Strain Gage Measurement Errors in the Transient Heating of Structural Components
Richards, W. Lance (1993) Strain Gage Measurement Errors in the Transient Heating of Structural Components. Technical Report NASA TM-104274, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
Significant strain-gage errors may exist in measurements acquired in transient thermal environments if conventional correction methods are applied. Conventional correction theory was modified and a new experimental method was developed to correct indicated strain data for errors created in radiant heating environments ranging from 0.6 °C/sec (1 °F/sec) to over 56 °C/sec (100 °F/sec). In some cases the new and conventional methods differed by as much as 30 percent. Experimental and analytical results were compared to demonstrate the new technique. For heating conditions greater than 6 °C/sec (10 °F/sec), the indicated strain data corrected with the developed technique compared much better to analysis than the same data corrected with the conventional technique.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Apparent strain, Measurement errors, Strain–gage measurement, Structural testing, Thermal stress analysis |
| Subjects: | (31 - 39) Engineering: (39) Structural Mechanics |
| ID Code: | 268 |
| Deposited On: | 23 July 2004 |
| Additional Information: | 16 pages. Prepared as a conference paper for the SEM Fall Conference and Exhibit - Structural Testing at High Temperature II, Ojai, CA, Nov. 8–10, 1993. |
