Abdusalamov, Rasul and Itskov, Mikhail and Milow, Barbara and Rege, Ameya Govind (2021) Analysis of the fractal properties of silica aerogels using diffusion-limited aggregation. Proceedings in Applied Mathematics and Mechanics, 20 (1), e202000099. Wiley. doi: 10.1002/pamm.202000099. ISSN 1617-7061.
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Official URL: https://onlinelibrary.wiley.com/doi/10.1002/pamm.202000099
Abstract
Silica aerogels are highly porous solids with very low densities and thermal conductivities. Their high porosity results in a fractal morphology which has a strong influence on mechanical properties. In this work, the diffusion-limited cluster aggregation (DLCA) method is implemented to model silica aerogel aggregates. A preliminary model based on this approach demonstrates good agreement with experimental data [1]. The influence on the fractal properties of different input parameters as for example the particle size is investigated. Moreover, the resulting geometries are compared to fractal features of silica aerogels determined by experimental data from small angle X-ray scattering (SAXS). The mechanical response of these aggregation models is analyzed by a finite element analysis (FEA) for the generated representative volume elements (RVE). The effect of varying densities on the mechanical properties, for e.g., Young's modulus, is further elucidated.
Item URL in elib: | https://elib.dlr.de/140637/ | |||||||||||||||
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Document Type: | Article | |||||||||||||||
Title: | Analysis of the fractal properties of silica aerogels using diffusion-limited aggregation | |||||||||||||||
Authors: |
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Date: | 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: | 20 | |||||||||||||||
DOI : | 10.1002/pamm.202000099 | |||||||||||||||
Page Range: | e202000099 | |||||||||||||||
Publisher: | Wiley | |||||||||||||||
ISSN: | 1617-7061 | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | silica aerogel, DLCA, fractal, mechanical | |||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | |||||||||||||||
HGF - Program: | Aeronautics | |||||||||||||||
HGF - Program Themes: | fixed-wing aircraft | |||||||||||||||
DLR - Research area: | Aeronautics | |||||||||||||||
DLR - Program: | L AR - Aircraft Research | |||||||||||||||
DLR - Research theme (Project): | L - Systems and Cabin (old) | |||||||||||||||
Location: | Köln-Porz | |||||||||||||||
Institutes and Institutions: | Institute of Materials Research > Aerogels and Aerogel Composites | |||||||||||||||
Deposited By: | Rege, Dr. Ameya Govind | |||||||||||||||
Deposited On: | 01 Feb 2021 12:48 | |||||||||||||||
Last Modified: | 01 Feb 2021 12:48 |
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