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Strain-life assessment of grainex mar-m 247 for nasa's turbine seal test facility
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Steinetz, Bruce M. Delgado, Irebert R. Rimnac, Clare M. Halford, Gary R. |
| Copyright Year | 2004 |
| Description | NASA s Turbine Seal Test Facility is used to test air-to-air seals for use primarily in advanced jet engine applications. Combinations of high temperature, high speed, and high pressure limit the disk life, due to the concern of crack initiation in the bolt holes of the Grainex Mar-M 247 disk. The primary purpose of this current work is to determine an inspection interval to ensure safe operation. The current work presents high temperature fatigue strain-life data for test specimens cut from an actual Grainex Mar-M 247 disk. Several different strain-life models were compared to the experimental data including the Manson-Hirschberg Method of Universal Slopes, the Halford-Nachtigall Mean Stress Method, and the Modified Morrow Method. The Halford-Nachtigall Method resulted in only an 18 percent difference between predicted and experimental results. Using the experimental data at a 99.95 percent prediction level and the presence of 6 bolt holes it was found that the disk should be inspected after 665 cycles based on a total strain of 0.5 percent at 649 C. |
| File Size | 1194529 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20040073474 |
| Archival Resource Key | ark:/13960/t05x78v38 |
| Language | English |
| Publisher Date | 2004-04-01 |
| Access Restriction | Open |
| Subject Keyword | Mechanical Engineering Cycles Fatigue Life Test Facilities Life Durability High Speed Nickel Compounds Thermal Fatigue High Temperature Sealing Turbines Holes Mechanics Crack Initiation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
