
Accession Number : ADA117651
Title : Probabilistic Environmental Model for Solid Rocket Motor Life Prediction.
Descriptive Note : Technical publication,
Corporate Author : FAILURE ANALYSIS ASSOCIATES PALO ALTO CA
Personal Author(s) : Derbalian,George ; Thomas,Jerrell M ; Johnston,Paul ; Brooks,Gregg
PDF Url : ADA117651
Report Date : Mar 1982
Pagination or Media Count : 222
Abstract : Temperature changes that solid rocket motors experience while residing in various locations with different climates cause thermal stresses in the propellant. Repeated application of such stresses can cause damage to the rocket propellant, which may result in cracks. This report describes a probabilistic environmental model for solid rocket motors. Movement of rockets from one station to an other is simulated, using a Markov chain technique. A cumulative damage model is used to compile the damage resulting in each rocket location. The rocket external temperature is assumed to be a random variable and expressed in a probabilistic form for each Markov state. As an example, data were collected to represent the environmental model for Sidewinder rockets. The Markov matrix for Sidewinders was based on past motor logistics. Propellant failure is predicted when the cumulative damage exceeds a critical value. (Author)
Descriptors : *Solid propellant rocket engines, *Solid rocket propellants, *Shelf life, *Thermal stresses, *Thermal degradation, Computerized simulation, Probability, Predictions, Failure, Numerical methods and procedures, Computer programs, Damage assessment
Subject Categories : Computer Programming and Software
Mfg & Industrial Eng & Control of Product Sys
Solid Propellant Rocket Engines
Solid Rocket Propellants
Distribution Statement : APPROVED FOR PUBLIC RELEASE