Genetic identification of crack-tip parameters using thermoelastic isopachics
Genetic identification of crack-tip parameters using thermoelastic isopachics
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.
thermoelastic stress analysis, stress intensity factors, crack-tip parameters, genetic algorithm, curve-fitting
176-183
Dulieu-Barton, J.M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Worden, K.
07522936-fd47-4df2-b75e-c3d297d104b3
2003
Dulieu-Barton, J.M.
9e35bebb-2185-4d16-a1bc-bb8f20e06632
Worden, K.
07522936-fd47-4df2-b75e-c3d297d104b3
Dulieu-Barton, J.M. and Worden, K.
(2003)
Genetic identification of crack-tip parameters using thermoelastic isopachics.
Measurement Science and Technology, 14 (2), .
(doi:10.1088/0957-0233/14/2/304).
Abstract
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.
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Published date: 2003
Keywords:
thermoelastic stress analysis, stress intensity factors, crack-tip parameters, genetic algorithm, curve-fitting
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Local EPrints ID: 22235
URI: http://eprints.soton.ac.uk/id/eprint/22235
ISSN: 0957-0233
PURE UUID: 2b26f37d-1abe-4d6a-a12d-49f32051c097
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Date deposited: 17 Mar 2006
Last modified: 15 Mar 2024 06:36
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Author:
K. Worden
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