Reliability Analysis of Thermally Stressed Viscoelastic Structures by Monte Carlo Simulation
Probabilistic models for predicting the service life of missile structures subjected to random thermal loads have been developed. The models are applicable to both elastic and viscoelastic materials and utilize the finite element method. Statistical descriptions of the stresses, strains and damage parameters are generated using Monte Carlo computer simulation techniques and mathematical models of the thermal environments in arctic temperate, and desert geographical locations. The statistical descriptions of the induced stresses, strains, and damage are compared with similar descriptions of allowable parameters using interferrence techniques to compute a probability of failure. Realibility concepts are then used to generate service life estimates.
KeywordsService Life Thermal Environment Relaxation Modulus Allowable Stress Rocket Motor
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