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Calculation of residual principal stresses in cvd boron on carbon filaments
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Behrendt, D. R. |
| Copyright Year | 1980 |
| Description | A three-dimensional finite element model of the chemical vapor deposition of boron on a carbon substrate (B/C) is developed. The model includes an expansion of the boron after deposition due to atomic rearrangement and includes creep of the boron and carbon. Curves are presented showing the variation of the principal residual stresses and the filament elongation with the parameters defining deposition strain and creep. The calculated results are compared with experimental axial residual stress and elongation measurements made on B/C filaments. For good agreement between calculated and experimental results, the deposited boron must continue to expand after deposition, and the build up of residual stresses must be limited by significant boron and carbon creep rates. |
| File Size | 516379 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19800011830 |
| Archival Resource Key | ark:/13960/t0zp8v17k |
| Language | English |
| Publisher Date | 1980-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Boron Fibers Finite Element Method Carbon Fibers Stress Analysis Vapor Deposition Mathematical Models Three Dimensional Models Expansion Residual Stress Elongation Creep Analysis Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
