A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach

Andrey V. Dimaki, Evgeny V. Shilko, Sergei V. Astafurov, Sergei G. Psakhie

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Выдержка

We propose a numerical model of liquid-saturated porous material, based on a coupled approach combining a discrete elements method and finite difference method. An ensemble of discrete elements simulates processes of deformation of a porous solid and filtration of single-phase liquid in an interconnected network of "micropores". Mass transfer of a fluid between the "micropores" and "macropores" (the latter are considered as the areas between spatially separated and non-interacting discrete elements) is calculated on a finer grid superimposed on an ensemble of movable discrete elements. The developed model was applied to study a mechanical response of brittle samples with water-saturated pore volume. It has been shown that the strength of liquid-saturated samples is determined not only by strength properties of "dry" material and a pore pressure, but largely by sample geometry, deformation rate and characteristics of porosity of a material. We suggest a generalizing dependence of the uniaxial compressive strength of water-saturated permeable brittle material on the specific diameter of filtration channels, which is the ratio of the characteristic diameter of the filtration channels to the square root of the strain rate. Values of parameters of mentioned dependence are strongly connected with the character of the relation between pore volume and pressure of a liquid.

Язык оригиналаАнглийский
Название основной публикацииProceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015
ИздательInternational Center for Numerical Methods in Engineering
Страницы442-450
Число страниц9
ISBN (печатное издание)9788494424472
СостояниеОпубликовано - 2015
Событие4th International Conference on Particle-Based Methods, PARTICLES 2015 - Barcelona, Испания
Продолжительность: 28 сен 201530 сен 2015

Другое

Другое4th International Conference on Particle-Based Methods, PARTICLES 2015
СтранаИспания
ГородBarcelona
Период28.9.1530.9.15

Отпечаток

porous materials
continuums
porosity
fluids
liquids
brittle materials
compressive strength
water
strain rate
mass transfer
liquid phases
grids
geometry

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Цитировать

Dimaki, A. V., Shilko, E. V., Astafurov, S. V., & Psakhie, S. G. (2015). A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach. В Proceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015 (стр. 442-450). International Center for Numerical Methods in Engineering.

A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach. / Dimaki, Andrey V.; Shilko, Evgeny V.; Astafurov, Sergei V.; Psakhie, Sergei G.

Proceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015. International Center for Numerical Methods in Engineering, 2015. стр. 442-450.

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Dimaki, AV, Shilko, EV, Astafurov, SV & Psakhie, SG 2015, A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach. в Proceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015. International Center for Numerical Methods in Engineering, стр. 442-450, Barcelona, Испания, 28.9.15.
Dimaki AV, Shilko EV, Astafurov SV, Psakhie SG. A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach. В Proceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015. International Center for Numerical Methods in Engineering. 2015. стр. 442-450
Dimaki, Andrey V. ; Shilko, Evgeny V. ; Astafurov, Sergei V. ; Psakhie, Sergei G. / A theoretical investigation of a mechanical response of fluid-saturated porous materials based on a coupled discrete-continuum approach. Proceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015. International Center for Numerical Methods in Engineering, 2015. стр. 442-450
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AB - We propose a numerical model of liquid-saturated porous material, based on a coupled approach combining a discrete elements method and finite difference method. An ensemble of discrete elements simulates processes of deformation of a porous solid and filtration of single-phase liquid in an interconnected network of "micropores". Mass transfer of a fluid between the "micropores" and "macropores" (the latter are considered as the areas between spatially separated and non-interacting discrete elements) is calculated on a finer grid superimposed on an ensemble of movable discrete elements. The developed model was applied to study a mechanical response of brittle samples with water-saturated pore volume. It has been shown that the strength of liquid-saturated samples is determined not only by strength properties of "dry" material and a pore pressure, but largely by sample geometry, deformation rate and characteristics of porosity of a material. We suggest a generalizing dependence of the uniaxial compressive strength of water-saturated permeable brittle material on the specific diameter of filtration channels, which is the ratio of the characteristic diameter of the filtration channels to the square root of the strain rate. Values of parameters of mentioned dependence are strongly connected with the character of the relation between pore volume and pressure of a liquid.

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