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Poster

Active meta-materials with adjustable pore size

Wednesday (24.10.2018)
19:42 - 19:45
Part of:
Line-Up:
- Poster Battery housings for electric vehicles using CFRP and aluminium foam 0 Joachim Baumeister
- Poster Manufacturing and characterization of open-cell stainless steel foams by investment casting 1 Jan Frömert
- Poster Interface formation of Mg2X (X = Si, Sn) in cellular Si infiltrated by Mg(Sn) alloys 1 Alexander M. Matz
- Poster Production of microcellular PMMA using the bead foaming technology 1 Mikel Mugica
- Poster Nanocellular PMMA with tunable cellular structure by changing the rheological behaviour of the polymer matrix. 1 Judith Martín de León
- Poster Production of thermoplastic polyurethane foams synthesized with different contents of hard segment and graphene nanoplatelets by the gas dissolution foaming process 1 Ph.D. Mercedes Santiago-Calvo
- Poster Surface functionalized filters for aluminum melt filtration 1 Dr.-Ing. Claudia Voigt
- Poster Nanocellular polymers based on PMMA/sepiolite nanocomposites: characterization of the mechanical behaviour 1 Victoria Bernardo
- Poster Impact resistant foams based on PP/POE blends 1 Ph.D. Santiago Munoz Pascual
- Poster Crosslinked open cell ethylene butyl acrylate copolymer (EBA) foams: properties and applications 1 Ph.D. Eduardo López
- Poster Influence of molecular weight in the solubility,diffusivity and the subsequent cellular structure of polystyrene foams 1 Ph.D. Alberto Ballesteros
- Poster Crushing strength measurement at reticulated ceramic foams ex situ and in situ CT analysis 1 Dr.-Ing. Claudia Voigt
- Poster Initiation of plateau region during compression test of porous metals with aligned unidirectional pores 1 Tomoya Tamai
- Poster Active meta-materials with adjustable pore size 1 Dr. Reza Hedayati
- Poster Polymeric foams 3D numerical mechanical modelling 1 Stefano Tagliabue
- Poster Characterisation of NiTi cellular materials fabricated by the powder-metallurgy spaceholder technique 1 Dr. Karl Dahm
- Poster Accurate separation of open cell metal foams using remote laser cutting technique 1 Robert Baumann
- Poster Generation of artificial foam structures and evaluation of their thermo-mechanical, flow and filtration characteristics (Poster) 1 Christoph Settgast
- Poster Surface modification of magnesium-based foams by Directed Plasma Nanosynthesis 1 Viviana Marcela Posada Pérez

General Topic P: Postersession
Belongs to:


Metamaterials are manmade materials which are designed to address a problem by engineering the micro-features. The characteristics of metamaterials are dominated by their newly designed microstructures as compared to the base material. Metamaterials are usually made of repeating unit cells with dimensions smaller than the wavelength of the phenomenon they are designed to interact with. Several topological parameters determine how a permeable metamaterial behaves in different environments. Those topological parameters include the unit cell shape, the pore size, the ligament cross-section shape, and the base material. Among the four main noted characteristics, the pore size is the most important parameter in determining the noise reduction. Pore size is also the main parameter that determines the mechanical, heat transfer, optical, or fluid flow characteristics of permeable metamaterials.


In this research, smart permeable materials, which can sense and interact with their environment has been developed. The predecessors of these permeable metamaterials are open-cell foams, which have been used for decades to interact with fluid flow (i.e. in filters, heat exchangers, radiation shielding, and thermo-acoustics). The problem is that the medium the foams deals with is not always constant and in many cases it varies spatially and temporally. Some recent studies have tried to use additive manufacturing (AM) to optimize topology distribution throughout the structure. Even though the topology optimized permeable metamaterials have several advantages over uniform foams, they still lack the ability of dynamic change in their temporal and local properties which can further increase their functionality for different applications. In this research, innovative active meta-materials have been designed and fabricated which can be used under a multitude of applications. These hybrid metamaterials are composed of an additively manufactured passive skeleton over which an active coating is applied. The active coating changes shape with the help of a pneumatic control mechanism.


Smart permeable porous metamaterials have many potential applications that will contribute to more sustainable and healthier society. The applications include: aero-acoustics (AE), wind-energy, filters (ChemE), crashworthiness and impact damping, vibration damping, and biomedical implants.

 

Speaker:
Dr. Reza Hedayati
Delft University of Technology
Additional Authors:
  • Prof. Dr. Sybrand van der Zwaag
    Delft University of Technology