Homogenization of flow in inflatable periodic structures with nonlinear effects

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23520%2F25%3A43976054" target="_blank" >RIV/49777513:23520/25:43976054 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.compstruc.2025.107933" target="_blank" >https://doi.org/10.1016/j.compstruc.2025.107933</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.compstruc.2025.107933" target="_blank" >10.1016/j.compstruc.2025.107933</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Homogenization of flow in inflatable periodic structures with nonlinear effects

Popis výsledku v původním jazyce

The paper presents a new type of weakly nonlinear two-scale model of inflatable periodic poroelastic structures saturated by Newtonian fluids. The periodic microstructures incorporate fluid inclusions connected to the fluid channels by admission and ejection valves represented by a 0D model. This induces a nonlinearity in the macroscopic Biot-type model, whereby the Darcy flow model governs the fluid transport due to the channels. Moreover, the fluid channels consist of compartments separated by semipermeable membranes inducing the pressure discontinuity. The homogenized model is derived under the small deformation assumption, however the equilibrium is considered in the Eulerian frame. Deformation-dependent homogenized coefficients of the incremental poroelasticity constitutive law and the permeability are approximated using the sensitivity analysis, to avoid coupled two-scale iterations. Numerical simulations illustrate the inflation process over time. Example of a bi-material cantilever demonstrates the inflation induced bending. The proposed two-scale model is intended to provide a computational tool for designing of porous metamaterials for fluid transport, or shape morphing with various potential applications.

Název v anglickém jazyce

Homogenization of flow in inflatable periodic structures with nonlinear effects

Popis výsledku anglicky

The paper presents a new type of weakly nonlinear two-scale model of inflatable periodic poroelastic structures saturated by Newtonian fluids. The periodic microstructures incorporate fluid inclusions connected to the fluid channels by admission and ejection valves represented by a 0D model. This induces a nonlinearity in the macroscopic Biot-type model, whereby the Darcy flow model governs the fluid transport due to the channels. Moreover, the fluid channels consist of compartments separated by semipermeable membranes inducing the pressure discontinuity. The homogenized model is derived under the small deformation assumption, however the equilibrium is considered in the Eulerian frame. Deformation-dependent homogenized coefficients of the incremental poroelasticity constitutive law and the permeability are approximated using the sensitivity analysis, to avoid coupled two-scale iterations. Numerical simulations illustrate the inflation process over time. Example of a bi-material cantilever demonstrates the inflation induced bending. The proposed two-scale model is intended to provide a computational tool for designing of porous metamaterials for fluid transport, or shape morphing with various potential applications.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20302 - Applied mechanics

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

COMPUTERS &amp; STRUCTURES

ISSN

0045-7949

e-ISSN

1879-2243

Svazek periodika

317

Číslo periodika v rámci svazku

OCT 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

21

Strana od-do

107933

Kód UT WoS článku

001576876800001

EID výsledku v databázi Scopus

2-s2.0-105014031819