Generalization of split Hopkinson bar technique to use viscoelastic bars

Wang, Lili; Labibes, K.; Azari, Z.; Pluvinage, G.

doi:10.1016/0734-743x(94)90166-i

Cited by 140 publications

(61 citation statements)

References 2 publications

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“…PMMA bars have been used in previous SHPB studies (e.g. [26,27]); in these investigations the strain signals were large (about 1%) and viscoelastic wave theory was found to be necessary. In the present study the maximum strain in the PMMA transmitter bar was approximately 0.05%, and viscoelastic e!ects were shown to be negligible by the following preliminary test.…”

Section: Split Hopkinson Pressure Bar Arrangementmentioning

confidence: 99%

High strain rate compressive behaviour of aluminium alloy foams

Deshpande

Fleck

2000

International Journal of Impact Engineering

548

266

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The high strain rate compressive behaviour of two cellular aluminium alloys (Alulight and Duocel) has been investigated using the split Hopkinson pressure bar and direct impact tests. It is found that the dynamic behaviour of these foams is very similar to their quasi-static behaviour. The plateau stress is almost insensitive to strain rate, for strain rates up to 5000 s\ . Deformation is localised in weak bands in the Alulight foam but is spatially uniform for the Duocel foam, over the full range of strain rates 10\ s\ ) )5000 s\ .

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Section: Split Hopkinson Pressure Bar Arrangementmentioning

confidence: 99%

High strain rate compressive behaviour of aluminium alloy foams

Deshpande

Fleck

2000

International Journal of Impact Engineering

548

266

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“…titanium, magnesium alloy or aluminum, or a polymer, e.g. polymethylmethacrylate (PMMA), PC, or nylon [77][78][79][80][81][82][83][84][85][86][87][88]. Low impedance metallic bars do not require any changes to the experimental apparatus or data reduction.…”

Section: Dynamic Loading: Split Hopkinson Pressure Barmentioning

confidence: 99%

“…However, rubbers were some of the first materials to be characterized in split Hopkinson bar experiments [1,2], and more recently a number of authors have proposed techniques to address these difficulties through modifications to the Hopkinson bar or other similar systems [57,66]. These include pulse shaping [62], low impedance Hopkinson bar materials to increase the transmitted force [76,77,81,82,148] or use of more sensitive force gauges to directly measure the force at the specimen bar interface [62][63][64]. Longer Hopkinson bars may be used to increase the duration of the experiment [53], as can direct impact systems [149], in addition, if stress gauges are combined with optical measurements of specimen deformation, the experiment duration is no longer limited by wave overlapping in the bars and longer durations can be achieved [150].…”

Section: Rubbery Amorphous Polymersmentioning

confidence: 99%

High Strain Rate Mechanics of Polymers: A Review

Siviour

Jordan

2016

J. dynamic behavior mater.

273

121

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The mechanical properties of polymers are becoming increasingly important as they are used in structural applications, both on their own and as matrix materials for composites. It has long been known that these mechanical properties are dependent on strain rate, temperature, and pressure. In this paper, the methods for dynamic loading of polymers will be briefly reviewed. The high strain rate mechanical properties of several classes of polymers, i.e. glassy and rubbery amorphous polymers and semi-crystalline polymers will be reviewed. Additionally, time-temperature superposition for rate dependent large strain properties and pressure dependence in polymers will be discussed. Constitutive modeling and shock properties of polymers will not be discussed in this review.

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“…An SHPB set-up made of viscoelastic bars was implemented in order to cover the impedance mismatch disadvantage of soft specimens; however, the nature of viscoelasticity of the bar materials resulted in intensified wave dispersion and attenuation effects [8,9]. The use of hollow SHPB transmitter bars was also investigated but it did not affect the amplitude of the noise [10].…”

Section: Introductionmentioning

confidence: 99%

The effect of strain rate on the mechanical behavior of Teflon foam

2012

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a b s t r a c tThe quasi-static (1 Â 10 À3 , 1 Â 10 À2 and 1 Â 10 À1 s À1 ) and high strain rate (7200 and 9500 s À1 ) experimental and high strain rate numerical compression deformation of a Gore PolarchipÔ CP7003 heat insulating Teflon foam was investigated. High strain rate tests were conducted with the insertion of quartz crystal piezoelectric transducers at the end of the transmitter bar of a compression Split Hopkinson Pressure Bar (SHPB) set-up in order to measure the force at the back face of the specimen. A fully developed numerical model of the SHPB test on Teflon was also implemented using LS-DYNA. The simulation stresses showed close correlations with the experimentally measured stresses on the bars. The developed model successfully simulated the high strain rate loading. The damage initiation and progression of experimental high strain rate tests were further recorded using a high speed camera and found to be very similar to those of the simulation high strain rate tests.

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Generalization of split Hopkinson bar technique to use viscoelastic bars

Cited by 140 publications

References 2 publications

High strain rate compressive behaviour of aluminium alloy foams

High strain rate compressive behaviour of aluminium alloy foams

High Strain Rate Mechanics of Polymers: A Review

The effect of strain rate on the mechanical behavior of Teflon foam

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