Extraction of dispersion curves for waves propagating in free complex waveguides by standard finite element codes

Sorohan, Ştefan; Constantin, Nicolae; Găvan, Mircea; Anghel, Viorel

doi:10.1016/j.ultras.2010.12.003

Cited by 83 publications

(48 citation statements)

References 37 publications

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“…The ANSYS finite element software was used to obtain wave propagation through the 2D geometry which includes an implicit algorithm with Newmark time integration method for solving the transient wave propagation. The model of elastic wave propagation is based on the assumption of linear elasticity and solution of the Navier equation of the elastic wave motion in matrix form [38][39][40][41][42][43][44]:…”

Section: Transmission Losses Dependence From Lap Joint Width and Opermentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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Abstract:The objective of the research presented here is the investigation of ultrasonic guided wave (UGW) propagation through the lap joint welded plates used in the construction of a storage tank floors. The investigations have been performed using numerical simulation by finite element method (FEM) and tested by measurement of the transmission losses of the guided waves transmitted through the welded lap joints. Propagation of the symmetric S 0 mode in the welded stainless steel plates in the cases of different lap joint overlap width, operation frequency, and additional plate bonding caused by corrosion were investigated. It was shown that the transmission losses of the S 0 mode can vary in the range of 2 dB to 8 dB depending on the ratio between lap joint width and wavelength. It was also demonstrated that additional bonding in the overlap zone caused by corrosion can essentially reduce transmission losses.

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Section: Transmission Losses Dependence From Lap Joint Width and Opermentioning

confidence: 99%

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Jankauskas

Mažeika

2016

Metals

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“…Having defined the plate parameters, a pseudo-experimental fundamental antisymmetric dispersion curves A 0 were computed using numerical approach described in [2]. In this approach it is assumed that the dynamic problem is formulated as a plain strain problem and solved by numerical simulations via commercial finite element code Abaqus in a few series of modal analyzes.…”

Section: Numerical Experimentsmentioning

confidence: 99%

Bayesian Identification of Elastic Parameters in Composite Laminates Applying Lamb Waves Monitoring

Słoński¹

2015

Proceedings of the 5th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. In this paper we consider the problem of identification of elastic parameters of homogeneous, elastic and hexagonally orthotropic plates. The proposed solution of the identification problem is based on dispersion curves for Lamb waves propagating in free waveguides and Bayesian inference for sequential estimation of elastic parameters with uncertainty quantification. In particular we solve the problem by treating the unknown elastic parameters as state variables of a stationary dynamic system and formulating the sequential identification problem as a Bayesian state estimation problem. We solve the problem by using sequential Monte Carlo filter (a.k.a. particle filter). Finally, we present two case studies which correspond either to pseudo-experimental computer simulations or laboratory tests in which the elastic parameters of an aluminum thin plate are estimated. The results confirm that the proposed approach allows to find the unknown elastic parameters and that this approach is also useful for quantification of uncertainty with respect to the elastic parameters.4246

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“…There are many methods to investigate the propagation characteristics of guided waves in composite laminates. These method include the Transfer matrix method (TMM) [3,4], the Global matrix method (GMM) [5], the scattering matrix method(SMM) [6], the stiffness transfer matrix method(STMM) [1], reverberation-ray matrix method(RMMM) [7,8], the finite element method (FEM) [9][10][11], and the semi-analysis finite element method (SAFE) [12]. Guided waves propagation can then be found by imposing appropriate boundary.…”

Section: Introductionmentioning

confidence: 99%

Modelling guided waves in anisotropic plates using the Legendre polynomial method

Zheng

2017

MATEC Web Conf.

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Abstract.A numerical method to compute phase dispersion curve in unidirectional laminate is described. The basic feature of the proposed method is the expansion of fields quantities in single layer on different polynomial bases. The Legendre polynomial method avoid to solve the transcendental dispersion equation of guided wave. Guided waves that have very close propagation constants are calculated with great accuracy. Numerical solution of dispersion relation are calculated for guided waves propagation in orthotropic unidirectional fiber composites. The validation of the polynomial approach is depicted by a comparison between the associated solution and those obtained using Transfer matrix method.

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Extraction of dispersion curves for waves propagating in free complex waveguides by standard finite element codes

Cited by 83 publications

References 37 publications

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Ultrasonic Guided Wave Propagation through Welded Lap Joints

Bayesian Identification of Elastic Parameters in Composite Laminates Applying Lamb Waves Monitoring

Modelling guided waves in anisotropic plates using the Legendre polynomial method

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