Flaw Characterization and Sizing Using Sensitivity Analysis and the Boundary Element Method

dc.contributor.author Tortorelli, Daniel
dc.contributor.author Wang, Zi-Xian
dc.contributor.author Krishnasamy, Guna
dc.date 2018-02-14T06:51:03.000
dc.date.accessioned 2020-06-30T06:38:55Z
dc.date.available 2020-06-30T06:38:55Z
dc.date.copyright Wed Jan 01 00:00:00 UTC 1992
dc.date.issued 1992
dc.description.abstract <p>The scattered field from an arbitrary shaped flaw due to a known incident field can be obtained numerically using the boundary element method [1]. In this so-called forward problem the flaw shape, it’s location, the incident field and the properties of the material are always known apriori. However, in nondestructive evaluation all information regarding the flaw shape is not known apriori. Instead, a finite number of scattered field measurements are available for a known incident field from which the flaw shape is to be determined. Problems of this type are referred to as inverse problems. Here we propose a means of solving the inverse problem which combines numerical optimization, the boundary element method and shape sensitivity analysis. In this approach the forward problem for an assumed flaw shape is initially solved. Then for the assumed shape the sensitivities of the scattered field with respect the different shape parameters which describe the flaw are computed. The solution to the forward problem, the sensitivities and the experimental measurement of the scattered field are then used as the driving mechanism for the optimization (cf. [2],[3],[4],[5],[6], and [7]). The optimization problem minimizes the error between the computed and the experimentally measured scattered field by appropriately redefining the shape parameters.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/1992/allcontent/107/
dc.identifier.articleid 2996
dc.identifier.contextkey 5800924
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/1992/allcontent/107
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/59900
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/1992/allcontent/107/1992_Tortorelli_FlawCharacterization.pdf|||Fri Jan 14 18:26:11 UTC 2022
dc.source.uri 10.1007/978-1-4615-3344-3_107
dc.title Flaw Characterization and Sizing Using Sensitivity Analysis and the Boundary Element Method
dc.type event
dc.type.genre article
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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