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http://dx.doi.org/10.6108/KSPE.2012.16.4.033

Estimation of Shelf Life for Propellant KM6 by Using Gamma Process Model  

Park, Sung-Ho (국방과학연구소 종합시험단)
Kim, Jae-Hoon (충남대학교 기계설계공학과)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.16, no.4, 2012 , pp. 33-41 More about this Journal
Abstract
The aim of the study is to investigate the method to estimate a shelf life of KM6 single base propellant by stochastic gamma process model. The state failure level is assumed that the degradation content of stabilizer is below 0.8%. The constant of time dependent shape function and the scale parameter of stationary gamma process are estimated by moment method. The state distribution at each storage time can be shown from probability density function of deterioration. It is estimated that the $B_{10}$ life, a time at which the cumulative failure probability is 10%, is 25 years and the $B_{50}$ life is 36 years from cumulative failure distribution function curve. The $B_{50}$ life can be treated as the average shelf life from the practical viewpoint and the lifetime can be expressed as distribution curve by using stochastic process theory.
Keywords
Propellant; Gamma Process; Stabilizer; State Failure; Moment Method; Shelf Life;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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