Genetic identification of crack-tip parameters using thermoelastic isopachics

Dulieu-Barton, J.M. and Worden, K. (2003) Genetic identification of crack-tip parameters using thermoelastic isopachics. Measurement Science and Technology, 14, (2), 176-183. (doi:10.1088/0957-0233/14/2/304).


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A curve-fitting routine based on a genetic algorithm is used to generate noise-free cardioid curves from thermoelastic data obtained from the neighbourhood of a crack-tip. The technique is benchmarked using simulated thermoelastic data. The generated cardioid curves are used to determine the stress intensity factors (SIFs) from slots and real cracks loaded in mode 1 and mixed-mode. The derived SIFs show excellent agreement with theory and confirm the validity of the approach. The curve-fitting approach allows more information to be obtained from the thermoelastic data than previous analysis routines and will provide a basis for further development of thermoelastic stress analysis for application in crack-tip stress studies.

Item Type: Article
ISSNs: 0957-0233 (print)
Related URLs:
Keywords: thermoelastic stress analysis, stress intensity factors, crack-tip parameters, genetic algorithm, curve-fitting
Subjects: T Technology > TJ Mechanical engineering and machinery
Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences
ePrint ID: 22235
Date Deposited: 17 Mar 2006
Last Modified: 06 Aug 2015 02:21

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