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APPLICATION OF THE MORI-TANAKA METHOD TO DESCRIBE THE RATE-DEPENDENT BEHAVIOR OF UNIDIRECTIONAL FIBROUS COMPOSITES
Autor: Valentová, Soňa; Šejnoha, Michal; Vorel, Jan; Sedláček, Radek; Padevět, Pavel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)This paper examines the possibility of using the Mori-Tanaka micromechanical model describe the rate dependent behavior of the polymer matrix based fibrous composites. The generalized Leonov model is adopted to capture the ... -
COMPARING MORI-TANAKA METHOD AND FIRST-ORDER HOMOGENIZATION SCHEME IN THE VISCOELASTIC MODELING OF UNIDIRECTIONAL FIBROUS COMPOSITES
Autor: Valentová, Soňa; Šejnoha, Michal; Vorel, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2020)A comparative study of the viscous response of polymer matrix based fibrous composites predicted by the Mori-Tanaka method and finite element simulations based on the 1st order homogenization theory is presented. Aligned ... -
DETERMINATION OF HYGROEXPANSION COEFFICIENTS OF WOOD USING ANALYTICAL AND NUMERICAL HOMOGENIZATION
Autor: Kucíková, Lucie; Šejnoha, Michal; Vorel, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)This paper is concerned with the determination of hygroexpansion coefficients of wood. Wood is a naturally hygroscopic material, attracting moisture from its surroundings. Its dimensions change depending on the actual ... -
Generation of LDPM structure formed by Voronoi cells
Autor: Vozáb, Jan; Vorel, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)A preliminary study of an approach to internal structure generation used in lattice discrete particle models (LDPMs) [1]. The presented method used for particle generation and placement is intended to help realistically ... -
Generation of mesostructure for lattice discrete particle model
Autor: Vozáb, Jan; Vorel, Jan; Marcon, Marco; Podroužek, Jan; Wan-Wendner, Roman
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A preliminary study of two approaches for the internal structure generation utilized in the lattice discrete particle models (LDPM) [1] is presented. The presented methods used for particle generation and placement are ... -
Influence of microstructure on rate-dependent response of unidirectional fibrous composites
Autor: Valentová, Soňa; Šejnoha, Michal; Vorel, Jan; Prošek, Zdeněk
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper outlines prediction of the macroscopic response of unidirectional fibrous composites made either from basalt or carbon fibers impregnated by a polymeric epoxy matrix. The viscoelastic response of the matrix phase ... -
MODELLING OF TIME-DEPENDENT BEHAVIOUR OF PARTICULATE THERMOSET POLYMERS
Autor: Vozáb, Jan; Vorel, Jan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2021)A preliminary study of a numerical model describing the behaviour of polymer-based composites is presented. The numerical model consists of three main parts. The first is the microplane M4 model, which is the main part of ... -
STRENGTH OF COMPOSITE YARN UNDER BIAXIAL LOADING
Autor: Valentová, Soňa; Hrbek, Vladimír; Vorel, Jan; Šejnoha, Michal
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)The present paper is concerned with two types of periodic unit cell of composite yarn with different geometry but the same material properties. Their macroscopic response under tensile and compressive loading in the ... -
USING HOMOGENIZATION AND NANOINDENTATION FOR MICROFIBRIL ANGLE DETERMINATION OF SPRUCE
Autor: Kucíková, Lucie; Hrbek, Vladimír; Vorel, Jan; Šejnoha, Michal
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)This paper is concerned with the evaluation of microfibril angle of spruce. The microfibril angle is defined as an inclination of microfibrils from the longitudinal axis, the direction of lumens. It is well known and further ...