Numerical Study of Dynamic Properties of Fractional Viscoplasticity Model

Szymczyk, Michał; Nowak, Marcin; Sumelka, Wojciech

doi:10.3390/sym10070282

Cited by 9 publications

(2 citation statements)

References 33 publications

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“…It is worth mentioning that the other original approach presented in [40,41] leads to the analysis of anisotropic yield condition with application of fractional calculus. It might open a possibility of the energy-based Burzyński limit criterion as a basis for fractional formulation of viscoplasticity and plasticity models.…”

Section: Discussionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Pȩcherski¹,

Rusinek²,

Frąś³

et al. 2020

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The aim of the paper is to formulate physically well founded yield condition for initially anisotropic solids revealing the asymmetry of elastic range. The initial anisotropy occurs in material primarily due to thermo-mechanical pre-processing and plastic deformation during the manufacturing processes. Therefore, materials in the "as-received" state become usually anisotropic. After short account of the known limit criteria for anisotropic solids and discussion of mathematical preliminaries the energy-based criterion for orthotropic materials was formulated and confronted with experimental data and numerical predictions of other theories. Finally, possible simplifications are discussed and certain model of isotropic material with yield condition accounting for a correction of shear strength due to initial anisotropy is presented. The experimental verification is provided and the comparison with existing approach based on the transformed-tensor method is discussed.

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Section: Discussionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Pȩcherski¹,

Rusinek²,

Frąś³

et al. 2020

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show abstract

“…Innovative thermal measurement techniques could not only be used in ballistics, but in related dynamic areas too. Those techniques could be adopted in scientific studies regarding blast studies [ 18 , 19 , 20 ] but also in research regarding constitutive frameworks, such as [ 21 , 22 ]. Finally, the ballistic studies could be enhanced by thermal techniques, for instance in [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Temperature Measurement of a Bullet in Flight

Kerampran

Gajewski

Sielicki

2020

Sensors

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This study answers a primary question concerning how the temperature changes during the flight of a bullet. To answer the question, the authors performed unique research to measure the initial temperatures of bullet surfaces and applied it to four kinds of projectiles in a series of field experiments. The technique determines the temperature changes on metallic objects in flight that reach a velocity of 300 to 900 m/s. Until now, the tests of temperature change available in the literature include virtual points that are adopted to ideal laboratory conditions using classic thermomechanical equations. The authors conducted the first study of its kind, in which is considered four projectiles in field conditions in which a metallic bullet leaves a rifle barrel after a powder deflagration. During this process, heat is partly transferred to the bullet from the initial explosion of the powder and barrel-bullet friction. In this case, the temperature determination of a bullet is complex because it concerns different points on the external surface. Thus, for the first time the authors measured the temperatures at different position on the bullet surface. Moreover, the authors showed that basic thermodynamic equations allow for the credible prediction of such behavior if the initial conditions are identified correctly. This novel identification of the initial conditions of temperature and velocity of flying bullets was not presented anywhere else up to now.

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Fractional viscoplastic model for soils under compression

Sun

Sumelka

2019

Acta Mech

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Numerical Study of Dynamic Properties of Fractional Viscoplasticity Model

Cited by 9 publications

References 33 publications

Archives of Metallurgy and Materials

Archives of Metallurgy and Materials

Temperature Measurement of a Bullet in Flight

Fractional viscoplastic model for soils under compression

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