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Hopkinson bar

Numerical Simulation on the specimen dynamic plastic deformation behaviour in the torsional split Hopkinson bar test

Numerical Simulation on the specimen dynamic plastic deformation behaviour in the torsional split Hopkinson bar test

... Abstract. The torsional split Hopkinson bar (SHB) is an important method to study the dynamic shear behaviour and shear localization of materials under high strain rates. Different specimen sizes were used ...

6

Study And  Preliminary Design Of High Speed Impact Test Machine Using Hopkinson Bar Test Principle

Study And Preliminary Design Of High Speed Impact Test Machine Using Hopkinson Bar Test Principle

... This method uses a hollow cylinder with an explosive core as a method of initiating a shock wave. The material to be tested is placed in a ring around the hollow cylinder. As the explosive is detonated, the shock wave ...

24

Compression, Tension and Shear Testing of Fibrous Composite with the Split Hopkinson Bar Technique

Compression, Tension and Shear Testing of Fibrous Composite with the Split Hopkinson Bar Technique

... Split Hopkinson Bar (SHB) technique is frequently used for testing metals at high strain rates in the range of 500 to 5,000 ...incident bar and a portion of the wave passes through the specimen to ...

6

Experimental issues and interpretation of the necking phenomena in the dynamic characterization via Hopkinson bar

Experimental issues and interpretation of the necking phenomena in the dynamic characterization via Hopkinson bar

... Abstract. The usual procedures for processing experimental data from Hopkinson bars (HB) are based on modeling hypotheses which, in some cases, may lead to considerable approximations. The effects of the specimen ...

6

Diagnostic techniques in deflagration and detonation studies

Diagnostic techniques in deflagration and detonation studies

... Table 1 shows the range of strain rates addressed in this review, along with the corresponding techniques. A review of techniques that have been applied over this range of strain-rates has been published by the authors ...

14

Impact Perforation of aluminum Cymat Foam

Impact Perforation of aluminum Cymat Foam

... Dynamic perforation of aluminum Cymat foam has been investigated experimentally and numerically. Impact perforation tests (up to around 40 m/s) were performed using an inverse perforation testing technique with a long, ...

6

Energy absorption at high strain rate of glass fiber reinforced mortars

Energy absorption at high strain rate of glass fiber reinforced mortars

... In this paper the effect of adding glass fibers on the dynamic behaviour of cementitious mortars was investigated. Dynamic tensile tests at high strain rate were performed by means of a Modified Tensile Hopkinson ...

5

Implementation of viscoelastic Hopkinson bars

Implementation of viscoelastic Hopkinson bars

... split Hopkinson pressure bar setup results in poor signal to noise ratios due to impedance ...polymeric Hopkinson bars. Conventional Hopkinson bar analysis cannot be used on the ...

6

Investigations on specimen design and mounting for Split Hopkinson Tension Bar (SHTB) experiments

Investigations on specimen design and mounting for Split Hopkinson Tension Bar (SHTB) experiments

... Split Hopkinson Bar (SHB) testing methods are often used for this range of strain ...output bar. The input bar is impacted with a projectile inducing a stress wave, which travels through the ...

6

Dynamic testing of old and young baboon cortical bone with numerical validation

Dynamic testing of old and young baboon cortical bone with numerical validation

... right femurs of 12 female baboons, (Papio hamadryas spp.) from the Texas Biomedical Research Institute / Southwest National Primate Research Center in San Antonio, Texas. The animals were divided into two age groups: a ...

5

Two-wave photon Doppler velocimetry measurements in direct impact Hopkinson pressure bar experiments

Two-wave photon Doppler velocimetry measurements in direct impact Hopkinson pressure bar experiments

... of Hopkinson Bar systems exist for compression experiments: Split Hopkinson Pressure Bars (SHPBs, also known as Kolsky Bars [1]) and Direct Impact systems (DIHBs) ...output bar as depicted in ...

6

Development of “Dropkinson” Bar for Intermediate Strain-rate Testing

Development of “Dropkinson” Bar for Intermediate Strain-rate Testing

... Dropkinson bar was developed in tension mode. As shown in Figure 1, a long Hopkinson bar was installed parallel to a drop ...1”-diameter Hopkinson bar and secured with a lock ...the ...

6

Development of a constitutive model for DPX2 explosive

Development of a constitutive model for DPX2 explosive

... As part of the work some Brazilian disc tests were performed at high rate using the standard disc geometry and rounded anvils placed between the input and output bars of the Hopkinson bar apparatus. The ...

6

Structural-temporal approach for dynamic strength characterization of gabbro-diabase

Structural-temporal approach for dynamic strength characterization of gabbro-diabase

... Abstract. This paper presents some of the results of dynamic compression, splitting and direct-tensile tests of gabbro-diabase using two split Hopkinson bar apparatus. The results of laboratory experiments ...

5

High strain rate response of UHP(FR)C in compression

High strain rate response of UHP(FR)C in compression

... The objective of this study was to investigate the compression behaviour of the UHPFRC and its matrix under high strain rate. Two experimental set-ups were used for compression testing: a traditional Split ...

6

Large scale high strain-rate tests of concrete

Large scale high strain-rate tests of concrete

... on Hopkinson bar techniques, for performing large scale dynamic tests of concrete ...split Hopkinson bar with a total length of approximately 200 m and with bar diameters of 72 ...

6

High rate loading of hybrid joints in a Split Hopkinson Tension Bar

High rate loading of hybrid joints in a Split Hopkinson Tension Bar

... Split Hopkinson Bar (SHB) technique the overall test setup geometry is very simple and the characteristic vibrations of the test frame (the elastic stress waves in the bars) are used as a basis of the force ...

6

Development of a Tensile Split Hopkinson Pressure Bar Testing Facility

Development of a Tensile Split Hopkinson Pressure Bar Testing Facility

... The loading device is composed of a gun and striker, used to generate the stress wave in the bar components. The gun either uses explosives or compressed gas to launch the striker bar into the incident ...

143

Modelling split-Hopkinson pressure bar tests on quartz sand

Modelling split-Hopkinson pressure bar tests on quartz sand

... modulus of 168 GPa and Poisson’s ratio 0.29, and are modelled using the material model *MAT_ELASTIC . The strain gauge readings from the physical experiment were used to assess the performance of the model, and so their ...

6

A Study of Dynamic Tensile Shear Strength of Adhesively Bonded Single Lap Joints at Different Loading Temperatures, Velocities and Adherent Thicknesses

A Study of Dynamic Tensile Shear Strength of Adhesively Bonded Single Lap Joints at Different Loading Temperatures, Velocities and Adherent Thicknesses

... split Hopkinson tensile bar has been carried out to determine the influences of temperature, velocity and adherent thickness on the dynamic tensile shear strength of the ...

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