Prohlížení Časopisy dle autora "d2c55467-703e-4b29-bf0e-5a9e798dab9b"
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COMPRESSIVE PROPERTIES OF AUXETIC STRUCTURES WITH CONTROLLED STIFFNESS OF STRUT JOINTS
Autor: Doktor, Tomáš; Fíla, Tomáš; Koudelka, Petr; Kytýř, Daniel; Jiroušek, Ondřej
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)Presented paper deals with experimental study on compressive properties of auxetics with controlled stiffness of strut joints. The variable strut joints properties were simulated by adding extra amount of material in the ... -
Computed tomography system with strict real-time synchronization for in-situ 3D analysis of periodically vibrating objects
Autor: Rada, Václav; Fíla, Tomáš; Zlámal, Petr; Koudelka, Petr; Šleichrt, Jan; Macháček, Michael; Vavřík, Daniel; Kytýř, Daniel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)In the contribution, we present a laboratory system capable of X-ray computed tomography (XCT) scanning of an periodically moving or oscillating object. The system is an in-house developed XCT setup with electromagnetic ... -
DEFORMATION BEHAVIOUR OF GELLAN GUM BASED ARTIFICIAL BONE STRUCTURES UNDER SIMULATED PHYSIOLOGICAL CONDITIONS
Autor: Krčmářová, Nela; Šleichrt, Jan; Fíla, Tomáš; Koudelka, Petr; Kytýř, Daniel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2017)The paper deals with investigation of deformation behaviour of gellan gum (GG) based structures prepared for regenerative medicine purposes. Investigated material was synthesized as porous spongy-like scaffold reinforced ... -
DIRECT MEASUREMENT OF REACTION FORCES DURING FAST DYNAMIC LOADING
Autor: Falta, Jan; Adorna, Marcel; Fíla, Tomáš; Zlámal, Petr
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)The presented paper is focused on embedding of the serially manufactured piezo-electric impact loadcell into Open Hopkinson Pressure Bar (OHPB) and it’s modifications for a direct force measurement during dynamic loading. ... -
Effect of aging on mechanical properties of 3D printed samples using stereolitography
Autor: Drechslerová, Veronika; Falta, Jan; Fíla, Tomáš; Dvo˚řák, Radim; Kytýř, Daniel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)This paper focuses on stereolithography (an additive manufacturing technology working on the principle of curing liquid resins layer by layer using ultraviolet radiation) and the effect of aging on the mechanical properties ... -
EVALUATION OF HOPKINSON BAR EXPERIMENTS USING MULTIPLE DIGITAL IMAGE CORRELATION SOFTWARE TOOLS
Autor: Adorna, Marcel; Brodner, Stefan; Falta, Jan; Zlámal, Petr; Fíla, Tomáš
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)Three different tools for Digital Image Correlation (DIC) were used for evaluation of dynamic experiments performed using custom Open Hopkinson Pressure Bar (OHPB) apparatus. High strain-rate measurements were performed ... -
HIGH STRAIN-RATE COMPRESSIVE TESTING OF FILLING MATERIALS FOR INTER-PENETRATING PHASE COMPOSITES
Autor: Doktor, Tomáš; Fíla, Tomáš; Zlámal, Petr; Kytýř, Daniel; Jiroušek, Ondřej
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)In this study behavior of the selected types of filling material for the inter-penetrating phase composites was tested in compressive loading mode at low and high strain-rates. Three types of the filling material were ... -
High-speed X-ray radiography for experiments in impact dynamics using high-power X-ray tube, cesium iodine scintillator and laboratory optical camera
Autor: Šleichrt, Jan; Falta, Jan; Fíla, Tomáš
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)X-ray radiography and computed tomography have become well-established methods for investigation of internal structure of objects and for defectoscopy. Recently, the methods have even been used for in-situ analysis of ... -
IMPACT TESTING OF ORDNANCE GELATINE UNDER MODERATE STRAIN RATE CONDITIONS
Autor: Doktor, Tomáš; Zlámal, Petr; Šleichrt, Jan; Fíla, Tomáš; Kytýř, Daniel
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)An experimental study on energy absorption capabilities and strain rate sensitivity of ordnance gelatine was performed. Strain energy density under quasi static compression and moderate strain rate impact tests was compared. ... -
