### Skapa referens, olika format (klipp och klistra)

**Harvard**

Boström, A., Grahn, T. och Niklasson, A. (2003) *Scattering of elastic waves by a rectangular crack in an anisotropic half-space*.

** BibTeX **

@article{

Boström2003,

author={Boström, Anders and Grahn, Thomas and Niklasson, A. Jonas},

title={Scattering of elastic waves by a rectangular crack in an anisotropic half-space},

journal={Wave motion},

issn={0165-2125},

volume={38},

pages={91-107},

abstract={The scattering of elastic waves by a rectangular crack in a half-space of arbitrary anisotropy is considered. The application in mind is ultrasonic testing of thick-walled anisotropic components where the crack is close to a planar back surface. The orientation of the crack and the back surface may be arbitrary relative the anisotropy. The scattering problem is formulated as hypersingular integral equation for the crack-opening-displacement (COD) by means of a half-spce Green's tensor. The integral equation is solved by expanding the COD in a double series of Chebyshev functions with the correct behavior along the crack's edges. Insertion inte the integral equation and projection onto the same set of functions result in a linear system of equations for the expansion coefficients appearing in the representation of the COD. The transmitting transducer is modeled by the traction beneath it on the scanning surface and the incident field may then be calculated. An electromechanical reciprocity relation is used to model the receiving transducer. Numerical examples are included which show the influence of the anisotropy and espcially the prexence of a nearby planar back surface.},

year={2003},

keywords={ultrasonic waves, anisotropy, crack, rectangular, nondestructive testing},

}

** RefWorks **

RT Journal Article

SR Print

ID 234048

A1 Boström, Anders

A1 Grahn, Thomas

A1 Niklasson, A. Jonas

T1 Scattering of elastic waves by a rectangular crack in an anisotropic half-space

YR 2003

JF Wave motion

SN 0165-2125

VO 38

SP 91

AB The scattering of elastic waves by a rectangular crack in a half-space of arbitrary anisotropy is considered. The application in mind is ultrasonic testing of thick-walled anisotropic components where the crack is close to a planar back surface. The orientation of the crack and the back surface may be arbitrary relative the anisotropy. The scattering problem is formulated as hypersingular integral equation for the crack-opening-displacement (COD) by means of a half-spce Green's tensor. The integral equation is solved by expanding the COD in a double series of Chebyshev functions with the correct behavior along the crack's edges. Insertion inte the integral equation and projection onto the same set of functions result in a linear system of equations for the expansion coefficients appearing in the representation of the COD. The transmitting transducer is modeled by the traction beneath it on the scanning surface and the incident field may then be calculated. An electromechanical reciprocity relation is used to model the receiving transducer. Numerical examples are included which show the influence of the anisotropy and espcially the prexence of a nearby planar back surface.

LA eng

OL 30