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Influence of pore-size distributions and pore-wall mechanics on the mechanical behavior of cellular solids like aerogels

Rege, Ameya Govind and Aney, Shivangi and Milow, Barbara (2021) Influence of pore-size distributions and pore-wall mechanics on the mechanical behavior of cellular solids like aerogels. Physical Review E, 103 (4), 043001. American Physical Society. doi: 10.1103/PhysRevE.103.043001. ISSN 2470-0045.

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Official URL: https://journals.aps.org/pre/abstract/10.1103/PhysRevE.103.043001

Abstract

The pore-size distributions play a critical role in the determination of the properties of nanoporous cellular materials like aerogels. In this paper, we propose a micromechanical model, and by further designing artificial normal pore-size distributions, we inspect their effect on the macroscopic stress-strain curves. We show that the location of the mean pore size as well as the broadness of the distribution strongly affects the overall macroscopic behavior. Moreover, we also show that by using different damage criteria within the proposed model, the elastic, inelastic, and brittle nature of the macroscopic material can be captured. The damage criteria are based on the different modes of deformation in the pore walls, namely, elastic buckling, irreversible bending and brittle collapse under compression, and combined bending and stretching under tension. The proposed model approach serves as a reverse engineering tool to develop cellular solids with desired mechanical properties.

Item URL in elib:https://elib.dlr.de/141671/
Document Type:Article
Title:Influence of pore-size distributions and pore-wall mechanics on the mechanical behavior of cellular solids like aerogels
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Rege, Ameya GovindAmeya.Rege (at) dlr.dehttps://orcid.org/0000-0001-9564-5482
Aney, Shivangishivangi.aney (at) dlr.deUNSPECIFIED
Milow, BarbaraBarbara.Milow (at) dlr.dehttps://orcid.org/0000-0002-6350-7728
Date:2 April 2021
Journal or Publication Title:Physical Review E
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:103
DOI :10.1103/PhysRevE.103.043001
Page Range:043001
Publisher:American Physical Society
ISSN:2470-0045
Status:Published
Keywords:cellular materials, pore-size, pore-wall mechanics, bulk mechanical properties, aerogel, modeling
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:21 May 2021 07:34
Last Modified:24 May 2022 23:47

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