A FULL BRIDGE TYPE STRAIN GAGE FOR USE AT ELEVATED TEMPERATURES
Abstract
Work consisted of a study of the strain and thermal characteristics of a Full Bridge strain gage over a temperature range of 600 to 2000 F. The following tests were performed: 1. Measurement of bridge sensitivity factor at room and elevated temperatures. 2. Gage drift at constant temperature. 3. Response of gage to rapid radiant heating. 4. Leakage to ground resistance measurement. 5. Self heating effects. It is shown that: 1. Gage installation by means of flame sprayed material was adequate for use to 2000 F. 2. Average bridge sensitivity factor was 7.0 = 0.5 as measured at room temperature with a slight decrease at 1100 F. 3. Self heating effects of the gage were minimized. 4. Gage demonstrated a negligible drift rate to 1400 F. 5. Leakage resistance when measured at 2000 F., at a heating rate of 50 F./second was 10 megohms. The gage material selected on the basis of previous tests was not full acceptable for gage use to 2000 F., because a metallurgical transition occurs above 1500 F.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1964
- Accession Number
- AD0465437
Entities
People
- Benedict A. Sokolcwski