Prohlížení Časopisy dle autora "debd3ed8-680d-466a-a128-b86ac3ff1300"
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Comparison of FETI-based domain decomposition methods for topology optimization problems
Autor: Medřický, Tomáš; Doškář, Martin; Pultarová, Ivana; Zeman, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We critically assess the performance of several variants of dual and dual-primal domain decomposition strategies in problems with fixed subdomain partitioning and high heterogeneity in stiffness coefficients typically ... -
LOCALIZATION ANALYSIS OF DAMAGE FOR ONE-DIMENSIONAL PERIDYNAMIC MODEL
Autor: Mikeš, Karel; Jirásek, Milan; Zeman, Jan; Rokoš, Ondřej; Peerlings, Ron H. J.
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)Peridynamics is a recently developed extension of continuum mechanics, which replaces the traditional concept of stress by force interactions between material points at a finite distance. The peridynamic continuum is thus ... -
Microstructure reconstruction via artificial neural networks: a combination of causal and non-causal approach
Autor: Latka, Kryštof; Doškář, Martin; Zeman, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)We investigate the applicability of artificial neural networks (ANNs) in reconstructing a sample image of a sponge-like microstructure. We propose to reconstruct the image by predicting the phase of the current pixel based ... -
Newmark algorithm for dynamic analysis with Maxwell chain model
Autor: Schmidt , Jaroslav; Janda , Tomáš; Zemanová , Alena; Zeman , Jan; Šejnoha , Michal
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)This paper investigates a time-stepping procedure of the Newmark type for dynamic analyses of viscoelastic structures characterized by a generalized Maxwell model. We depart from a scheme developed for a three-parameter ... -
ON OPTIMUM DESIGN OF FRAME STRUCTURES
Autor: Tyburec, Marek; Zeman, Jan; Kružík, Martin; Henrion, Didier
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)Optimization of frame structures is formulated as a non-convex optimization problem, which is currently solved to local optimality. In this contribution, we investigate four optimization approaches: (i) general non-linear ... -
OPTIMIZATION-BASED APPROACH TO TILING OF FINITE AREAS WITH ARBITRARY SETS OF WANG TILES
Autor: Tyburec, Marek; Zeman, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Wang tiles proved to be a convenient tool for the design of aperiodic tilings in computer graphics and in materials engineering. While there are several algorithms for generation of finite-sized tilings, they exploit the ... -
SYNTHESIZED ENRICHMENT FUNCTIONS FOR EXTENDED FINITE ELEMENT ANALYSES WITH FULLY RESOLVED MICROSTRUCTURE
Autor: Doškář, Martin; Novák, Jan; Zeman, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Inspired by the first order numerical homogenization, we present a method for extracting continuous fluctuation fields from the Wang tile based compression of a material microstructure. The fluctuation fields are then used ... -
VARIATIONALLY-BASED EFFECTIVE DYNAMIC THICKNESS FOR LAMINATED GLASS BEAMS
Autor: Schmidt, Jaroslav; Zemanová, Alena; Janda, Tomáš; Zeman, Jan; Šejnoha, Michal
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)Laminated glass, consisting of glass layers connected with transparent foils, has found its applications in civil, automotive, or marine engineering. Due to a high contrast in layer properties, mechanical response of ...