Probabilistic Method to Establish the Reliability of Carbon-Carbon Rocket MotorNozzles. Volume 3. Stress and Reliability Analysis of Layered Composite Cylinders Under Thermal Shock

摘要

The state of stress in a cylindrical structure consisting of multiple layers ofcarbon-carbon composite and subjected to thermal and pressure shock are analyzed using an elasticity approach. The reliability of the structure based on the weakest link concept and the Weibull distribution is also calculated. Coupled thermo-elasticity is first assumed and is shown to be unnecessary for the material considered. The effects of external and internal thermal shock as well as a superimposed pressure shock are examined. It is shown that for the geometry chosen, the structure may fail when exposed to thermal shock alone while a superimposed pressure shock can mitigate the probability of failure.