IN-SITU COMPRESSION TEST OF ARTIFICIAL BONE FOAMS IN CONTROLLED ENVIRONMENT USING X-RAY MICRO-COMPUTED TOMOGRAPHY
Autor: Glinz, Jonathan; Kytýř, Daniel; Fíla, Tomáš; Šleichrt, Jan; Schrempf, Andreas; Fürst, David; Kastner, Johann; Senck, Sascha
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)In this study, we investigated specimens of artificial bone foams, developed by the research group for surgical simulators at the UAS Linz, which are used to mimic the haptic feedback of physiologic and pathologic bone for ... -
INSTRUMENTATION OF FOUR-POINT BENDING TEST DURING 4D COMPUTED TOMOGRAPHY
Autor: Kytýř, Daniel; Fíla, Tomáš; Koudelka, Petr; Kumpová, Ivana; Vopálenský, Michal; Vavro, Leona; Vavro, Martin
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)High-resolution time-lapse micro-focus X-ray computed tomography is an effective method for investigation of deformation processes on volumetric basis including fracture propagation characteristics of non-homogeneous ... -
Mechanical properties of basalt: a study on compressive loading at different strain rates using SHPB
Autor: Falta, Jan; Krčmářová, Nela; Fíla, Tomáš; Vavro, Martin; Vavro, Leona
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)This article focuses on the mechanical properties of basalt in compressive loading at different strain-rates. The study employs advanced instrumentation for the evaluation of the results in dynamic conditions, while standard ... -
MULTI-CHANNEL CONTROL SYSTEM FOR IN-SITU LABORATORY LOADING DEVICES
Autor: Rada, Václav; Fíla, Tomáš; Zlámal, Petr; Kytýř, Daniel; Koudelka, Petr
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)In recent years, open-source applications have replaced proprietary software in many fields. Especially open-source software tools based on Linux operating system have wide range of utilization. In terms of CNC solutions, ... -
NUMERICAL MODELLING OF WAVE SHAPES DURING SHPB MEASUREMENT
Autor: Dvořák, Radim; Koudelka, Petr; Fíla, Tomáš
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)The paper aims at the numerical simulation of the wave propagation in compressive Split Hopkinson Pressure Bar (SHPB) experiment. The paper deals with principles of SHPB measurement, optimisation of a numerical model and ... -
PREPROCESSING OF HOPKINSON BAR EXPERIMENT DATA: FILTER ANALYSIS
Autor: Adorna, Marcel; Falta, Jan; Fíla, Tomáš; Zlámal, Petr
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)This work presents a data preprocessing procedure for signal acquired during high strain-rate loading using a custom Split Hopkinson Pressure Bar (SHPB). Before the evaluation of the experimental data, preprocessing of the ... -
Response of the ultra high performance concrete under dynamic compressive loading
Autor: Krčmářová, Nela; Falta, Jan; Fíla, Tomáš; Čítek, David
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)Ultra high performance concrete is a modern cementitious material which exhibits excellent mechanical properties such as damage tolerance, fracture toughness and durability. These features make this materials suitable for ... -
STRAIN-RATE AND PRINTING DIRECTION DEPENDENCY OF COMPRESSIVE BEHAVIOUR OF 3D PRINTED STAINLESS STEEL 316L
Autor: Neuhäuserová, Michaela; Koudelka, Petr; Falta, Jan; Adorna, Marcel; Fíla, Tomáš; Zlámal, Petr
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2019)The paper is focused on evaluation of the relation between mechanical properties of 3D printed stainless steel 316L-0407 and printing direction (i.e. the orientation of the part which is being printed in the manufacturing ... -
TESTING OF HYBRID NICKEL-POLYURETHANE FOAMS AT HIGH STRAIN-RATES USING HOPKINSON BAR AND DIGITAL IMAGE CORRELATION
Autor: Adorna, Marcel; Zlámal, Petr; Fíla, Tomáš; Falta, Jan; Felten, Markus; Fries, Michael; Jung, Anne
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)In this paper Split Hopkinson pressure bar (SHPB) was used for dynamic testing of nickel coated polyurethane hybrid foams. The foams were manufactured by electrodeposition of a nickel coating on the standard open-cell ...