Service life expectancy of grain is estimated by calculating age at which grain structural margin of safety becomes zero; stiffness and strength data were obtained from four aged operational motors; stress analyses of grain were made which yielded margin of safety at each motor age; this was then extrapolated to zero to estimate service life; using Monte Carlo simulation parameters affecting margin of safety (propellant stiffness, propellant strength, case stiffness, and internal pressure) were randomly selected; result was probability distribution of margin of safety which was extrapolated to zero for service life prediction.
Statistical service life prediction -- Minuteman third-stage propellant grain
J Spacecraft Rockets
Journal of Spacecraft and Rockets ; 5 , n 1
1968
5 pages
Article (Journal)
English
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Propellant Surveillance Report, MINUTEMAN III, Stage III
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