Ústav mechaniky těles, mechatroniky a biomechaniky
Browse by
Recent Submissions
-
Cyclic behaviour and microstructural evolution of metastable austenitic stainless steel 304L produced by laser powder bed fusion
(Elsevier, 2023-04-25)It has been documented that the hierarchical character of microstructure produced by laser powder bed fusion (L-PBF) is the key to superior mechanical properties. Especially important is a fine cell microstructure possessing ... -
Prediction of edge and tunnelling crack formation in layered ceramics using a stress-energy fracture criterion
(ELSEVIER SCI LTD, 2023-07-01)A coupled stress-energy criterion is utilized to predict initiation of both edge and tunnelling cracks in layered ceramics containing thermal residual stresses. Edge (surface) cracks may originate in layers having high ... -
Experimental validation of the operation of tilting-pad journal bearing lubricated by high-test peroxide under excessive vibrations and reduced flow of the lubricant
(Elsevier, 2023-03-22)Hydrogen peroxide is commonly used as a low-toxicity liquid rocket propellant (oxidizer). Hydrodynamic bearings lubricated by this propellant may be applicable in rocket engine pumps. In this paper, a hydrodynamic tilting-pad ... -
Prediction of the fatigue life of notched specimens: The influence of the surface quality produced by machining
(Elsevier, 2023-01-13)The article introduces a method for fatigue lifetime predictions of notched specimens. The method uses fracture stresses of smooth and notched specimens with notch radius r=0.2 mm. These two sets of experimental data are ... -
Fatigue behavior of DIN 1.4307 and DIN 1.4306 stainless steels under high frequency loading
(Elsevier, 2023-01-13)Two stainless steels DIN 1.4307 and DIN 1.4306 were tested by an ultrasonic fatigue loading device under push-pull mode (stress ratio R=-1). Life-time curves were determined in the high and very high cycle fatigue regions. ... -
Sensitivity of numerically modelled crack closure to material
(Elsevier, 2023-01-03)Crack closure is a phenomenon which slows down fatigue crack propagation and leads to higher residual life of components and to a change in the crack front curvature. Because of the significant impact on the fatigue crack ... -
Linear woodcutting of European beech: experiments and computations
(Springer Nature, 2023-01-13)Hardwood species are becoming increasingly important with the growing need for a diversity of forests that have recently been facing global temperature changes or conifer pests. This further leads to the growth of its ... -
Additive manufacturing capabilities for heat switch technology: Key challenges & knowledge gaps
(EUCASS association, 2022-09-28)The paper is to provide an overview of the key challenges and knowledge gaps in additive manufacturing of metals applied to two parts of a novel heat switch technology – a Baseplate and a Flexible thermal structure. Additive ... -
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 ... -
Universal Procedure for Correction of Plasticity Effect in HoleDrilling Uniform Residual Stress Measurement
(Springer, 2022-08-15)Background The hole-drilling method is a well-known and widely used technique for the determination of residual stresses, but is limited to materials with linear elastic behaviour. This can be a problem when high residual ... -
Control of Magnetic Manipulator Using Reinforcement Learning Based on Incrementally Adapted Local Linear Models
(WILEY-HINDAWI, 2021-12-20)Reinforcement learning (RL) agents can learn to control a nonlinear system without using a model of the system. However, having a model brings benefits, mainly in terms of a reduced number of unsuccessful trials before ... -
Biomechanical analysis of all-polyethylene total knee arthroplasty on periprosthetic tibia using the finite element method
(Elsevier, 2022-04-28)Background and objective: Total knee arthroplasty (TKA) with modern all-polyethylene tibial (APT) components has shown high long-term survival rates and comparable results to those with metal-backed tibial components. ... -
Solution to problems caused by associated non-quadratic yield functions with respect to the ductile fracture
(Elsevier, 2022-07-01)Accurate material behaviour and its response to loading are needed for a reliable calibration of ductile failure criteria. Non-quadratic yield functions are often necessary for such a description. Nevertheless, it leads ... -
Influence of mesh density on calculated extreme stresses in aortic aneurysms
(University of West Bohemia, 2016-12-12)The paper deals with evaluation of the influence of finite element mesh density on the resulting extreme stresses in models of abdominal aortic aneurysms. In most patient-specific computational models published recently, ... -
Assessment of crack-related problems in layered ceramics using the finite fracture mechanics and coupled stress-energy criterion
(Elsevier, 2016-06-20)This contribution gives an overview of different fracture-mechanics issues occurring in layered ceramics designed with internal compressive residual stresses (such as the edge cracking, crack arrest by the compressive layer ... -
Description of short fatigue crack propagation under low cycle fatigue regime
(Elsevier, 2016-06-30)Measurement of the short fatigue crack propagation can come across a lot of difficulties from the experimental point of view and interpretation of the results is also sometimes controversial. For simplicity, usual description ... -
Behaviour of a crack in a corner or at a tip of a polygon-like particle
(Elsevier, 2016-07-21)Crack propagation in particle composite materials depends on the properties of a matrix and a particle. A changing combination of the materials of a matrix and a particle together with various shape of the particle can ... -
Lapidus arthrodesis in combination with arthrodesis of the first metatarsophalangeal joint-biomechanical cadaver study comparing two methods of fixation
(Faculty of Medicine and Dentistry, Palacký University Olomouc, 2021-05-11)Aims: To assess the results of a biomechanical test of cadaveric specimens, comparing 2 methods of fixation of modified Lapidus arthrodesis in combination with arthrodesis of the first metatarsophalangeal joint. Methods: ... -
Finite-element modeling of vocal fold self-oscillations in interaction with vocal tract: Comparison of incompressible and compressible flow model
(University of West Bohemia, 2021-07-08)Finite-element modeling of self-sustained vocal fold oscillations during voice production has mostly considered the air as incompressible, due to numerical complexity. This study overcomes this limitation and studies the ... -
Triboelectric Response of Electrospun Stratified PVDF and PA Structures
(MDPI, 2022-01-22)Utilizing the triboelectric effect of the fibrous structure, a very low cost and straightforward sensor or an energy harvester can be obtained. A device of this kind can be flexible and, moreover, it can exhibit a better ...
RSS 1.0