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**Harvard**

Westlund, J. och Boström, A. (2012) *Elastic wave scattering by a rectangular crack near a non-planar back surface*.

** BibTeX **

@article{

Westlund2012,

author={Westlund, Jonathan and Boström, Anders},

title={Elastic wave scattering by a rectangular crack near a non-planar back surface},

journal={Engineering analysis with boundary elements},

issn={0955-7997},

volume={36},

pages={1189-1198},

abstract={A 3D model of non-destructive ultrasonic testing for cracks near a non-planar back surface is presented. The scattering by an interior rectangular crack in a thick-walled component with a back surface of general geometry is considered. The 3D wave scattering problem is solved using boundary integral equation methods (BIEMs): the boundary element method (BEM) for the back surface displacement is
combined with an analytical technique for the hypersingular traction boundary integral equation for the crack opening displacement. The solution method generates many unknowns, but by applying a threshold criterion a sparse approximation of the system matrix is obtained such that a fast sparse solver may be used. The computations are accelerated further using the stationary phase approximation
for the computation of probe field integrals. The action of ultrasonic probes in transmission and reception, calibration by side-drilled holes and effects of material damping are taken into account in the model, and a few numerical examples illustrate the influence of the back surface geometry.},

year={2012},

keywords={Elastic waves, boundary integral equation method, boundary element method, scattering, non-destructive testing, ultrasonics},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 168004

A1 Westlund, Jonathan

A1 Boström, Anders

T1 Elastic wave scattering by a rectangular crack near a non-planar back surface

YR 2012

JF Engineering analysis with boundary elements

SN 0955-7997

VO 36

SP 1189

OP 1198

AB A 3D model of non-destructive ultrasonic testing for cracks near a non-planar back surface is presented. The scattering by an interior rectangular crack in a thick-walled component with a back surface of general geometry is considered. The 3D wave scattering problem is solved using boundary integral equation methods (BIEMs): the boundary element method (BEM) for the back surface displacement is
combined with an analytical technique for the hypersingular traction boundary integral equation for the crack opening displacement. The solution method generates many unknowns, but by applying a threshold criterion a sparse approximation of the system matrix is obtained such that a fast sparse solver may be used. The computations are accelerated further using the stationary phase approximation
for the computation of probe field integrals. The action of ultrasonic probes in transmission and reception, calibration by side-drilled holes and effects of material damping are taken into account in the model, and a few numerical examples illustrate the influence of the back surface geometry.

LA eng

DO 10.1016/j.enganabound.2012.02.019

LK http://dx.doi.org/10.1016/j.enganabound.2012.02.019

LK http://publications.lib.chalmers.se/records/fulltext/168004/local_168004.pdf

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