Journal of the Korea Institute of Military Science and Technology (한국군사과학기술학회지)

The Korea Institute of Military Science and Technology (한국군사과학기술학회)
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Storage Life Estimation of Magnesium Flare Material for 81 mm Illuminating Projectile

81 mm 조명탄용 마그네슘계 조명제 저장수명 예측

  • Back, Seungjun (Department of Mechanical & Automotive Engineering, Andong National University) ;
  • Son, Youngkap (Department of Mechanical & Automotive Engineering, Andong National University) ;
  • Lim, Sunghwan (Quality Assurance 1 Team, Hanwha Co., Ltd.) ;
  • Myung, Inho (Daejeon Center, Defense Agency for Technology and Quality)
  • 백승준 (국립안동대학교 기계자동차공학과) ;
  • 손영갑 (국립안동대학교 기계자동차공학과) ;
  • 임성환 ((주)한화 여수사업장) ;
  • 명인호 (국방기술품질원 대전센터)
  • Received : 2014.11.17
  • Accepted : 2015.05.22
  • Published : 2015.06.05
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Abstract

It is necessary to both analyze root-cause of non-conformance of effective illumination time to the specification, and estimate the storage lifetime for 81 mm illuminating projectile stockpiled over 10 years. In this paper, aging mechanism of magnesium flare material due to long-term storage was supposed, and two-stage tests, pre-test and main test based on accelerated degradation tests were performed. Field storage environment of moistureproof was set up, and illumination times in the accelerated degradation tests for temperatures 60 and $70^{\circ}C$ were measured. Then, storage reliability of the projectile was estimated through analyzing the measured data and applying distribution-based degradation models to the data. The $B_{10}$ life by which 10 % of a population of the projectiles will have failed at storage temperature of $25^{\circ}C$ was estimated about 7 years.

Keywords

References

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