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Nondestructive methods and special test instrumentation supporting nasa composite overwrapped pressure vessel assessments
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cameron, Ken Murthy, Pappu Revilock, Duane Thesken, John Greene, Nathanael Madaras, Eric Phoenix, Leigh Saulsberry, Regor Grimes-Ledesma, Lorie |
| Copyright Year | 2007 |
| Description | Many aging composite overwrapped pressure vessels (COPVs), being used by the National Aeronautics and Space Administration (NASA) are currently under evaluation to better quantify their reliability and clarify their likelihood of failure due to stress rupture and age-dependent issues. As a result, some test and analysis programs have been successfully accomplished and other related programs are still in progress at the NASA Johnson Space Center (JSC) White Sands Test Facility (WSTF) and other NASA centers, with assistance from the commercial sector. To support this effort, a group of Nondestructive Evaluation (NDE) experts was assembled to provide NDE competence for pretest evaluation of test articles and for application of NDE technology to real-time testing. Techniques were required to provide assurance that the test article had adequate structural integrity and manufacturing consistency to be considered acceptable for testing and these techniques were successfully applied. Destructive testing is also being accomplished to better understand the physical and chemical property changes associated with progression toward "stress rupture" (SR) failure, and it is being associated with NDE response, so it can potentially be used to help with life prediction. Destructive work also includes the evaluation of residual stresses during dissection of the overwrap, laboratory evaluation of specimens extracted from the overwrap to evaluate physical property changes, and quantitative microscopy to inform the theoretical micromechanics. |
| File Size | 3281321 |
| Page Count | 76 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20070010588 |
| Archival Resource Key | ark:/13960/t5p89817p |
| Language | English |
| Publisher Date | 2007-01-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Micromechanics Nasa Programs Nondestructive Tests Pressure Vessels Structural Failure Composite Wrapping Filament Winding Manufacturing Reliability Residual Stress Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
