Loading...
Please wait, while we are loading the content...
Similar Documents
Fatigue and fracture overview
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Halford, Gary R. |
| Copyright Year | 1986 |
| Description | The accomplishments achieved under the isotropic creep-fatigue crack initiation life prediction program are summarized. A sizeable creep-fatigue crack initiation data base was generated on the nickel-base superalloy, B-1900. Companion constitutive modeling programs have also generated extensive data bases on the same heat of material. The crack initiation results have formed the basis of a new approach to creep-fatigue life prediction. The term Cyclic Damage Accumulation (CDA) was coined for the method, which was evaluated under isothermal, uniaxial conditions. Stringent laboratory verification experiments were used to test the accuracy of the method. Considering the quite limited material property data needed to evaluate the constants in the approach, the prediction accuracy is acceptable. At the expense of the larger data base required, Lewis developed total strain- strainrange partitioning method (TS-SRP) is capable of a higher degree of accuracy. |
| File Size | 486341 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19890003511 |
| Archival Resource Key | ark:/13960/t1ng9j254 |
| Language | English |
| Publisher Date | 1986-10-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Fatigue Life Damage Assessment Creep Properties Fracture Mechanics Nickel Alloys Heat Resistant Alloys Stress Cycles Cyclic Loads Gas Turbine Engines General Overviews Prediction Analysis Techniques 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 | Article |
