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A record of all marker bands found in the upper rivet rows of 2 adjacent bays from a fuselage lap splice joint
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Willard, Scott A. |
| Copyright Year | 1995 |
| Description | A full scale fuselage test article was subjected to 60,000 load cycles (pressurizations) to study the effect of widespread fatigue damage in fuselage structures. Every 10,000 cycles coded marker block loading sequences were used to mark the fracture surfaces of the fatigue cracks propagating within the panel. The loading sequences consisted of series of underloads combined with a series of full pressurizations. The combination of loads and underloads marked the fracture surfaces with marker bands that could later be used to reconstruct the fatigue crack growth history of selected regions within the test article. Thirty rivet holes comprising the upper rivet rows from two adjacent bays (bays #3 and #4) from a fuselage lap splice joint were examined for the purpose of this study. Optical and scanning electron microscopy (SEM) were used to locate the marker bands. |
| File Size | 1162009 |
| Page Count | 50 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960009106 |
| Archival Resource Key | ark:/13960/t4sj6dj5c |
| Language | English |
| Publisher Date | 1995-11-01 |
| Access Restriction | Open |
| Subject Keyword | Composite Materials Fatigue Tests Cycles Scanning Electron Microscopy Full Scale Tests Fatigue Materials Optical Scanners Markers Cracking Fracturing Fuselages Holes Mechanics Load Tests 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 |
