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Variation of Fracture Characteristics of Hydroxyl-Terminated Polybutadiene (HTPB)-Based Solid Propellants Under Thermal Aging

Authors
Park, Hyun SooKim, Il-hyunChoi, Byoung-Ho
Issue Date
5월-2018
Publisher
KOREAN SOC MECHANICAL ENGINEERS
Keywords
HTPB(Hydroxyl-terminated Polybutadiene); EWF Test(Essential Work of Fracture); Tensile Test; Thermal Aging; Degradation; Solid Propellant; Fracture Toughness
Citation
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A, v.42, no.5, pp.477 - 484
Indexed
SCOPUS
KCI
Journal Title
TRANSACTIONS OF THE KOREAN SOCIETY OF MECHANICAL ENGINEERS A
Volume
42
Number
5
Start Page
477
End Page
484
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/76069
DOI
10.3795/KSME-A.2018.42.5.477
ISSN
1226-4873
Abstract
This study was conducted to investigate the variation of the fracture toughness of hydroxyl-terminated polybutadiene (HTPB) solid propellant. Joint Army Navy NASA Air Force standard tensile tests and essential work of fracture (EWF) tests were carried out using test specimens stored at 20 degrees C and 50 degrees C. In this study, the EWF test results demonstrated that the fracture toughness and crack propagation resistance under plane stress state could be varied due to thermal degradation. The change in key mechanical properties caused by thermal degradation was also examined by the tensile test. The mechanical and fracture properties of the HTPB solid propellant decreased depending on the storage period of the solid propellant. The stability and reliability of the solid propellant were greatly affected by thermal degradation; thus, it is important to monitor the degree of thermal degradation of HTPB solid propellant to ensure proper performance.
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공과대학 (기계공학부)
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