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J. KIMS Technol > Volume 18(3); 2015 > Article
Journal of the Korea Institute of Military Science and Technology 2015;18(3):267-274.
DOI: https://doi.org/10.9766/KIMST.2015.18.3.267   
Storage Life Estimation of Magnesium Flare Material for 81 mm Illuminating Projectile
Seungjun Back, Youngkap Son, Sunghwan Lim, Inho Myung
1Department of Mechanical & Automotive Engineering, Andong National University
2Quality Assurance 1 Team, Hanwha Co., Ltd.
3Daejeon Center, Defense Agency for Technology and Quality
81 mm 조명탄용 마그네슘계 조명제 저장수명 예측
백승준, 손영갑, 임성환, 명인호
1국립안동대학교 기계자동차공학과
2(주)한화 여수사업장
3국방기술품질원 대전센터
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.
Key Words: Storage Lifetime, Flare Material, Illuminating Projectile, Degradation, Reliability, Accelerated Degradation Test


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