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Morphological implications on the mechanics of porous materials

Rege, Ameya (2023) Morphological implications on the mechanics of porous materials. GAMM Jahrestagung, 2023-05-30 - 2023-06-02, Dresden, Deutschland.

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Official URL: https://jahrestagung.gamm.org/annual-meeting-2023/93rd-annual-meeting/

Abstract

The mechanical properties of open-porous cellular materials are guided by their pore-network connectivity and their pore-wall morphologies. In this contribution, both these aspects will be discussed. First, the effect of the pore-network connectivity will be addressed. Here, the scaling exponent as observed in the power scaling relations between e.g., Young’s modulus and the relative density will be explored. While the open-cell foam model calculates the exponent to be 2 [1], many porous materials demonstrate an exponent between 3 and 4 [2]. The morphological implications towards this observation will be illustrated through computational modeling and finite element calculations. Moreover, many open-porous materials show a pearl-necklace-like pore-wall morphology [3]. There, the inter-particle necks play a significant role in determining the mechanical features of such materials, particularly their mode of deformation and failure [4]. This aspect will also be explored in detail. [1] L.J. Gibson, M.F. Ashby, The mechanics of three-dimensional cellular materials, Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 382 (1997) 43-59. [2] J. Groß, J. Fricke, Scaling of elastic properties in highly porous nanostructured aerogels, NanoStructured Materials, 6 (1995) 905-908. [3] A. Rege, S. Aney, L. Ratke, Impact of pearl-necklace-like skeleton on pore sizes and mechanical properties of porous materials: A theoretical view, AIP Advances, 12 (2022) 105108. [4] L. Ratke, A. Rege, S. Aney, The Effect of Particle Necks on the Mechanical Properties of Aerogels, Materials, 16 (2022).

Item URL in elib:https://elib.dlr.de/197863/
Document Type:Conference or Workshop Item (Speech)
Title:Morphological implications on the mechanics of porous materials
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Rege, AmeyaUNSPECIFIEDhttps://orcid.org/0000-0001-9564-5482UNSPECIFIED
Date:2023
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:aerogel, porous, material, morphology, modelling
Event Title:GAMM Jahrestagung
Event Location:Dresden, Deutschland
Event Type:international Conference
Event Start Date:30 May 2023
Event End Date:2 June 2023
Organizer:GAMM
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 - FFAE - Fahrzeugkonzepte, Fahrzeugstruktur, Antriebsstrang und Energiemanagement
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Aerogels and Aerogel Composites
Deposited By: Rege, Dr. Ameya Govind
Deposited On:19 Oct 2023 10:22
Last Modified:24 Apr 2024 20:58

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