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Thermal and Mechanical Properties of Porous Cellular Materials and Their Composites

A special issue of Materials (ISSN 1996-1944).

Deadline for manuscript submissions: closed (30 September 2019) | Viewed by 7067

Special Issue Editors


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Guest Editor
LaMCoS, INSA-Lyon, UMR CNRS 5259, 18-20, rue des Sciences, CEDEX, 69621 Villeurbanne, France
Interests: heterogeneous media; porous media; cellular materials; foam; modeling; thermal properties; mechanical properties
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Industrial Engineering, Università degli studi di Napoli Federico II, Piazzale Tecchio 80, 80125 Naples, Italy
Interests: heat transfer; nearly and net zero energy buildings; building envelope; HVAC systems and equipment; renewable energy sources at the building scale; fire safety
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Materials with cellular structure widely occur in nature. We can cite as examples bone, coral, cork, wood, plant stems. Inspired by them, manufactured porous cellular media and their composites have seen strong development these last few years. Among them, honeycomb, foams, opacified foams or hybrid materials containing cellular materials present, not only thermal, lightness, but also mechanical properties, which make them very interesting for numerous applications.

Advances have been achieved these last few years, in parallel in various scientific communities, those of materials, heat and mass transfer and mechanics. Research has been focusing on the characterization of thermal and mechanical effective properties of such porous materials, via analytical, numerical and experimental methods. Because of the complex architecture of cellular materials, it is difficult to predict their properties using analytical calculations without important simplifications to the architecture. Analytical methods require often simplified architecture of foam (such as cubic cells) while numerical approaches model the physical mechanisms in a representative elementary volume using discretized pore-scale model of the foam (obtained from X-ray tomography, Voronoi tessellation method, etc.). Recent advances on analytical, computational and experimental method permit to better understand the properties of these materials.

It is our pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Dominique Baillis
Prof. Nicola Bianco
Guest Editors

Manuscript Submission Information

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Keywords

  • Computational Modeling
  • Materials Science
  • Cellular Materials
  • Porous media
  • Thermal Properties
  • Mechanical Properties
  • Transport properties

Published Papers (2 papers)

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Research

14 pages, 8141 KiB  
Article
Bi-Material Negative Thermal Expansion Inverted Trapezoid Lattice based on A Composite Rod
by Weipeng Luo, Shuai Xue, Meng Zhang, Cun Zhao and Guoxi Li
Materials 2019, 12(20), 3379; https://doi.org/10.3390/ma12203379 - 16 Oct 2019
Cited by 12 | Viewed by 2866
Abstract
Negative thermal expansion (NTE) lattices are widely used in aerospace engineering where the structures experience large temperature variation. However, the available range of NTE of the current lattices is quite narrow, which severely limits their engineering application. In this paper, we report an [...] Read more.
Negative thermal expansion (NTE) lattices are widely used in aerospace engineering where the structures experience large temperature variation. However, the available range of NTE of the current lattices is quite narrow, which severely limits their engineering application. In this paper, we report an inverted trapezoid lattice (ITL) with large NTE. The NTE of the ITL is 2.6 times that of a typical triangular lattice with the same height and hypotenuse angle. Theoretically, with a pin-jointed assumption, the ITL can improve the NTE by order of magnitude if the length ratio of the composite rod is changed. In the presented ITL, a composite rod is utilized as the base of the ITL. The composite rod has large inner NTE. The inverted trapezoid structure converts the inner NTE to the vertical direction contraction and obtains an extra NTE. Finite element simulations and experimental verification by interferometric measurement were conducted to verify the large thermal expansion of the ITL. Full article
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19 pages, 5741 KiB  
Article
Effective Elastic Behavior of Irregular Closed-Cell Foams
by Wenqi Zhu, Nawfal Blal, Salvatore Cunsolo, Dominique Baillis and Paul-Marie Michaud
Materials 2018, 11(11), 2100; https://doi.org/10.3390/ma11112100 - 25 Oct 2018
Cited by 9 | Viewed by 3676
Abstract
This paper focuses on the computational modeling of the effective elastic properties of irregular closed-cell foams. The recent Hill’s lemma periodic computational homogenization approach is used to predict the effective elastic properties. Three-dimensional (3D) rendering is reconstructed with the tomography slices of the [...] Read more.
This paper focuses on the computational modeling of the effective elastic properties of irregular closed-cell foams. The recent Hill’s lemma periodic computational homogenization approach is used to predict the effective elastic properties. Three-dimensional (3D) rendering is reconstructed with the tomography slices of the real irregular closed-cell foam. Its morphological description is analysed to generate realistic numerical closed-cell structures by the Voronoi-based approach. The influences of the Representative Volume Element (RVE) parameters (i.e., the number of realizations and the volume of RVE) and the relative density on the effective elastic properties are studied. Special emphasis is placed on the appropriate choice of boundary conditions. Satisfying agreements between the homogenized results and the experimental results are observed. Full article
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