Accession Number : AD0465437


Title :   A FULL BRIDGE TYPE STRAIN GAGE FOR USE AT ELEVATED TEMPERATURES


Descriptive Note : Final rept., Jun 1962-Nov 1963


Corporate Author : HIGH TEMPERATURE INSTRUMENTS CORP PHILADELPHIA PA


Personal Author(s) : Sokolcwski, Benedict A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/465437.pdf


Report Date : Apr 1964


Pagination or Media Count : 142


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.


Descriptors :   *STRAIN GAGES , THERMAL PROPERTIES , MEASUREMENT , MECHANICAL PROPERTIES , PERFORMANCE(ENGINEERING) , MATERIALS , HIGH TEMPERATURE , INSTRUMENTATION , NICKEL ALLOYS , ELECTRIC BRIDGES , ELECTRICAL RESISTANCE , LOADS(FORCES) , TEST METHODS , VOLTAGE , TEST EQUIPMENT , STRAIN(MECHANICS) , THERMAL EXPANSION


Subject Categories : Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE