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Calibration of the thermoelastic stress analysis technique under sinusoidal and random loading conditions
Author(s) -
Harwood N.,
Cummings W.M.
Publication year - 1989
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1989.tb00701.x
Subject(s) - thermoelastic damping , calibration , stress (linguistics) , modal analysis , structural engineering , materials science , modal , thermal , component (thermodynamics) , engineering , composite material , physics , mathematics , finite element method , statistics , thermodynamics , linguistics , philosophy
For the past five years the National Engineering Laboratory (NEL) has been engaged in a research programme investigating the applications of thermoelastic stress analysis to engineering structures. This paper discusses the use of a uniformly stressed component for the calibration of SPATE (Stress Pattern Analysis by Thermal Emission). Experimental results for sinusoidal loading on a carbon steel are compared with a theoretical prediction based upon material properties and instrument characteristics. A calibration technique which is suitable for the measurement of quantitative stresses under random loading, including modal behaviour, is also described.