Inelastic Flow and Failure of Metallic Solids. Material Effort: Study Across Scales

Pȩcherski, R.B.; Nalepka, Kinga; Frąś, Teresa; Nowak, Marcin

doi:10.1007/978-3-7091-1768-2_6

Cited by 9 publications

(12 citation statements)

References 45 publications

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“…The limit surface is defined by Burzyński paraboloid yield condition, Burzyński [10,11], Vadillo et al [13], Frąś et al [12], Pęcherski et al [14]. The additive decomposition of small strain tensor into elastic and inelastic part is given by following equation…”

Section: The Quasi-brittle Materials Model For Al 2 O 3 Foamsmentioning

confidence: 99%

“…In such a case the plasticity theory based on Huber-Mises-Hencky yield condition to describe inelastic behaviour of foams is not appropriate. The proper yield condition for brittle ceramic materials is related with paraboloid yield surface, (Burzyński [10,11], Vadillo et al [13], Frąś et al [12], Pęcherski et al [14]). The identification of the paraboloid yield surface requires two independent tests: tension and compression.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Nowak¹,

Nowak²,

Pȩcherski³

et al. 2015

Archives of Metallurgy and Materials

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The mechanical properties and numerical model of ceramic alumina open-cell foam, which is produced by the chemical method of gelcasting with different cell sizes (porosities) are presented. Geometric characteristics of real foam samples were estimated from tomographic and scanning electron microscopy images. Using this information, numerical foam model was proposed. A good agreement between the numerical model and the results elaborated from microtomography was obtained. To simulate the deformation processes the finite element program ABAQUS was used. The main goal of this computation was to obtain macroscopic force as a function of applied vertical displacement in compression test.As a result of numerical simulation of compression test of alumina foam for different values of porosity, the Young modulus and the strength of such foams were estimated.

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Section: The Quasi-brittle Materials Model For Al 2 O 3 Foamsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Nowak¹,

Nowak²,

Pȩcherski³

et al. 2015

Archives of Metallurgy and Materials

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“…The steel plates and the rubber layer are in contact due to the * AUTOMATIC_SURFACE_TO_SURFACE function representing the non-bonded target layers [ 28 ]. The frictionless condition is applied between all modelled parts because of a lack of accurate description [ 29 , 30 ].…”

Section: Numerical Modelling Of the Nera Laminates Upon Kep Impactsmentioning

confidence: 99%

Experimental and Numerical Study on a Non-Explosive Reactive Armour with the Rubber Interlayer Applied against Kinetic-Energy Penetrators—The ‘Bulging Effect’ Analysis

Frąś

2021

Materials

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The study concerns a protection system applied against kinetic-energy penetrators (KEPs) composed of steel plates sandwiching a rubber layer. Laminated steel-elastomer armours represent non-explosive reactive (NERA) armours that take advantage of a so-called ‘bulging effect’ to mitigate KEP projectiles. Upon an impact, the side steel plates deform together with the deforming rubber interlayer. Their sudden deformation (bulging) in opposite directions disturbs long and slender KEP projectiles, causing their fragmentation. The presented discussion is based on the experimental investigation, confirming that the long-rod projectiles tend to fracture into several pieces due to the armour perforation. A numerical simulation accompanies the ballistic test providing an insight into the threat/target interactions. The presented experimental–numerical study explains the principles of the analysed protection mechanism and proves the efficiency of the materials composition making up the laminated non-reactive protection system.

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“…The elastic limit surface of solid alumina is described by Burzyński criterion (Burzyński [9,10], Pęcherski et al [12]). According to the original proposition of W. Burzyński the limit condition in terms of elastic energy density is proposed as the hypothesis of variable limit energy of volume change and distortion:…”

Section: Materials Model Of Solid Aluminamentioning

confidence: 99%

“…Vadillo et al [11] in application to metal plasticity. In particular within the context of ceramic foams the energy-based theory leads to an ellipsoidal limit elastic condition, Pęcherski et al [12], Zhang et al [13]. The proposed method of assessment of failure strength of real alumina foam is compared and validated with analytical Gibson method and experimental data.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Nowak¹,

Nowak²,

Pȩcherski³

et al. 2018

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The subject of the study are alumina foams produced by gelcasting method. The results of micro-computed tomography of the foam samples are used to create the numerical model reconstructing the real structure of the foam skeleton as well as the simplified periodic open-cell structure models. The aim of the paper is to present a new idea of the energy-based assessment of failure strength under uniaxial compression of real alumina foams of various porosity with use of the periodic structure model of the same porosity. Considering two kinds of cellular structures: the periodic one, for instance of fcc type, and the random structure of real alumina foam it is possible to justify the hypothesis, computationally and experimentally, that the same elastic energy density cumulated in the both structures of the same porosity allows to determine the close values of fracture strength under compression. Application of finite element computations for the analysis of deformation and failure processes in real ceramic foams is time consuming. Therefore, the use of simplified periodic cell structure models for the assessment of elastic moduli and failure strength appears very attractive from the point of view of practical applications.

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Inelastic Flow and Failure of Metallic Solids. Material Effort: Study Across Scales

Cited by 9 publications

References 45 publications

Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Mechanical Properties Of The Ceramic Open-Cell Foams Of Variable Cell Sizes

Experimental and Numerical Study on a Non-Explosive Reactive Armour with the Rubber Interlayer Applied against Kinetic-Energy Penetrators—The ‘Bulging Effect’ Analysis

Archives of Metallurgy and Materials

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