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Dynamic impact tolerance of shuttle rcc leading edge panels using ls-dyna
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Melis, Matthew E. Stockwell, Alan E. Carney, Kelly S. Lyle, Karen H. Spellman, Regina L. Hardy, Robin C. Fasanella, Edwin Jones, Lisa E. Jackson, Karen E. |
| Copyright Year | 2008 |
| Description | This paper describes a research program conducted to enable accurate prediction of the impact tolerance of the shuttle Orbiter leading-edge wing panels using 'physics-based- codes such as LS-DYNA, a nonlinear, explicit transient dynamic finite element code. The shuttle leading-edge panels are constructed of Reinforced-Carbon-Carbon (RCC) composite material, which issued because of its thermal properties to protect the shuttle during re-entry into the Earth's atmosphere. Accurate predictions of impact damage from insulating foam and other debris strikes that occur during launch required materials characterization of expected debris, including strain-rate effects. First, analytical models of individual foam and RCC materials were validated. Next, analytical models of individual foam cylinders impacting 6-in. x 6-in. RCC flat plates were developed and validated. LS-DYNA pre-test models of the RCC flat plate specimens established the impact velocity of the test for three damage levels: no-detectable damage, non-destructive evaluation (NDE) detectable damage, or visible damage such as a through crack or hole. Finally, the threshold of impact damage for RCC on representative Orbiter wing panels was predicted for both a small through crack and for NDE-detectable damage. |
| File Size | 2318285 |
| Page Count | 20 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20080043558 |
| Archival Resource Key | ark:/13960/t9v171356 |
| Language | English |
| Publisher Date | 2008-01-01 |
| Access Restriction | Open |
| Subject Keyword | Space Transportation And Safety Carbon-carbon Composites Structural Design Nondestructive Tests Damage Assessment Impact Velocity Space Shuttle Orbiters Wing Panels Impact Tolerances Computer Programs Finite Element Method Cracks Leading Edges Impact Damage Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
