Thermostructural Analysis of Three-Dimensional Orthogonally Reinforced Carbon-Carbon Materials.
Abstract
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 material's 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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 05, 1974
- Accession Number
- AD0783209
Entities
People
- D. E. Geiler
Organizations
- The Aerospace Corporation