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Thermoelastic Stress Analysis: The Mean Stress Effect in Metallic AlloysThe primary objective of this study involved the utilization of the thermoelastic stress analysis (TSA) method to demonstrate the mean stress dependence of the thermoelastic constant. Titanium and nickel base alloys, commonly employed in aerospace gas turbines, were the materials of interest. The repeatability of the results was studied through a statistical analysis of the data. Although the mean stress dependence was well established, the ability to confidently quantify it was diminished by the experimental variations. If calibration of the thermoelastic response to mean stress can be successfully implemented, it is feasible to use the relationship to determine a structure's residual stress state.
Document ID
19990078736
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Gyekenyesi, Andrew L. (Akron Univ. Akron, OH United States)
Baaklini, George Y. (NASA Glenn Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
July 1, 1999
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-1999-209376
E-11789
NAS 1.15:209376
Funding Number(s)
PROJECT: RTOP 522-18-13
CONTRACT_GRANT: NCC3-651
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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