Loading...
Please wait, while we are loading the content...
Similar Documents
Prediction of fatique crack growth under flight-simulation loading with the modified corpus model
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Padmadinata, U. H. Schijve, J. |
| Copyright Year | 1994 |
| Description | The CORPUS (Computation Of Retarded Propagation Under Spectrum loading) crack growth prediction model for variable-amplitude loading, as introduced by De Koning, was based on crack closure. It includes a multiple-overload effect and a transition from plane strain to plane stress. In the modified CORPUS model an underload affected zone (ULZ) is introduced, which is significant for flight-simulation loading in view of the once per flight compressive ground load. The ULZ is associated with reversed plastic deformation induced by the underloads after crack closure has already occurred. Predictions of the crack growth fatigue life are presented for a large variety of flight-simulation test series on 2024-T3 sheet specimens in order to reveal the effects of a number of variables: the design stress level, the gust spectrum severity, the truncation level (clipping), omission of small cycles, and the ground stress level. Tests with different load sequences are also included. The trends of the effects induced by the variables are correctly predicted. The quantitative agreement between the predictions and the test results is also satisfactory. |
| File Size | 882254 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950013055 |
| Archival Resource Key | ark:/13960/t6tx8816w |
| Language | English |
| Publisher Date | 1994-09-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Fatigue Life Variable Amplitude Loading Compression Loads Aluminum Alloys Plastic Deformation Crack Closure Crack Propagation Fatigue Tests Plane Stress Fatigue Materials Plane Strain Predictions Mathematical Models Aerodynamic Loads Flight Simulation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
