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7 papers · 2 filters
Solid-to-solid phase transition from amorphous carbon to graphite nanocrystal induced by intense femtosecond x-ray pulses
J. Gaudin, J. Chalupský, M. Toufarová +22
We present the results of an experiment where amorphous carbon was irradiated by femtosecond x-ray free electron laser pulses. The 830 eV laser pulses induce a phase transition in…
Microstructural enrichment functions based on stochastic Wang tilings
J. Novák, A. Kučerová, J. Zeman
This paper presents an approach to constructing microstructural enrichment functions to local fields in non-periodic heterogeneous materials with applications in Partition of Unity…
An FET-Based Unit Cell for an Active Magnetic Metamaterial
Lukas Jelinek, Jan Machac
A particle that can be used to create an active magnetic metamaterial has been designed using an FET transistor loaded in its gate by a conducting ring and in its source by a paral…
Diffusion of Mn interstitials in (Ga,Mn)As epitaxial layers
L. Horák, J. Matějová, X. Martí +5
Magnetic properties of thin (Ga,Mn)As layers improve during annealing by out-diffusion of interstitial Mn ions to a free surface. Out-diffused Mn atoms participate in the growth of…
A micromechanics-enhanced finite element formulation for modelling heterogeneous materials
J. Novák, Ł. Kaczmarczyk, P. Grassl +2
In the analysis of composite materials with heterogeneous microstructures, full resolution of the heterogeneities using classical numerical approaches can be computationally prohib…
Localization analysis of variationally based gradient plasticity model
Milan Jirásek, Ondřej Rokoš, Jan Zeman
The paper presents analytical or semi-analytical solutions for the formation and evolution of localized plastic zone in a uniaxially loaded bar with variable cross-sectional area.…