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Mechanical data for use in damage tolerance analyses
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Johnston Jr., William M. Everett Jr., Richard A. James, Mark A. Newman, John A. Forth, Scott C. |
| Copyright Year | 2004 |
| Description | This report describes the results of a research program to determine the damage tolerance properties of metallic propeller materials. Three alloys were selected for investigation: 2025-T6 Aluminum, D6AC Steel and 4340 Steel. Mechanical response, fatigue (S-N) and fatigue crack growth rate data are presented for all of the alloys. The main conclusions that can be drawn from this study are as follows. The damage tolerant design of a propeller system will require a complete understanding of the fatigue crack growth threshold. There exists no experimental procedure to reliably develop the fatigue crack growth threshold data that is needed for damage tolerant design methods. Significant research will be required to fully understand the fatigue crack growth threshold. The development of alternative precracking methods, evaluating the effect of specimen configuration and attempting to identify micromechanical issues are simply the first steps to understanding the mechanics of the threshold. |
| File Size | 5043791 |
| Page Count | 142 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050019544 |
| Archival Resource Key | ark:/13960/t6m092t3g |
| Language | English |
| Publisher Date | 2004-12-01 |
| Access Restriction | Open |
| Subject Keyword | Structural Mechanics Propellers Aluminum Tolerances Mechanics Fatigue Materials Delaminating Aluminum Alloys Steels Damage Crack Propagation 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 |
