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Development of strain gages for use to 1311 k (1900 f)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lemcoe, M. M. |
| Copyright Year | 1974 |
| Description | A high temperature electric resistance strain gage system was developed and evaluated to 1366 K (2000 F) for periods of at least one hour. Wire fabricated from a special high temperature strain gage alloy (BCL-3), was used to fabricate the gages. Various joining techniques (NASA butt welding, pulse arc, plasma needle arc, and dc parallel gap welding) were investigated for joining gage filaments to each other, gage filaments to lead-tab ribbons, and lead-tab ribbons to lead wires. The effectiveness of a clad-wire concept as a means of minimizing apparent strain of BCL-3 strain gages was investigated by sputtering platinum coatings of varying thicknesses on wire samples and establishing the optimum coating thickness--in terms of minimum resistivity changes with temperature. Finally, the moisture-proofing effectiveness of barrier coatings subjected to elevated temperatures was studied, and one commercial barrier coating (BLH Barrier H Waterproofing) was evaluated. |
| File Size | 3363690 |
| Page Count | 98 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19740024785 |
| Archival Resource Key | ark:/13960/t4hn00t96 |
| Language | English |
| Publisher Date | 1974-07-10 |
| Access Restriction | Open |
| Subject Keyword | Electrical Resistance Strain Gages High Temperature Waterproofing Plasma Arc Welding 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 |
