Mechanical characterization of composite solid rocket propellant based on hydroxy-terminated polybutadiene

• Main Authors: Gligorijević Nikola I., Rodić Vesna Ž., Živković Saša Ž., Pavković Bojan M., Nikolić Momčilo M., Kozomara Stevan M., Subotić Sredoje D.
• Format: Article
• Language: English
• Published: Association of Chemical Engineers of Serbia 2016-01-01
• Series: Hemijska Industrija
• Subjects: composite propellant; viscoelasticity; mechanical characterization; tensile strength; ultimate strain; time-temperature shift factor; relaxation modulus; safety factor; reduced time
• Online Access: http://www.doiserbia.nb.rs/img/doi/0367-598X/2016/0367-598X1500067G.pdf
• ISSN: 0367-598X; 2217-7426

This paper presents the procedure of uniaxial mechanical characterization of composite solid rocket propellant based on hydroxy-terminated polybutadiene (HTPB), whose mechanical properties strongly depend on temperature, strain rate, natural aging and accumulated damage. A method of processing data is presented in order to determine time-temperature shift factor and master curves for tensile strength, ultimate strain and relaxation modulus, depending on reduced time. Functional dependences of these features represent an input for structural analysis of a rocket motor propellant grain. The effects of natural aging on the mechanical properties are also considered. [Projekat Ministarstva nauke Republike Srbije, br. TR 36050: Research and development of unmanned aircraft in support of traffic infrastructure monitoring]