Numerical modeling of elastic wave propagation and scattering with EFIT — elastodynamic finite integration technique

Fellinger, P.; Marklein, R.; Langenberg, K. J.; Klaholz, S.

doi:10.1016/0165-2125(94)00040-c

Cited by 270 publications

(120 citation statements)

References 8 publications

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“…Such complex distributions are, in particular, found in industrial materials and have shown to be a challenge for ultrasonic non-destructive evaluation (NDE) systems in which the main interest is the recorded transducer signals (A-and B-scans) arising due to elastic scattering from material cracks [1][2] . Much has been written on scattering of ultrasonic waves by inhomogeneities [3][4] and its effect on ultrasonic images [5][6] and quantitative NDE [7][8] .…”

Section: Introductionmentioning

confidence: 99%

A multi-domain Chebyshev collocation method for predicting ultrasonic field parameters in complex material geometries

Nielsen¹,

Hesthaven

2002

Ultrasonics

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In many areas of acoustical imaging, such as ultrasonic non-destructive evaluation (NDE), a realistic calculation of ultrasonic field parameters and associated elastic wave scattering requires the treatment of discontinuous, layered solids in complex geometries. These facts suggest the need for an accurate and geometrically flexible numerical approach for the simulation of the ultrasonic field, rather than reliance on semi-analytic solutions.In this paper we present an approach for solving the elastic wave equation in discontinuous scattering related to ultrasonic NDE are presented as evidence of the accuracy and flexibility of the proposed computational method.

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Section: Introductionmentioning

confidence: 99%

A multi-domain Chebyshev collocation method for predicting ultrasonic field parameters in complex material geometries

Nielsen¹,

Hesthaven

2002

Ultrasonics

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“…For hexagonal crystals or transversely isotropic media the stiffness tensor has the coordinate-free form (10) mi, i=I,2,3 are the three symmetry planes normal unit-vectors and the Ci, i = 1, ... ,9 are the nine independent stiffness constants. We have also formulated coordinate-free stiffness tensors for cubic [4] and tetragonal crystal structures [14]. [16].…”

Section: (6)mentioning

confidence: 99%

“…Interpretation of the very complicated behavior of elastic waves, especially in inhomogeneous anisotropic media, requires powerful computational tools to model and study advanced NDT situations. Such a tool is the well-established Elastodynamic Finite Integration Technique (EFIT) basically formulated by Fellinger [3,4]. Recently, EFIT has been extented to simulate elastic waves in dissipative (viscoelastic) and homogeneous anisotropic media [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Ultrasonic Modeling Code Efit as Applied to Inhomogeneous Dissipative Isotropic and Anisotropic Media

Marklein

Bärmann

Langenberg

1995

Review of Progress in Quantitative Nondestructive Evaluation

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“…Fellinger et al originally developed the basic equations of EFIT along with a unique way to discretize the material parameters for insured continuity of stress and displacement across the staggered grid in 1995 [49]. Schubert et al then adapted the EFIT equations into cylindrical coordinates (CEFIT) to investigate axisymmetric wave propagation in pipes with a 2D grid [50].…”

Section: Introductionmentioning

confidence: 99%

Lamb Wave Detection of Delaminations in Large Diameter Pipe Coatings

Bingham¹,

Hinders²

2009

TOACOJ

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This paper describes combined experiments and simulations to automate the extraction of ultrasonic guided wave mode arrivals in order to gain quantitative information about large-diameter pipeline coatings. The dynamic wavelet fingerprint technique (DWFT) is used to show differences between unknown coatings as well as to identify the presence of delamination and grinding flaws within the Lamb wave propagation path. Combined with complex multi-layered models to help interpret the guided wave feature changes, this extraction algorithm can be used for the detection of hidden flaws under a variety of protective coatings without having to disturb the coating or pipeline flow. High-resolution supercomputer simulations are developed using the elastodynamic finite integration technique (EFIT) accounting for the 3D interaction of realistic Lamb wave beams with finite-sized coating delaminations.

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Numerical modeling of elastic wave propagation and scattering with EFIT — elastodynamic finite integration technique

Cited by 270 publications

References 8 publications

A multi-domain Chebyshev collocation method for predicting ultrasonic field parameters in complex material geometries

A multi-domain Chebyshev collocation method for predicting ultrasonic field parameters in complex material geometries

The Ultrasonic Modeling Code Efit as Applied to Inhomogeneous Dissipative Isotropic and Anisotropic Media

Lamb Wave Detection of Delaminations in Large Diameter Pipe Coatings

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