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- Title
Compressive mechanical properties of HTPB propellant at low, intermediate, and high strain rates.
- Authors
Yang, Long; Xie, Kan; Pei, Jiangfeng; Sui, Xin; Wang, Ningfei
- Abstract
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.
- Subjects
SOLID propellants; POLYBUTADIENE; HYDROXYL group; STRAIN rate; MECHANICAL behavior of materials; COMPRESSIVE strength; HOPKINSON bars (Testing)
- Publication
Journal of Applied Polymer Science, 2016, Vol 133, Issue 23, pn/a
- ISSN
0021-8995
- Publication type
Article
- DOI
10.1002/app.43512