Prohlížení ČVUT - elektronické publikace dle autora "ec99f2ed-2ba9-489e-9f8c-590f0746e33d"

Zobrazují se záznamy 1-12 z 12

    • Asynchronous time integration while achieving zero interface energy 

      Autor: Dvořák, Radim; Kolman, Radek; Falta, Jan; Neühauserová, Michaela
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      This contribution deals with an asynchronous direct time integration of the finite-element model. The proposed method is applied to the phenomenon of wave propagation through an elastic linear continuum. The numerical model ...

    • 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-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 ...

    • INSTRUMENTATION OF SPLIT HOPKINSON PRESSURE BAR FOR TESTING OF CELLULAR METALLIC MATERIALS 

      Autor: Falta, Jan; Zlámal, Petr; Adorna, Marcel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      This paper presents an overview of the custom design instrumentation of a Split Hopkinson Pressure Bar modified for dynamic testing of materials with low mechanical impedance, particularly for cellular metallic materials ...

    • 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 ...

    • 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 ...

    • Stereolithography for manufacturing of advanced porous solids 

      Autor: Drechslerová, Veronika; Neuhäuserová, Michaela; Falta, Jan; Šleichrt, Jan; Kytýř, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2023)
      The aim of this paper is focused on benefits of stereolithography (SLA) technology for the fabrication of the lightweight lattice structures with potential for load-bearing function and high absorption of impact energy. ...

    • 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 ...