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Line segment crack recovery from incomplete boundary data

Amel Ben Abda1,5, Moez Kallel2, Juliette Leblond3 and Jean-Paul Marmorat4

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We are concerned with non-destructive control issues, namely detection and recovery of cracks in a planar (2D) isotropic conductor from partial boundary measurements of a solution to the Laplace–Neumann problem. We first build an extension of that solution to the whole boundary, using constructive approximation techniques in classes of analytic and meromorphic functions, and then use localization algorithms based on boundary computations of the reciprocity gap.


PACS

81.70.-q Methods of materials testing and analysis

81.40.Np Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure

02.30.Jr Partial differential equations

02.30.Zz Inverse problems

62.20.M- Structural failure of materials

MSC

35J05 Laplace equation, reduced wave equation (Helmholtz), Poisson equation (See also 31Axx, 31Bxx)

35R30 Inverse problems (undetermined coefficients, etc.) for PDE

Subjects

Mathematical physics

Condensed matter: structural, mechanical & thermal

Dates

Issue 4 (August 2002)

Received 31 January 2002, in final form 27 May 2002

Published 24 June 2002



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