The Effect of Specimen Dimension on the Results of the Split-hopkinson Tension Bar Testing

Prabowo, Dini A.; Kariem, Muhammad Agus; Gunawan, Leonardo

doi:10.1016/j.proeng.2016.12.114

Cited by 13 publications

(4 citation statements)

References 5 publications

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“…e development of a method to test material to be in tension under high strain-rates (later called Split Hopkinson Tension Bar, SHTB) was introduced a decade later after the SHPB [51,52]. e progress in using SHTB was very slow due to difficulties inherent in sample design, load application, and data interpretation.…”

Section: ) Split-hopkinson Tension Bar (Shtb)mentioning

confidence: 99%

Experimental and Numerical Simulation to Validate Critical Perforation Velocity on a Flat Plate Aluminium Alloy 6061

Yadav

Jahangiri

Singh

2022

Advances in Materials Science and Engineering

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Aluminium 6061 (Al6061) alloy, which is known as commercial alloy, is massively used in aviation and automobile industries. Therefore, research on Al6061 alloy is gaining significance among scientists and researchers all over the world as it provides light weight, high strength and stiffness, high impact, and corrosion resistance in engineering applications. The comprehensive analysis of mechanical behavior under large stress-strain deformation responses of the alloy is studied over a wide range of strain-rates such as 1 × 10−3 s−1, 1 × 103 s−1, 2 × 103 s−1, and 3 × 103 s−1 under room temperature to elevated temperatures of 100°C and 200°C. In this regard, this study aims to evaluate the Johnson–Cook strength and fracture constants utilizing the Johnson–Cook constitutive model equations. Furthermore, the evaluated constant parameters have been used to perform numerical simulation analysis utilizing ABAQUS/CAE software. According to the study’s findings, the critical perforation velocity was found to be 70 ms−1 when a flat-nosed bullet (45 mm length and 12 mm diameter) made of stainless steel weighing 50 grams was fired normally to the center of a square plate specimen of Al6061 alloy. The specimen of the square flat plate was prepared with side 205 mm and 2 mm thickness (205 × 205 × 2 mm3). A good correlation for critical perforation velocity of experimental acquisition data and numerical simulation results has been found. These findings increase the knowledge of the material’s response application to the high-velocity impact that can be used in arms-ammunition, aviation, marine, automobile, and home appliances.

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Section: ) Split-hopkinson Tension Bar (Shtb)mentioning

confidence: 99%

Experimental and Numerical Simulation to Validate Critical Perforation Velocity on a Flat Plate Aluminium Alloy 6061

Yadav

Jahangiri

Singh

2022

Advances in Materials Science and Engineering

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“…On the other hand, the THEDS geometry requires properly shaped bar ends (as well as double threaded ends specimen) that can be obtained by wire electrical-discharge machining, as reported in Figure 1b that presents a diagram of the sample-bar assembly. The cyan component (2) is simply an alignment tool and, therefore, does not contribute to the load transmission, unless adhesive is used. Figure 2 reports the final realization of the THEDS b a geometry with a fixtures example (Figure 2a) and the components for quasi-static/low strainrate test performed on a universal testing machine (MTS 810).…”

Section: Tensile Hopkinson Extruded Design Sample (Theds)mentioning

confidence: 99%

“…This solution minimizes the mass of the specimen and guarantees a robust connection to the equipment bars. Several numerical studies assessed the performances of this topology and provided indications to optimize it in different testing conditions and for different materials (see [2] for an example). The two main drawbacks of this configuration are related to specimen manufacturing and test operation.…”

Section: Introductionmentioning

confidence: 99%

Development of an innovative specimen geometry for tensile split Hopkinson tests

Peroni

Croteau²,

Cantergiani³

2021

EPJ Web Conf.

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Specimen manufacturing is one of the critical issues to solve during a dynamic material characterization, especially by mean of the Hopkinson bar technique. In particular, concerning tensile testing, the sample is generally axisymmetric with two threaded ends to directly connect it to the Hopkinson bars. In this context, this work presents the development of an innovative sample geometry and related fixtures that can be widely adopted when conventional manufacturing procedures are problematic or when there are numerous specimens. The Tensile Hopkinson Extruded Design Sample (THEDS) geometry requires properly shaped bar ends that can be obtained by wire electrical-discharge machining. The THEDS geometry has been efficiently applied to a test campaign on electron-beam welded copper and niobium specimens. The performances of the developed geometry have first been assessed using digital image correlation (DIC) to compare the results obtained at quasi-static and intermediate velocities with a standard tensile specimen geometry. Secondly, dynamic tests at up to about 1000 s-1 have been performed with a modified Hopkinson bar system at the European Commission (JRC) using the THEDS geometry.

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“…Also, the geometry and dimension of specimens have important effect on material characteristics. Prabowo et al [8] conducted the influence of specimen geometry on the material dynamic behavior using LS -DYNA software. The research applied on three different geometry material of dumbbell shape like ASTM A370 for 6, 8, and 8 of gage length with different diameter size using Johnsoncook model and the result showing the ratio of (L/d =0.75) having perfect strain and stress characteristics.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of a Split Hopkinson Pressure Bar Test

Aljohani

Othman

Almitani

2021

EJERS

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In this work, a one-dimensional simplified model was developed to predict stress, strain, and strain-rate in high strain rates Hopkinson pressure bar experiments, namely, between 500-5000/s. To this goal, a one-dimensional model for Hokinson bar tests was developed based on analyses of wave propagation in bars and assuming the specimen is under equilibrium during the test. The numerical tool implemented using Matlab and validated regarding experimental data. This new model will be very helpful in designing the specimens for split Hopkinson bar tests and also in the interpretation of the experimental raw data.

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The Effect of Specimen Dimension on the Results of the Split-hopkinson Tension Bar Testing

Cited by 13 publications

References 5 publications

Experimental and Numerical Simulation to Validate Critical Perforation Velocity on a Flat Plate Aluminium Alloy 6061

Experimental and Numerical Simulation to Validate Critical Perforation Velocity on a Flat Plate Aluminium Alloy 6061

Development of an innovative specimen geometry for tensile split Hopkinson tests

Numerical Modeling of a Split Hopkinson Pressure Bar Test

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