Finite element modeling of transient ultrasonic waves in linear viscoelastic media

Stucky, Paul; Lord, W.

doi:10.1109/58.895895

Cited by 18 publications

(5 citation statements)

References 28 publications

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“…Compared to the Kelvin-Voigt model, the Maxwell model is more suited to model damping in soil (Stucky and Lord 2001). In most cases, the Biot hysteretic model (FIG.…”

Section: The Viscoelastic Materials Modelmentioning

confidence: 99%

Properties of soils using laboratory seismic methods and numerical modelling

Cheng¹

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CHAPTER 4: Finite Element Modelling 4.1 Outline and Purpose 4.2 Introduction to LS-DYNA 4.3 Calibration for stiffness response 4.3.1 The Timoshenko beam effect 4.3.2 Verification of the finite element model 102 4.3.3 Finite element simulation program 104 4.3.4 Correction factor for the Timoshenko beam effect 105 4.3.5 Validation of correction factor χ m 108 4.4 Calibration for damping response 114 4.4.1 The Viscoelastic material model 114 4.4.2 Input Parameters for Viscoelastic Model 118 4.4.3 Finite element simulation program 120 4.4.4 Calibration of viscoelastic model using simulated resonant column test 122 4.4.5 Wave Propagation in a semi-infinite medium 125 4.5 Simulations for the Verification of the Hilbert Transform Method 128

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“…Compared to the Kelvin-Voigt model, the Maxwell model is more suited to model damping in soil (Stucky and Lord 2001). In most cases, the Biot hysteretic model (FIG.…”

Section: The Viscoelastic Materials Modelmentioning

confidence: 99%

Properties of soils using laboratory seismic methods and numerical modelling

Cheng¹

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“…Neben der Signifikanz im Bereich der Materialwissenschaften werden in aktuellen Publikationen auch Implementierungen für FEM-Simulationen dargestellt [32,42,62]. Die Materialgleichung im Frequenzbereich lautet:…”

Section: Viskoelastizität In Einer Dimensionunclassified

Viskoelastizität und Anisotropie von Kunststoffen: Ultraschallbasierte Methoden zur Materialparameterbestimmung

Bause

Claes

Webersen

et al. 2017

Tm - Technisches Messen

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ZusammenfassungIn diesem Beitrag werden verschiedene Aspekte der ultraschallbasierten Messtechnik hinsichtlich der Materialparameterbestimmung an viskoelastischen Materialien behandelt. Zunächst wird ein viskoelastisches Materialmodell unter Berücksichtigung von Anisotropie und Kausalität erarbeitet. Nachfolgend werden zwei verschiedene Verfahren zur Charakterisierung von Materialparametern anhand von geführten Ultraschallwellen in zylindrischen und plattenförmigen Strukturen vorgestellt sowie Vor- und Nachteile diskutiert. Dabei wird ebenso auf die Betrachtung von Materialalterung eingegangen. Beispielhaft untersucht werden thermoplastische Materialien wie Polypropylen und Polyamid 6. Zur Charakterisierung starker Anisotropie wird auch auf glasfaserverstärkte Plattenstrukturen mit thermoplastischer Matrix eingegangen.

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“…It has been shown that the fractional Zener model is suitable for describing a wide range of materials [12,13,26,27]. Besides its significance in the field of material science, there is an increasing interest in the implementation of this model in the FEM [28][29][30]. Its constitutive equation reads as follows:…”

Section: Basic Principles In One Dimensionmentioning

confidence: 99%

Ultrasonic transmission measurements in the characterization of viscoelasticity utilizing polymeric waveguides

Bause

Rautenberg

Feldmann

et al. 2016

Meas. Sci. Technol.

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For the numerical simulation of acoustic wave propagation in (measurement) systems and their design, the use of reliable material models and material parameters is a central issue. Especially in polymers, acoustic material parameters cannot be evaluated based on quasistatically measured parameters, as are specified in data sheets by the manufacturers.In this work, a measurement method is presented which quantifies, for a given polymeric material sample, a complex-valued and frequency-dependent material model. A novel threedimensional approach for modeling viscoelasticity is introduced. The material samples are designed as hollow cylindrical waveguides to account for the high damping characteristics of the polymers under test and to provide an axisymmetric structure for good performance of waveguide modeling and reproducible coupling conditions arising from the smaller coupling area in the experiment. Ultrasonic transmission measurements are carried out between the parallel faces of the sample. To account for the frequency dependency of the material properties, five different transducer pairs with ascending central frequency from 750 kHz to 2.5 MHz are used. After passing through the sample, each of the five received signals contains information on the material parameters which are determined in an inverse procedure. The solution of the inverse problem is carried out by iterative comparison of an innovative forward SBFEM-based simulations of the entire measurement system with the experimentally determined measurement data. For a given solution of the inverse problem, an estimate of the measurement uncertainty of each identified material parameter is calculated.Moreover, a second measurement setup, based on laser-acoustic excitation of Lamb modes in plate-shaped specimens, is presented. Using this setup, the identified material properties can be verified on samples with a varied geometry, but made from the same material.

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Finite element modeling of transient ultrasonic waves in linear viscoelastic media

Cited by 18 publications

References 28 publications

Properties of soils using laboratory seismic methods and numerical modelling

Properties of soils using laboratory seismic methods and numerical modelling

Viskoelastizität und Anisotropie von Kunststoffen: Ultraschallbasierte Methoden zur Materialparameterbestimmung

Ultrasonic transmission measurements in the characterization of viscoelasticity utilizing polymeric waveguides

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