Ústav mechaniky těles, mechatroniky a biomechaniky
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Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes
(MDPI, 2020-11-24)Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and ... -
Crack Protective Layered Architecture of Lead-Free Piezoelectric Energy Harvester in Bistable Configuration
(MDPI, 2020-10-14)Kinetic piezoelectric energy harvesters are used to power up ultra-low power devices without batteries as an alternative and eco-friendly source of energy. This paper deals with a novel design of a lead-free multilayer ... -
Efficiency of Plasticity Correction in the Hole-Drilling Residual Stress Measurement
(MDPI, 2020-07-31)This paper focuses on the analysis of the plasticity effect in the measurement of the residual stress by the hole-drilling method. Relaxed strains were evaluated by the computational simulation of the hole-drilling experiment ... -
Influence of Threshold Values on Residual Fatigue Lifetime of Railway Axles under Variable Amplitude Loading
(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
(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
(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 ... -
Critical applied stresses for a crack initiation from a sharp V-notch
(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 ... -
A fractographic study of bending/torsion fatigue failure in metallic materials with protective surface layers
(Hindawi, 2016-06-10)Results are given of a fractographic study of biaxial in-phase bending/torsion fatigue fractures in specimens made of nitrided steel and nickel-based superalloy with protective coatings (diffusion coatings and plasma-sprayed ... -
Selection of MEMS Accelerometers for Tilt Measurements
(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
(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
(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 ... -
Microcrack interaction with circular inclusion and interfacial zone
(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 ... -
Finite element analysis of 6 large PMMA skull reconstructions: A multi-criteria evaluation approach
(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 ... -
The Effect of the Free Surface on the Singular Stress Field at the Fatigue Crack Front
(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
(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
(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
(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
(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
(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 ...
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