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Geometric and finite element modeling of biopolymer aerogels to characterize their microstructural and mechanical properties

Chandrasekaran, Rajesh and Hillgärtner, Markus and Rege, Ameya Govind and Milow, Barbara and Itskov, Mikhail (2021) Geometric and finite element modeling of biopolymer aerogels to characterize their microstructural and mechanical properties. Proceedings in Applied Mathematics and Mechanics, 21 (1), e202100122. Wiley. doi: 10.1002/pamm.202100122. ISSN 1617-7061.

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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/pamm.202100122

Abstract

Biopolymer aerogels belong to a class of highly open-porous cellular materials. Their macroscopic mechanical properties (such as elasticity or thermal conductivity) depend on microstructural features (namely pore size distribution (PSD), fiber diameter and solid fraction), which can be tailored by different synthesis and drying routes. The design of modern aerogel materials requires a better perception into the microstructure and its influence on the mechanical properties. To predict the material properties using simulation, it is significant to construct a geometric model which is sufficiently precise to represent the microstructure of real materials. A tessellation approach based on Voronoi diagrams is a powerful tool to model such cellular-like materials. In this contribution, the diversified cellular morphology of aerogels is described computationally using a Voronoi tessellation-based approach [1]. Accordingly, Voronoi tessellations are generated to create periodic representative volume elements (RVEs) resembling the microstructural properties of the cellular network. Stress-strain curves resulting from finite element simulations of these RVEs and experiments of the aerogels under compression are compared. This work is an extension of our previous Voronoi tessellation-based on the 2-d description of biopolymer aerogels [2].

Item URL in elib:https://elib.dlr.de/148431/
Document Type:Article
Title:Geometric and finite element modeling of biopolymer aerogels to characterize their microstructural and mechanical properties
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Chandrasekaran, RajeshRWTH Aachen UniversityUNSPECIFIED
Hillgärtner, MarkusRWTH Aachen UniversityUNSPECIFIED
Rege, Ameya GovindAmeya.Rege (at) dlr.dehttps://orcid.org/0000-0001-9564-5482
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Itskov, MikhailRWTH AachenUNSPECIFIED
Date:14 December 2021
Journal or Publication Title:Proceedings in Applied Mathematics and Mechanics
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:21
DOI :10.1002/pamm.202100122
Page Range:e202100122
Publisher:Wiley
ISSN:1617-7061
Status:Published
Keywords:biopolymer aerogel, laguerre-voronoi, finite element model, reconstruction
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Rege, Dr. Ameya Govind
Deposited On:24 Jan 2022 09:07
Last Modified:24 Jan 2022 09:07

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