Loading...
Please wait, while we are loading the content...
Similar Documents
Aluminum u-groove weld enhancement based on experimental stress analyses
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Vaughan, R. Verderaime, V. |
| Copyright Year | 1995 |
| Description | Though butt-welds are among the most preferred joining methods in aerostructures because of their sealing and assembly integrity and general elastic performance; their inelastic mechanics are generally the least understood. This study investigated experimental strain distributions across a thick aluminum U-grooved weld and identified two weld process considerations for improving the multipass weld strength. The extreme thermal expansion and contraction gradient of the fusion heat input across the tab thickness between the grooves produce severe peaking, which induces bending moment under uniaxial loading. The filler strain hardening decreased with increasing filler pass sequence. These combined effects reduce the weld strength, and a depeaking index model was developed to select filler pass thicknesses, pass numbers, and sequences to improve the welding process results over the current normal weld schedule. |
| File Size | 2239375 |
| Page Count | 48 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19960000864 |
| Archival Resource Key | ark:/13960/t2b90677j |
| Language | English |
| Publisher Date | 1995-08-01 |
| Access Restriction | Open |
| Subject Keyword | Launch Vehicles And Space Vehicles Stress Analysis Welding Weld Strength Aircraft Construction Materials Aluminum Alloys Thickness Thermal Expansion Welded Joints Bending Moments Strain Distribution Heat Affected Zone Strain Hardening Butt Joints 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 |
