Mechanical behavior of porous zirconium dioxide under active deformation by compression

Buyakova, S. P.; Wei, Han; Dunmy, Li; Chen, Haiyun; Sablina, T. Yu.; Мельников, А. Г.; Кулъков, С. Н.

doi:10.1134/1.1262602

Cited by 7 publications

(12 citation statements)

References 1 publication

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“…The dimensions of sample are 300 Â 300 mm. Response function of the automata modeling ceramics [3,4] corresponds to elastic-brittle material (like curve 2 in Fig. 6(b)), response function of the automata modeling gel corresponds to elasticeplastic material with bilinear hardening (like curve 1 in Fig.…”

Section: Study Of Porous Ceramics With Gelmentioning

confidence: 99%

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Modeling mechanical behaviors of composites with various ratios of matrix–inclusion properties using movable cellular automaton method

et al. 2015

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Two classes of composite materials are considered: classical metaleceramic composites with reinforcing hard inclusions as well as hard ceramics matrix with soft gel inclusions. Movable cellular automaton method is used for modeling the mechanical behaviors of such different heterogeneous materials. The method is based on particle approach and may be considered as a kind of discrete element method. The main feature of the method is the use of many-body forces of inter-element interaction within the formalism of simply deformable element approximation. It was shown that the strength of reinforcing particles and the width of particle-binder interphase boundaries had determining influence on the service characteristics of metaleceramic composite. In particular, the increasing of strength of carbide inclusions may lead to significant increase in the strength and ultimate strain of composite material. On the example of porous zirconia ceramics it was shown that the change in the mechanical properties of pore surface leads to the corresponding change in effective elastic modulus and strength limit of the ceramic sample. The less is the pore size, the more is this effect. The increase in the elastic properties of pore surface of ceramics may reduce its fracture energy.

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Section: Study Of Porous Ceramics With Gelmentioning

confidence: 99%

“…ZrO 2 (Y 2 O 3 ) based ceramics was used as a matrix [3,4]. There are three maxima in pore size distribution bar chart for this material: 1 mm; 2 mm (comparable with grain size); 6 mm (cells).…”

Section: Study Of Porous Ceramics With Gelmentioning

confidence: 99%

Modeling mechanical behaviors of composites with various ratios of matrix–inclusion properties using movable cellular automaton method

et al. 2015

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“…It was supposed that all pores in the ceramics under investigation, as well as the model material, were equiaxed. The pore size of the model material, according to the maximum of the ceramics pore size distribution function, was equal to 3 μm [2,3]. Diameter of the movable cellular automata, according to the average grain size, was equal to 1 μm [2,3].…”

Section: Response Functionmentioning

confidence: 99%

“…t is well known that real porous materials are characterized by hierarchical pore structure and complex mechanical behavior, including fracture [1][2][3]. To study and describe these materials the information about the relationship of their structure and mechanical properties at various scales is needed.…”

Section: Introductionmentioning

confidence: 99%

“…Note, that this method have been chosen because it has successfully proved itself in studying I mechanical behavior of brittle porous materials from initiation of the first damages till cracks propagation and complete failure [6][7][8][9]. The calculations were carried out for a model material having mechanical properties of nanocrystalline ZrO 2 (Y 2 O 3 ) (yttria-stabilized zirconia) with the average pore size greater than the average grain size and two maxima in its pore size distribution function [2,3]. The hierarchical model of the material with properties of the ceramics under consideration was constructed in several stages.…”

Section: Introductionmentioning

confidence: 99%

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Multiscale approach to description of deformation and fracture of brittle media with hierarchical porous structure on the basis of movable cellular automaton method

Konovalenko¹,

Smolin²,

Psakhie³

2013

Frattura Ed Integrità Strutturale

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An approach to multiscale description of deformation and fracture of brittle porous materials on the basis of movable cellular automaton method was proposed. The material characterized by pore size distribution function having two maxima was considered. The core of the proposed approach consists in finding the automaton effective response function by means of direct numerical simulation of representative volume of the porous material. A hierarchical two-scale model of mechanical behavior of ceramics under compression and shear loading was developed. Zirconia based ceramics with pore size greater than the average grain size was considered. At the first scale of the model only small pores (corresponding to the first maximum of the pore size distribution function) were taking into account explicitly (by removing automata from the initial structure). The representative volume and effective elastic properties of the porous material at this scale were evaluated. At the second scale of the model, big pores were taking into account explicitly, the parameters of the matrix corresponded to the ones determined at the first scale. Simulation results showed that the proposed multiscale model allows qualitatively and quantitatively correct describing of deformation and fracture of brittle material with hierarchical porous structure.

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A mathematical model of particle–particle interaction for discrete element based modeling of deformation and fracture of heterogeneous elastic–plastic materials

Psakhie

Shilko

Grigoriev

et al. 2014

Engineering Fracture Mechanics

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Mechanical behavior of porous zirconium dioxide under active deformation by compression

Cited by 7 publications

References 1 publication

Modeling mechanical behaviors of composites with various ratios of matrix–inclusion properties using movable cellular automaton method

Modeling mechanical behaviors of composites with various ratios of matrix–inclusion properties using movable cellular automaton method

Multiscale approach to description of deformation and fracture of brittle media with hierarchical porous structure on the basis of movable cellular automaton method

A mathematical model of particle–particle interaction for discrete element based modeling of deformation and fracture of heterogeneous elastic–plastic materials

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