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Time dependency of strainrange partitioning life relationships
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Manson, S. S. Kalluri, S. |
| Copyright Year | 1984 |
| Description | The effect of exposure time (or creep rate) on the CP life relationship is established by conducting isothermal CP tests at varying exposure times on 316 Ss at 1300 and 1500 F. A reduction in the CP cycle life is observed with an increase in the exposure time of the CP test at a given inelastic strain-range. This phenomenon is characterized by modifying the Manson-Coffin type of CP relationship. Two new life relationships: (1) the Steady State Creep Rate (SSRC) Modified CP life relationship, and (2) the Failure Time (FT) Modified CP life relationship, are developed in this report. They account for the effect of creep rate and exposure time within the CP type of waveform. The reduction in CP cyclic life in the long exposure time tests is attributed to oxidation and the precipitation of carbides along the grain boundaries. |
| File Size | 3993732 |
| Page Count | 65 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19860004286 |
| Archival Resource Key | ark:/13960/t3b040h4w |
| Language | English |
| Publisher Date | 1984-08-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Grain Boundaries Time Dependence Creep Properties Life Durability Fatigue Materials Waveforms Oxidation Exposure Prediction Analysis Techniques Steady State Strain Rate 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 |
