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Microstructure-informed modeling of open-porous cellular materials

Aney, Shivangi and Milow, Barbara and Rege, Ameya (2022) Microstructure-informed modeling of open-porous cellular materials. ECCOMAS Congress 2022, 2022-06-05 - 2022-06-09, Oslo, Norwegen.

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There have been several computational studies investigating the influence of the relative density on the macroscopic mechanical properties of open-porous cellular materials [1, 2]. However, the influence of the pore-sizes on the bulk properties of the material is still unclear for materials that exhibit a wide range of pore sizes over the length scale. The relevance of the pore structure on the properties of such materials was investigated by proposing a constitutive model and was recently reported [3]. In this work, we investigate computationally the influence of three morphological parameters viz., the relative density, the pore-size distribution, and the pore-wall thickness on the mechanical properties of such open-porous materials. The results obtained emphasize that the effects of the pore-sizes, distributions and pore-wall thickness are not negligible although the relative density plays a significant role in dictating their mechanical properties. This is particularly true for materials showing a poly-disperse porous structure. As an example, the computational reconstruction of the three-dimensional (3-d) porous network of cellulose aerogels is described and the macroscopic material properties are validated against the experimental data. REFERENCES [1] Gibson, L. J., Ashby, M. F., Schajer, G. S., & Robertson, C. I. (1982). The mechanics of two-dimensional cellular materials. Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences 382, 25-42. [2] Gibson, I. J., & Ashby, M. F. (1982). The mechanics of three-dimensional cellular materials. Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences 382, 43-59. [3] Rege, A., Aney, S., & Milow, B. (2021). Influence of pore-size distributions and pore-wall mechanics on the mechanical behavior of cellular solids like aerogels. Physical Review E 103, 043001.

Item URL in elib:https://elib.dlr.de/193721/
Document Type:Conference or Workshop Item (Speech)
Title:Microstructure-informed modeling of open-porous cellular materials
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Milow, BarbaraUNSPECIFIEDhttps://orcid.org/0000-0002-6350-7728UNSPECIFIED
Rege, AmeyaUNSPECIFIEDhttps://orcid.org/0000-0001-9564-5482UNSPECIFIED
Date:8 June 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Porous cellular materials, Pore-size distributions, Pore-wall thickness, Relative Density, Macroscopic material properties, Computational Reconstruction.
Event Title:ECCOMAS Congress 2022
Event Location:Oslo, Norwegen
Event Type:international Conference
Event Start Date:5 June 2022
Event End Date:9 June 2022
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:01 Feb 2023 08:41
Last Modified:24 Apr 2024 20:54

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