Thermostructural Analysis of Three-Dimensional Orthogonally Reinforced Carbon-Carbon Materials.
Final rept. Jan-Mar 73,
AEROSPACE CORP EL SEGUNDO CALIF ENGINEERING SCIENCE OPERATIONS
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Thermostructural analyses for reentry vehicle nose tips of three-dimensional, orthogonally reinforced, pyrolyzed carbon-carbon materials generally have been performed with the assumption that the material is cylindrically orthotropic. Examination of the materials actual heterogeneous construction indicates noncylindrical orthotropy with a circumferential variation of properties in a plane normal to the billet axis. A technique is used which recognizes the actual noncylindrical orthotropic behavior of these carbon-carbons and which provides a consistent set of constitutive constants from test data. Analytical results are provided for a ring and a nose tip which indicate the cylindrically orthotropic assumption can lead to very unconservative predictions of critical stresses and strains. Author
- Laminates and Composite Materials
- Guided Missiles
- Unmanned Spacecraft