| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Fleck, Norman A.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2020Growth rate of lithium filaments in ceramic electrolytes
- 2020Dendrites as climbing dislocations in ceramic electrolytes: Initiation of growth
- 2020The crack growth resistance of an elastoplastic lattice
- 2020An assessment of the J-integral test for a metallic foamcitations
- 2019The role of plastic strain gradients in the crack growth resistance of metalscitations
- 2019Tensile fracture of an adhesive jointcitations
- 2019The mechanics of solid-state nanofoamingcitations
- 2019Creep failure of honeycombs made by rapid prototypingcitations
- 2019The mechanics of solid-state nanofoaming.
- 2019Mechanical Properties of PMMA-Sepiolite Nanocellular Materials with a Bimodal Cellular Structurecitations
- 2018Compressive Behavior and Failure Mechanisms of Freestanding and Composite 3D Graphitic Foamscitations
- 2017Linking Scales in Plastic Deformation and Fracture
- 2016The tensile ductility of cellular solids: the role of imperfectionscitations
- 2015Hierarchical macroscopic fibrillar adhesives: in situ study of buckling and adhesion mechanisms on wavy substrates
- 2003Near net shape fabrication of highly porous parts by powder metallurgy
Places of action
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article
The mechanics of solid-state nanofoaming
Abstract
<p>Solid-state nanofoaming experiments are conducted on two polymethyl methacrylate (PMMA) grades of markedly different molecular weight using CO<sub>2</sub> as the blowing agent. The sensitivity of porosity to foaming time and foaming temperature is measured. Also, the microstructure of the PMMA nanofoams is characterized in terms of cell size and cell nucleation density. A one-dimensional numerical model is developed to predict the growth of spherical, gasfilled voids during the solid-state foaming process. Diffusion of CO<sub>2</sub> within the PMMA matrix is sufficiently rapid for the concentration of CO<sub>2</sub> to remain almost uniform spatially. The foaming model makes use of experimentally calibrated constitutive laws for the uniaxial stress versus strain response of the PMMA grades as a function of strain rate and temperature, and the effect of dissolved CO<sub>2</sub> is accounted for by a shift in the glass transition temperature of the PMMA. The maximum achievable porosity is interpreted in terms of cell wall tearing and comparisons are made between the predictions of the model and nanofoaming measurements; it is deduced that the failure strain of the cell walls is sensitive to cell wall thickness.</p>