Journal of the Korean Society of Propulsion Engineers (한국추진공학회지)

The Korean Society of Propulsion Engineers (한국추진공학회)
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Natural Aging Properties Analysis of HTPB Propellant

HTPB계 고체추진제의 자연노화 물성 분석

  • Park, Jung-Ho (Propulsion Center, Hanwha Corporation) ;
  • Ryu, Nam-Sun (Propulsion Center, Hanwha Corporation) ;
  • Park, Jae-Beom (The 4th R&D Institute - 1st Directorate, Agency for Defence Development) ;
  • Jung, Gyoo-Dong (The 4th R&D Institute - 1st Directorate, Agency for Defence Development)
  • Received : 2018.06.18
  • Accepted : 2018.11.28
  • Published : 2019.02.01
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Abstract

Hydroxy-terminated polybutadiene (HTPB) propellants of solid rocket motors age differently under different storage temperatures. The shelf life of a solid rocket motor depends on the aging ratio of the HTPB propellant; it can be estimated through the viscoelastic properties by an aging test. This study analyzed the initial and natural aging properties during long-term storage. The initial properties were obtained from characterization and accelerated test results. The test results were obtained by analyzing the strain on cylindrical grains when a thermal load was applied.

고체 추진기관의 HTPB 추진제는 저장소에서 저장소 환경에 따라 물리적, 화학적 노화가 진행된다. 추진기관 수명은 HTPB 추진제의 노화도에 의해 결정되며, 생산 초기에 점탄성 특성 및 노화 시험을 통해 예측된다. 본 논문에서는 생산 초기 물성 및 가속노화 시험을 통해 획득한 노화 물성과 장기 저장되어 자연 노화된 물성을 비교 분석하였다. 획득된 초기 및 노화물성 결과를 적용하여 중공형 그레인의 온도 하중에 의한 변형율을 분석하였다.

Keywords

References

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