| The high temperature behavior of carbon-phenolic and carbon-carbon composites was investigated. Models were developed which describe the thermal and mechanical responses of such composites when rapidly heated to temperatures as high as 3300{dollar}spcirc{dollar}C. On the basis of the models, a computer code was written which provides the temperature and pressure distributions, vapor and volatile formation rates, amount of char, stress and strain, and damage in carbon-phenolic and carbon-carbon plates. To validate the model and the code, temperature distributions in and damage of rapidly heated carbon-phenolic composites were measured. The data compared well to the results calculated by the code. Parametric studies were performed, the results of which yield physical insights into the ply-lift phenomenon observed in solid rocket motor exit cone linings and provide a guide in the design of parts made of carbon-phenolic and carbon-carbon composites. |
