

ABSTRACT Low, intermediate, and high strain rate compression testing (1.7 × 10−4 to 2500 s−1) of the hydroxyl‐terminated polybutadiene (HTPB) propellant at room temperature, were performed using a universal testing machine, a hydraulic testing machine, and a split Hopkinson pressure bar (SHPB), resp...

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Veröffentlicht in:Journal of applied polymer science 2016-06, Vol.133 (23), p.np-n/a
Hauptverfasser: Yang, Long, Xie, Kan, Pei, Jiangfeng, Sui, Xin, Wang, Ningfei
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Sprache:eng
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Zusammenfassung:ABSTRACT Low, intermediate, and high strain rate compression testing (1.7 × 10−4 to 2500 s−1) of the hydroxyl‐terminated polybutadiene (HTPB) propellant at room temperature, were performed using a universal testing machine, a hydraulic testing machine, and a split Hopkinson pressure bar (SHPB), respectively. Results show that the stress linearly increases with strain at each condition; the increasing trend of stress at a given strain with the logarithm of strain rate changes from a linear to an exponential form at 1 s−1. By combining these characteristics, we propose a rate‐dependent constitutive model which is a linearly elastic component as a base model, then multiplied by a rate‐dependent component. Comparison of model with experimental data shows that it can characterize the compressive mechanical properties of HTPB propellant at strain rates from 1.7 × 10−4 to 2500 s−1. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43512.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.43512