• Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading 

  Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (Elsevier, 2015-03-20)

  The paper deals with an estimation of residual fatigue lifetime of railway axles under real loading spectrum. The residual fatigue lifetime is given by magnitude of fatigue crack propagation rate. This rate depends ...

• Comparison of Different Load Spectra on Residual Fatigue Lifetime of Railway Axle 

  Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (Elsevier, 2014-06-18)

  The railway axles are subjected to variable amplitude loading. The variability is caused by many different regimes of train operation. The dominant load is caused by the weight of the vehicle, which generates rotary bending ...

• Impact of Decreased Transmural Conduction Velocity on the Function of the Human Left Ventricle: A Simulation Study 

  Vaverka, Jiří; Moudr, Jiří; Lokaj, Petr; Burša, Jiří; Pásek, Michal (Hindawi, 2020-04-04)

  This study investigates the impact of reduced transmural conduction velocity (TCV) on output parameters of the human heart. In a healthy heart, the TCV contributes to synchronization of the onset of contraction in individual ...

• Effect of Transmural Differences in Excitation-Contraction Delay and Contraction Velocity on Left Ventricle Isovolumic Contraction: A Simulation Study 

  Vaverka, Jiří; Burša, Jiří; Šumbera, Josef; Pásek, Michal (Hindawi, 2018-05-10)

• Critical applied stresses for a crack initiation from a sharp V-notch 

  Náhlík, Luboš; Hutař, Pavel; Štegnerová, Kateřina (Gruppo Italiano Frattura, 2014-10-31)

  The aim of the paper is to estimate a value of the critical applied stress for a crack initiation from a sharp V-notch tip. The classical approach of the linear elastic fracture mechanics (LELM) was generalized, because ...

• Selection of MEMS Accelerometers for Tilt Measurements 

  Grepl, Robert (Hindawi, 2017-03-30)

  In order to build a tilt sensor having a desired sensitivity and measuring range, one should select an appropriate type, orientation, and initial position of an accelerometer. Practical guidelines for an optimal selection ...

• Computational Modelling of the Unbalanced Magnetic Pull by Finite Element Method 

  Donát, Martin (Elsevier, 2012-11-05)

  This paper presents a process of calculating of the unbalanced magnetic pull in the rotating electrical machines based on the electromagnetic coupled field analysis. The computational model is ...

• Influencing the Indentation Curves by the Bluntness of the Berkovich Indenter at the Fem Modelling 

  Kovář, Jaroslav; Fuis, Vladimír; Tomáštík, Jan (Acta polytechnica CTU proceedings, 2020-06-01)

  The influence of the Berkovich indenter bluntness on the indentation curves at nanoindentation test of fused silica is determined by the FEM (finite element method) in this paper. The Berkovich indenter, which is mostly ...

• Finite element analysis of 6 large PMMA skull reconstructions: A multi-criteria evaluation approach 

  Ridwan-Pramana, Angela; Marcián, Petr; Borák, Libor; Narra, Nathaniel; Forouzanfar, Tim; Wolff, Jan (PLOS, 2017-06-13)

  In this study 6 pre-operative designs for PMMA based reconstructions of cranial defects were evaluated for their mechanical robustness using finite element modeling. Clinical experience and engineering principles were ...

• Microcrack interaction with circular inclusion and interfacial zone 

  Profant, Tomáš; Hrstka, Miroslav; Klusák, Jan (Gruppo Italiano Frattura, 2019-01-04)

  A geometrically simplified plane elasticity problem of a finitesmall crack emanating from a thin interfacial zone surrounding the circularinclusion situated in the finite bounded domain is investigated. The crack isarbitrarily ...

• The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front 

  Oplt, Tomáš; Pokorný, Pavel; Náhlík, Luboš; Hutař, Pavel (De Gruyter Open, 2017-11-22)

  Description of stress singularity in the vicinity of a free surface is presented. Its presence causes the retardation of the fatigue crack growth in that region and fatigue crack is being curved. Numerical model is used ...

