Loading...
Please wait, while we are loading the content...
Similar Documents
Determination of turbine blade life from engine field data (Document No: 20130013703)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hendricks, Robert C. Litt, Jonathan S. Zaretsky, Erwin V. Soditus, Sherry M. |
| Copyright Year | 2013 |
| Description | It is probable that no two engine companies determine the life of their engines or their components in the same way or apply the same experience and safety factors to their designs. Knowing the failure mode that is most likely to occur minimizes the amount of uncertainty and simplifies failure and life analysis. Available data regarding failure mode for aircraft engine blades, while favoring low-cycle, thermal-mechanical fatigue (TMF) as the controlling mode of failure, are not definitive. Sixteen high-pressure turbine (HPT) T-1 blade sets were removed from commercial aircraft engines that had been commercially flown by a single airline and inspected for damage. Each set contained 82 blades. The damage was cataloged into three categories related to their mode of failure: (1) TMF, (2) Oxidation/erosion (O/E), and (3) Other. From these field data, the turbine blade life was determined as well as the lives related to individual blade failure modes using Johnson-Weibull analysis. A simplified formula for calculating turbine blade life and reliability was formulated. The L10 blade life was calculated to be 2427 cycles (11 077 hr). The resulting blade life attributed to O/E equaled that attributed to TMF. The category that contributed most to blade failure was Other. If there were no blade failures attributed to O/E and TMF, the overall blade L(sub 10) life would increase approximately 11 to 17 percent. |
| File Size | 1162468 |
| Page Count | 30 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20130013703 |
| Archival Resource Key | ark:/13960/t3324xv23 |
| Language | English |
| Publisher Date | 2013-04-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Service Life Fatigue Life Fracture Mechanics Turbine Blades Failure Modes Creep Rupture Strength Thermal Fatigue Creep Analysis Failure Analysis Oxidation Fracture Strength Weibull Density Functions Erosion 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 |
