Transient waves in viscoelastic cylindrical layered media

Abu-Alshaikh, Ibrahim; Turhan, D.; Mengi, Y.

doi:10.1016/s0997-7538(02)01238-x

Cited by 5 publications

(6 citation statements)

References 39 publications

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“…Previous studies have shown that wave propagation in cylindrically layered media is determined by scattering effects generated by the refractions and reflections at the interfaces of the internal layers and boundaries. [71] Here, the simulation verified that these scattering effects from the internal layers contribute to the circumferential waves that were measured in a pulse-echo setup. We were interested in using pulse-echo to eliminate the additional complexity and alignment challenges of using two phase array transducers, as would be required in a pitch-catch setup.…”

Section: Ultrasound Wave Propagationsupporting

confidence: 69%

Quantitative Ultrasound Spectroscopy for Screening Cylindrical Lithium‐Ion Batteries for Second‐Life Applications

Montoya‐Bedoya,

Garcia‐Tamayo,

Rohrbach

et al. 2024

Batteries & Supercaps

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Diagnosing lithium‐ion battery degradation is a crucial part of managing energy storage systems. Recent research has explored ultrasonic testing for non‐invasive health assessment as an alternative to traditional, time‐consuming, electrical‐only methods. Assessing the state of health is vi‐ tal for determining quality at end of ‘first’ life, with retired batteries at 70−80% health still holding value for second‐ life applications. Over the coming years, tens of GWh of salvaged batteries will hit the market, requiring rapid non‐ invasive methods to classify retired batteries according to their state of health. This study uses a 64−element ultrasonic array to obtain mid‐band quantitative ultrasound spectroscopy parameters—including mid‐band fit, spectral slope, and intercept—from circumferential waves around cylindrical batteries. Thirteen cylindrical cells were used to evaluate the methodology: three pristine and ten retired from the same source. The mid‐band fit showed the ability to track the state of charge and discriminate between the state of health levels in accelerated degradation experiments both with pristine batteries, and also with recovered second‐ life batteries with unknown historical use. Linear‐array ultrasonic transducers, coupled with quantitative spectral parameters, show promise for future non‐destructive battery health screening methods, offering valuable insights for the emerging used battery market.

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Section: Ultrasound Wave Propagationsupporting

confidence: 69%

Quantitative Ultrasound Spectroscopy for Screening Cylindrical Lithium‐Ion Batteries for Second‐Life Applications

Montoya‐Bedoya,

Garcia‐Tamayo,

Rohrbach

et al. 2024

Batteries & Supercaps

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“…In [1] the authors used the combination of the Fourier transform and the method of characteristics to obtain the response of a multilayered viscoelastic medium to a dynamic out-of-plane shear traction. The same methods are used by the authors in [2] for the investigation of two-dimensional transient waves in cylindrical layered media composed of N isotropic homogeneous layers. The method of characteristics is also used in [3].…”

Section: Introductionmentioning

confidence: 99%

Propagation of Non-Stationary Waves in Viscoelastic Strip Composed of Orthotropic Layers

Adámek¹,

Valeš²,

Červ³

2017

Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Abstract. The analytical solution for transient waves caused by transverse impact on an infinite layered strip with free-free boundaries is presented in this work. The strip is composed of two horizontal layers of different heights. The materials of both layers are assumed to be linear viscoelastic and orthotropic. The case of special orthotropy is assumed for simplicity. The dissipative behaviour of each layer is modelled by the discrete model of standard linear viscoelastic solid in Zener configuration. The solving procedure used in this work follows the methods applied in previously published works dealing with the problems of a viscoelastic orthotropic strip and the symmetric case of a layered strip. The system of four linear partial integro-differential equations describing the non-stationary state of plane stress in the strip is solved by means of integral transform method. Concretely, the Laplace transform in time domain and the Fourier transform in spatial domain are applied. As a results of this procedure, the final formulas for displacement components in both layers are derived in Laplace domain. These transforms contain eight spectra of Fourier integrals which can be found as the solution of the system of eight complex equations arising from boundary conditions of the problem. When the spectra are known, the resulting formulas for the Laplace transforms of displacement components are obtained.The presented new formulation of non-symmetric problem enables to study the wave phenomena in general two-layered solids of strip-like geometry and it is fundamental for solving a problem with arbitrary number of layers.

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“…In contrast, it is possible to measure wave attenuation versus frequency and to deduce variations of complex material moduli in given frequency domains, 9 and whether these moduli are frequency dependent or not, it is then straightforward to use them as input data in a frequency model. It may be possible to establish corresponding relaxation-time models, 10,11 but this can be quite difficult too. This paper presents the use of a commercially available FE code 8 for modeling the propagation and diffraction of torsional wave modes along metallic pipes coupled to solid elements.…”

Section: Introductionmentioning

confidence: 99%

Finite element modeling of torsional wave modes along pipes with absorbing materials

Castaings

Bacon

2006

The Journal of the Acoustical Society of America

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This paper describes the implementation of equations of dynamic equilibrium in a finite element ͑FE͒ code for modeling, in axisymmetry, the propagation of torsional wave modes along metallic pipes coupled to solid elements. Materials constituting either pipes and/or surrounding elements can be absorbing media, the absorption being caused by either their viscoelasticity or scattering on their internal structure ͑or both͒. Complex moduli are used as input data to equations of dynamic equilibrium, which are solved in the frequency domain rather than in the temporal domain. Their real and imaginary parts represent material elasticity and damping, respectively. A new definition of efficient and easy-to-implement absorbing regions that suppress undesired reflections from boundaries is proposed. The resolution of equations in the frequency domain, together with the use of absorbing regions, lead to significant reductions in the number of mesh elements and also in the number of iterations required for describing problems of propagation and scattering. Through two examples, the model is validated by successful comparisons of numerical predictions with experimental data. Then, a third example is presented to illustrate the importance of properly modeling waves damping when using FE models for setting-up or optimizing NDT techniques.

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Transient waves in viscoelastic cylindrical layered media

Cited by 5 publications

References 39 publications

Quantitative Ultrasound Spectroscopy for Screening Cylindrical Lithium‐Ion Batteries for Second‐Life Applications

Quantitative Ultrasound Spectroscopy for Screening Cylindrical Lithium‐Ion Batteries for Second‐Life Applications

Propagation of Non-Stationary Waves in Viscoelastic Strip Composed of Orthotropic Layers

Finite element modeling of torsional wave modes along pipes with absorbing materials

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