Wave Dispersion and Attenuation in Viscoelastic Split Hopkinson Pressure Bar

Cheng, Zhijun; Crandall, Jeff R.; Pilkey, Walter D.

doi:10.1155/1998/906291

Cited by 20 publications

(16 citation statements)

References 11 publications

(18 reference statements)

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“…Several tests at different impact velocities were performed to apply the method described in section 2.2, using only the input bar. The incident, ε 1 , and reflected, ε 2 , waves were recorded and the procedure described followed to obtain the propagation coefficient, γ(ω), using expression (8), and its components: the attenuation coefficient, α(ω), and the phase number,…”

Section: Experimental Determination Of the Propagation Coefficient Usmentioning

confidence: 99%

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Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

et al. 2013

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Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test Citation for published version: Irausquín, I, Pérez-Castellanos, JL, Miranda, V & Teixeira-Dias, F 2013, 'Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test', Materials and Design, vol. 47, pp. 698-705. https://doi.Evaluation of the effect of the strain rate on the compressive response of a closedcell aluminium foam using the split Hopkinson pressure bar test I. Irausquín, J.L. Pérez-Castellanos, V. Miranda, F. Teixeira-Dias PII: S0261-3069(12)00879-5 DOI: http://dx.Please cite this article as: Irausquín, I., Pérez-Castellanos, J.L., Miranda, V., Teixeira-Dias, F., Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test, Materials and Design (2012), doi: http://dx. AbstractThe research here presented is focused on the evaluation of the dynamic behaviour of a closed-cell aluminium foam using the split Hopkinson pressure bar (SHPB) test. On a first approach, the influence of the material of the bars was studied and, as a consequence, polymethylmethacrylate (PMMA) was chosen as the most suitable material to be used in the bars and striker to test the specific aluminium foam considered. This set of bars was manufactured and several dynamic compression tests were carried out. The corresponding stress-strain behaviour was obtained and the dependence of mechanical parameters of the aluminium foam Alporas 10% on the strain rate was thoroughly analysed. It was possible to conclude that the material exhibits significant strain rate sensitivity, within the tested range of strain rates. The range of strain rate values where the compressive behaviour of the foam is different was also determined.

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Section: Experimental Determination Of the Propagation Coefficient Usmentioning

confidence: 99%

“…Propagation of waves in viscoelastic bars is prone to attenuation and dispersion, even if geometrical effects are not significant, so that, different methods have been developed to correct their effects on such a kind of materials [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

et al. 2013

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“…The subscript m refers to the mode of the solution and, generally, only the first mode is considered [17]. The transfer function determines the amount of phase shift and attenuation with respect to space.…”

Section: Hopkinson Bar Theorymentioning

confidence: 99%

Mechanical Properties of Ballistic Gelatin at High Deformation Rates

Salisbury

Cronin

2009

Exp Mech

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The characterization of soft or low impedance materials is of increasing importance since these materials are commonly used in impact and energy absorbing applications. The increasing role of numerical modeling in understanding impact events requires high-rate material properties, where the mode of loading is predominantly compressive and large deformations may occur at high rates of deformation. The primary challenge in measuring the mechanical properties of soft materials is balancing the competing effects of material impedance, specimen size, and rate of loading. The traditional Split Hopkinson Pressure Bar approach has been enhanced through the implementation of polymeric bars to allow for improved signal to noise ratios and a longer pulse onset to ensure uniform specimen deformation. The Polymeric Split Hopkinson Pressure Bar approach, including the required viscoelastic bar analysis, has been validated using independent measurement techniques including bar-end displacement measurement and high speed video. High deformation rate characterization of 10% and 20% ballistic gelatin, commonly used as a soft tissue simulant, has been undertaken at nominal strain rates ranging from 1,000 to 4,000/s. The mechanical properties of both formulations of gelatin exhibited significant strain rate dependency. The results for 20% gelatin are in good agreement with previously reported values at lower strain rates, and provide important mechanical properties required for this material.

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“…The first method is based on a theoretical viscoelastic constitutive equation and a characteristics theory of wave propagation (Bacon, 1998). An alternative approach is to use spectral analysis to correct wave pulses (Cheng et al, 1998;Zhao et al, 1997;Duyle, 1989). In this paper, spectral analysis and a wave shifting procedure are applied to a PMMA split Hopkinson pressure bar setup.…”

Section: Introductionmentioning

confidence: 99%

Tire rubber testing procedure over a wide range of strain rates

Baranowski

Janiszewski

Małachowski

2017

jtam

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The main aim of the paper is to present the procedure allowing one to determine correct mechanical characteristics of a rubber material compressed within a wide range of strain rates. In order to obtain a satisfactory wide spectrum of material data, a number of tests were conducted both under low and high strain rates with the use of a universal strength machine and split Hopkinson pressure bar set-up equipped with polymethyl methacrylate and 7075-T6 alloy bars. During the investigations, the necessity of performing pre-compression tests and the problem of specimen geometry were pointed out as key methodical requirements to guarantee achieving valid experimental data both from quasi-static and high strain rate tests.

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Wave Dispersion and Attenuation in Viscoelastic Split Hopkinson Pressure Bar

Cited by 20 publications

References 11 publications

Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

Evaluation of the effect of the strain rate on the compressive response of a closed-cell aluminium foam using the split Hopkinson pressure bar test

Mechanical Properties of Ballistic Gelatin at High Deformation Rates

Tire rubber testing procedure over a wide range of strain rates

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