• Understanding the edge crack phenomenon in ceramic laminates 

  Ševeček, Oldřich; Kotoul, Michal; Leguillon, Dominique; Martin, Éric; Bermejo, Raul (Gruppo Italiano Frattura, 2015-10-05)

  In this work, a 2D parametric finite element model has been developed to predict the onset and propagation of an edge crack in ceramic laminates using a coupled stress-energy criterion. This approach states that a crack ...

• Estimation of stepwise crack propagation in ceramic laminates with strong interfaces 

  Náhlík, Luboš; Štegnerová, Kateřina; Hutař, Pavel (Gruppo Italiano Frattura, 2015-10-01)

  The contribution deals with a description of the specific crack behaviour in the layered alumina-zirconia ceramic laminate. The main aim is to clarify crack behaviour in the compressive layer and provide computational tools ...

• Influence of the cell geometry on the tensile strength of open-cell ceramic foams 

  Ševeček, Oldřich; Papšík, Roman; Majer, Zdeněk; Kotoul, Michal (Elsevier, 2020-02-19)

  Nowadays used open cell foam ceramic materials are mostly of irregular structure which means that the shape of particular foam cells does not exhibit any regular pattern. On one hand, such foam structures lead to only very ...

• Comparison of the Resistance to Bending Forces of the 4.5 LCP Plate-rod Construct and of 4.5 LCP Alone Applied to Segmental Femoral Defects in Miniature Pigs 

  Urbanová, Lucie; Srnec, Robert; Proks, Pavel; Stehlík, Ladislav; Florian, Zdeněk; Návrat, Tomáš; Nečas, Alois (University of Veterinary and Pharmaceutical Sciences in Brno, 2010-12-20)

  The study deals with the determination of mechanical properties, namely resistance to bending forces, of flexible buttress osteosynthesis using two different bone-implant constructs stabilizing experimental segmental femoral ...

• Biomechanical Evaluation of the MACSTL Internal Fixator for Thoracic Spinal Stabilisation 

  Veselý, Radek; Florian, Zdeněk; Wendsche, Peter; Tošovský, Jiří (University of Veterinary and Pharmaceutical Sciences in Brno, 2008-03-15)

  Unstable fractures of the thoracic spine in humans represent a serious social and economic issue. They may lead to persistent consequences and chronic disease. The anatomical and biomechanical characteristics of the thoracic ...

• Design of pressure sensor based on optical fiber Bragg grating lateral deformation 

  Urban, František; Kadlec, Jaroslav; Vlach, Radek; Kuchta, Radek (MDPI, 2010-12-08)

  This paper describes steps involved in the design and realization of a new type of pressure sensor based on the optical fiber Bragg grating. A traditional pressure sensor has very limited usage in heavy industrial environments, ...

• Experimental and Computational Evaluation of Rolling Bearing Steel Durability 

  Nohál, Libor; Vaculka, Miroslav (Tanger Ltd., 2016-11-09)

  Rolling element bearings are widely-used machine components and their failure can result in damage to the whole machine. A bearing failure can be caused by many factors. In most cases it is damage on the raceway surface ...

• Case study of multiaxial criteria for rolling contact fatigue of bearing steels 

  Vaculka, Miroslav; Nohál, Libor; Vosynek, Petr (EDP Sciences, 2018-05-25)

  A rolling contact fatigue (RCF) differs from the classic fatigue in a stress-state. Nowadays, a prediction of the RCF is still not on the sufficient level. A lot of researchers tried to apply different multiaxial fatigue ...

• Fracture mechanics parameters of multilayer pipes 

  Malíková, Lucie; Náhlík, Luboš; Hutař, Pavel; Knésl, Zdeněk (University of West Bohemia, 2007-10-19)

  Multilayer pipes consisting of different materials are frequently used in praxis because of partial improvement of the properties of pipe systems. To estimate lifetime of these pipes the basic fracture parameters have to ...

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