Abstract
An experimental evaluation was conducted at NASA Lewis Research Center to compare and contrast the performance of a newly developed resistance strain gage, the PdCr temperature-compensated wire strain gage, to that of a conventional high-temperature extensometry. The evaluation of the two strain measurement systems was conducted through the application of various thermal and mechanical loading spectra using a high-temperature thermomechanical uniaxial testing system equipped with quartz lamp heating. The purpose of the testing was not only to compare and contrast the two strain sensors but also to investigate the applicability of the PdCr strain gage to the testing environment typically employed when characterizing the high-temperature mechanical behavior of structural materials. Strain measurement capabilities to 800°C were investigated with a nickel base superalloy IN100 substrate material, and application to titanium matrix composite (TMC) materials was examined with the SCS-6/Ti-15-3 [0]8 system. PdCr strain gages installed by three attachment techniques—namely, flame spraying, spot welding and rapid infrared joining—were investigated.
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References
Lei, J.-F., “A Resistance Strain Gage with Repeatable and Cancelable Apparent Strain for Use to 800°C,” NASA CR-185256 (July 1990).
Lei, J.-F. and Wnuk, S.P., “A Flame-sprayed Resistance Strain Gage for High-temperature Applications,”J. Thermal Spray Technology,3 (3) (1994).
Fichtel, E. and McDaniel, A., “Strain Gage Technology for Turbine Engine,” NASA CR-191177 (1993).
Blue, A.A., Blue, R.A., Lin, R.Y., Lei, J.-F. and Williams, W.D., “Infrared Joining of Titanium Matrix Composites,” Proc. American Society for Composites, Eighth Technical Conf. (October 1993).
Castelli, M.G., “An Advanced Test Technique to Quantify Thermomechanical Fatigue Damage Accumulation in Composite Materials,”
J. Composites Technology and Research,16 (4) (October 1994).
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Lei, J.F., Castelli, M.G., Androjna, D. et al. Comparison testings between two high-temperature strain measurement systems. Experimental Mechanics 36, 430–435 (1996). https://doi.org/10.1007/BF02328588
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DOI: https://doi.org/10.1007/BF02328588