Experimental Analysis of Visco-Plastic Properties of the Aluminium and Tungsten Alloys by Means of Hopkinson Bars Technique

Leopold Kruszka; Mariusz Magier; Mariusz Zielenkiewicz

doi:10.4028/www.scientific.net/AMM.566.110

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Identification Methods of Parameters for Johnson-Cook Constitutive Equation – Comparison
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Experimental Analysis of Visco-Plastic Properties of the Aluminium and Tungsten Alloys by Means of Hopkinson Bars Technique
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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 566Experimental Analysis of Visco-Plastic Properties...

Experimental Analysis of Visco-Plastic Properties of the Aluminium and Tungsten Alloys by Means of Hopkinson Bars Technique

Abstract:

The main aim of studies on dynamic behaviour of construction materials at high strain rates is to determine the variation of mechanical properties (strength, plasticity) as a function of the strain rate and temperature. On the basis of results of dynamic tests on the properties of constructional materials the constitutive models are formulated to create numerical codes applied to solve constructional problems with computer simulation methods. In the case of military applications connected with the phenomena of gunshot and terminal ballistics it's particularly important to develop a model of strength and armour penetration with KE projectile founded on reliable results of dynamic experiments and constituting the base for further analyses and optimization of projectile designs in order to achieve required penetration depth. Static and dynamic results of strength investigations of the EN AW-7012 aluminium alloy (sabot) and tungsten alloy (penetrator) are discussed in this paper. Static testing was carried out with the INSTRON testing machine. Dynamic tests have been conducted using the split Hopkinson pressure bars technique at strain rates up to 1,2·10⁴ s^-1 (for aluminium alloy) and 6·10³ s^-1(for tungsten alloy).

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Periodical:

Applied Mechanics and Materials (Volume 566)

Pages:

110-115

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.566.110

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Online since:

June 2014

Authors:

Leopold Kruszka*, Mariusz Magier, Mariusz Zielenkiewicz

Keywords:

Aluminium Alloy, Kolsky’s Bar, Tungsten

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