3D simulation of dependence of mechanical properties of porous ceramics on porosity

Smolin, Alexey Yu.; Roman, N.V.; Konovalenko, Igor S.; Eremina, Galina M.; Buyakova, S. P.; Psakhie, S. G.

doi:10.1016/j.engfracmech.2014.04.001

Cited by 46 publications

(17 citation statements)

References 25 publications

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“…[1][2][3][4]. They can be divided into three areas: (i) modelling the porous structure per se; (ii) determining the effective properties of porous materials; (iii) direct numerical simulation of deformation and fracture of porous materials at different scales.…”

Section: Introductionmentioning

confidence: 99%

Brittle porous material mesovolume structure models and simulation of their mechanical properties

Smolin

Eremin

Макаров

et al. 2014

AIP Conference Proceedings

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Abstract.To study the mechanical response of brittle porous materials at mesoscale, porous samples were generated and their deformation was numerically modelled. Two types of pore space morphology such as overlapping spherical pores and overlapping spherical solids were explicitly considered. For deformation modelling, an evolutionary approach including the nonlinear constitutive equations used to describe damage accumulation and its impact on the degradation of the solid frame strength properties was applied. The numerical results have shown that an average stress-strain diagram is sensitive to pore morphology as well as porosity.

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Section: Introductionmentioning

confidence: 99%

Brittle porous material mesovolume structure models and simulation of their mechanical properties

Smolin

Eremin

Макаров

et al. 2014

AIP Conference Proceedings

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“…The movable cellular automata is a new efficient numerical method in particle mechanics that is different from methods in the traditional continuum mechanics [8][9][10]. Within the frame of movable cellular automata, it is assumed that any material is composed by a certain amount of elementary objects (automata), which interact among each other and can move from one place to another, thereby simulating a real deformation process.…”

Section: Model Descriptionmentioning

confidence: 99%

“…shear and bulk moduli. A distinguishing feature of the method is calculating of forces acting on the automata within the framework of multi-particle interaction [8][9][10], which provides for an isotropic behavior of the simulated medium. Moreover, stress tensor components could be calculated for the automaton taking into account all the forces acting on it [9,10], which enables the realization of various models of plasticity behavior developed in the frame of continuum mechanics.…”

Section: Model Descriptionmentioning

confidence: 99%

“…That is why the direct modeling of porous materials under mechanical loading is of high interest nowadays. Computational methods of continuum [2,3] and particle mechanics are used for this purpose [5][6][7][8]. Note that the methods based on particle approach allow correct modeling of deformation and have their advantages for modeling the fracture.…”

Section: Introductionmentioning

confidence: 99%

“…The purpose of this study was to reveal the influence of pore size on the dependence of the strength and elastic properties of porous ceramics on its porosity using a particle-based computational model [8]. This model is based on the method of movable cellular automata used herein for modeling porous ceramics samples in uniaxial compression.…”

Section: Introductionmentioning

confidence: 99%

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3D modeling of the mechanical behavior of ceramics with pores of different size

Smolin¹,

Eremina²,

Konovalenko³

et al. 2014

AIP Conference Proceedings

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Abstract. Movable cellular automaton method was used for simulating uniaxial compression of 3D porous ceramic samples. Pores were considered explicitly by removing randomly selected automata from the original FCC packing. Distribution of pores in space, their size and the total fraction were varied. It is shown that the relation between mechanical properties of the material and its porosity significantly depends on the pore size. Thus, value of the elastic modulus of the samples with large pores is greater than that of the samples with small pores by average value of 3%-16%. Strength value of the samples with large pores is less than that of the samples with small pores by average value of 12% up to the porosity of 0.55, and then becomes to be greater. When the samples contain small and large pores there is a maximum of mechanical properties at ratio of volumes of large and small pores of about 0.75.

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Morphologic Interpretation of Rock Failure Mechanisms Under Uniaxial Compression Based on 3D Multiscale High-resolution Numerical Modeling

Liang

Tang

2014

Rock Mech Rock Eng

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Multiscale continuous laboratory observation of the progressive failure process has become a powerful means to reveal the complex failure mechanism of rock. Correspondingly, the representative volume element (RVE)-based models, which are capable of micro/meso-to macro-scale simulations, have been proposed, for instance, the rock failure process analysis (RFPA) program. Limited by the computational bottleneck due to the RVE size, multiscale high-resolution modeling of rock failure process can hardly be implemented, especially for three-dimensional (3D) problems. In this paper, the self-developed parallel RFPA 3D code is employed to investigate the failure mechanisms and various fracture morphology of laboratory-scale rectangular prism rock specimens under unconfined uniaxial compression. The specimens consist of either heterogeneous rock with low strength or relatively homogeneous rock with high strength. The numerical simulations, such as the macroscopic fracture pattern and stressstrain responses, can reproduce the well-known phenomena of physical experiments. In particular, the 3D multiscale continuum modeling is carried out to gain new insight into the morphologic interpretation of brittle failure mechanisms, which is calibrated and validated by comparing the actual laboratory experiments and field evidence. The advantages of 3D multiscale high-resolution modeling are demonstrated by comparing the failure modes against 2D numerical predictions by other models. The parallel RVEbased modeling tool in this paper can provide an alternative way to investigate the complicated failure mechanisms of rock.

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3D simulation of dependence of mechanical properties of porous ceramics on porosity

Cited by 46 publications

References 25 publications

Brittle porous material mesovolume structure models and simulation of their mechanical properties

Brittle porous material mesovolume structure models and simulation of their mechanical properties

3D modeling of the mechanical behavior of ceramics with pores of different size

Morphologic Interpretation of Rock Failure Mechanisms Under Uniaxial Compression Based on 3D Multiscale High-resolution Numerical Modeling

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