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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 82
Kochová, Petra , Hympánová, Lucie , Rynkevic, Rita , Cimrman, Robert , Tonar, Zbyněk , Deprest, Jan , Kališ, Vladimír
The histological microstructure and in vitro mechanical properties of pregnant and postmenopausal ewe perineal body

Objective: The mechanical properties and microstructure of the perineal body are important for the improvement of numerical models of pelvic organs. We determined the mechanical parameters and volume fractions of the ewe perineal body as an animal model. Methods: The 39 specimens of...

Kottner, Radek , Bońkowski, Tomasz , Kaňáková, Sandra
Experimental Investigation of Foams Suitable for Motorcycle Protectors

Protectors of motorcycle riders should be light and safe. This work deals with the impact test of the shoulder protectors, which differ with the use of foams of different densities. The acceleration and displacement of an impactor having the mass of five kilograms were measure...

Bulín, Radek , Hajžman, Michal
Comparison of detailed belt-cylinder interaction model with classical belt friction formula

This paper deals with a comparison of the classical belt friction formula, also called Euler-Eytelwein equation, with a detailed belt-cylinder interaction model. The belt friction is a typical pedagogical problem where the usage of equilibrium conditions is shown, but also have a practi...

Turjanicová, Jana , Rohan, Eduard , Lukeš, Vladimír
Homogenization based two-scale modelling of ionic transport in fluid saturated deformable porous media

The paper deals with the homogenization and numerical modelling of deformable porous media saturated by two-component electrolytes. The model relevant to the microscopic scale describes steady states of the medium while reflecting essential physical phenomena, namely electrochemical interactions in a&...

Dupal, Jan , Zajíček, Martin , Lukeš, Vladimír
1D finite element for modelling of turbine blade vibration in the field of centrifugal forces

The paper deals with the modelling of turbine blade vibrations by means of a novel 1D finite element that has only 16 degrees of freedom. Assuming linear elastic behaviour of the blade material and considering small displacements and strains, the derived blade &#...

Lyu, Wenle , Hynčík, Luděk , Bońkowski, Tomasz
Rider Stature Influence to Injury Risk in Motorcycle Rear Impact to Car

Road traffic accidents cause one of the highest numbers of severe injuries. Approximately 1.25 million people die each year as a result of a road traffic crash and between 20 and 50 million more people suffer non-fatal injuries, with many incurring a disability. Nearly half&#x...

Hynčík, Luděk , Bońkowski, Tomasz , Lyu, Wenle
Development of a simple motorcyclist helmet finite element model

Motorcycle riders belong to the group of so-called vulnerable road users, for whom protection against an impact is an important issue due to the multi-directional loading and the complex kinematics after the impact. Virtual biomechanical human body models play an important role to ...

Šulc, Petr , Pešek, Luděk , Bula, Vítězslav , Košina, Jan , Cibulka, Jan
Torsion dissipated energy of hard rubbers as function of hyperelastic deformation energy of the Yeoh model

Verlinden, Olivier , Hajžman, Michal , Huynh, Hoai Nam , Byrtus, Miroslav
Multibody modelling of friction based interaction between turbine blades

Turbine blades are subjected to nozzle excitation frequencies that can correspond to eigen frequencies during acceleration and deceleration phases so that it is necessary to introduce some form of damping to avoid fatigue and mechanical damage of the blade material. Friction based solut...

Smolík, Luboš , Rendl, Jan , Dyk, Štěpán , Polach, Pavel , Hajžman, Michal
Threshold stability curves for a nonlinear rotor-bearing system

Design parameters of fluid film bearings affect the stability of rotor-bearing systems, which can be characterized using so called threshold speed and a threshold curve (depending on a shaft speed and a chosen design parameter). The paper brings a detailed study of the shape o...

Zeman, Vladimír , Hlaváč, Zdeněk
Modelling of the friction-vibration interactions in reactor core barrel couplings

Krejčová, Milada , Holeček, Miroslav
Influence of boundary conditions on stochastic movement of biological molecular motors

Kaňáková, Sandra , Kottner, Radek
Identification of material properties of foam used in motorcyclist protective equipment based on obtained experimental data and optimization algorithm

Turjanicová, Jana , Rohan, Eduard
Numerical simulation of quasi-static model of ionic transport through deformable porous media

The paper deals with the computational model of quasi-static transport of 2-component electrolyte solution transport trough deformable porous medium respecting material microstructure. The multiscale approach is used to derive effective tensors describing macroscopic homogenized body. Numerical simulation are&#...

Smolík, Luboš
Post-processing techniques for response of non-linear systems

Challenges in modern engineering require implementation of more and more complex computational models. The computational models are often non-linear and even a slight modification of a design parameter can cause qualitative changes in a predicted response. Several visualisation methods which impr...

Rendl, Jan , Zilli, Leonardo , Sedláček, František
Investigation of driving properties for formula Student

This paper deals with the investigation of driving properties such as rolling resistance of the chassis during the cornering and the effect of anti-roll bars on this phenomenon. This variable has a significant influence on the change of loading forces at tire contact patches, ...

Polach, Pavel , Hajžman, Michal , Bulín, Radek
Selected problems solved in Pilsen using multibody dynamics

The paper informs on some problems solved during approximately past twenty years in Pilsen using multibody simulations. Naturally, the list of activities is not comprehensive, it concerns activities of the authors in Výzkumný a zkušební ústav Plzeň s.r.o. and in the Department of M...

Krejčová, Milada , Holeček, Miroslav , Chełminiak, Przemysław
The measurement of single myosin head in Fokker-Planck framework and information gain

Muscles on a molecular level are created by actin and myosin filaments. In this scale, it is necessary to take into an account thermal fluctuations – describe in terms of Brownian motion. Due to the motion, it is impossible to predict exact position of a single myosi...

Kocáb, Jiří , Kottner, Radek , Heczko, Jan , Krystek, Jan
Shear and torsion tests of viscoelastic materials

The main scope of the paper are shear and torsion tests of cork-composite Amorim ACM87. The material is a particle composite with viscoelastic properties. In order to investigate the behaviour of viscoelastic materials, performance of specific mechanical experiments is important. Some materi...

Hajžman, Michal
Dynamics of rotating systems with rolling element bearings

This paper deals with a suitable approach to the computational modelling of rolling element bearings in the framework of rotating systems dynamics. Various alternative approaches are briefly summarized and a chosen moderately complex approach is described in more detail. The presented bearin...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 82