Compressive mechanical properties of HTPB propellant at low, intermediate, and high strain rates. Issue 23 (24th February 2016)

• Record Type: Journal Article
• Authors: Yang, Long; Xie, Kan; Pei, Jiangfeng; Sui, Xin; Wang, Ningfei
• Is Part Of: Journal of applied polymer science. Volume 133:Issue 23(2016)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-02-24
• Subjects: composites -- mechanical properties -- properties and characterization; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.43512
• Languages: English
• ISSNs: 0021-8995

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. Abstract :