Zobrazují se záznamy 1-16 z 16

    • 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 ...
    • UTILIZATION OF IMAGE AND SIGNAL PROCESSING TECHNIQUES FOR ASSESSMENT OF BUILT HERITAGE CONDITION 

      Autor: Koudelka, Petr; Koudelková, Veronika; Doktor, Tomáš; Kumpová, Ivana; Kytýř, Daniel; Valach, Jaroslav
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Historical buildings represent invaluable heritage from the past and therefore their protection is a very important task. Assessment of their condition must not cause damage accumulation, thus the least possible volume ...
    • BASIC BIOMECHANICAL CHARACTERIZATION OF POLYURETHANE BASED ARTIFICIAL CANCELLOUS STRUCTURES 

      Autor: Šleichrt, Jan; Kytýř, Daniel; Pithartová, Kateřina; Senck, Sascha; Fürst, David; Schrempf, Andreas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The main goal of this study is to validate elementary mechanical parameters of a newly designed open-cell foam. The purpouse for investigating artificial material is to approach the properties of the human bone in the case ...
    • 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. ...
    • INFLUENCE OF PRINTING AND LOADING DIRECTION ON MECHANICAL RESPONSE IN 3D PRINTED MODELS OF HUMAN TRABECULAR BONE 

      Autor: Doktor, Tomáš; Kumpová, Ivana; Wroński, Sebastian; Śniechowski, Maciej; Tarasiuk, Jacek; Forte, Giancarlo; Kytýř, Daniel
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The paper deals with investigation on directional variations of mechanical response in 3D printed models of human trabecular bone. Sample of trabecular bone tissue was resected from human donor and 3D model was obtained ...
    • NUMERICAL MODELLING OF COMPRESSIVE CHARACTERISTICS OF AUXETIC STRUCTURES 

      Autor: Neuhäuserová, Michaela; Koudelka, Petr
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The paper is focused on numerical analysis of mechanical behaviour of auxetic structures with re-entrant tetrakaidecahedral unit cell subjected to uni-axial quasi-static compression. The mechanical behaviour was evaluated ...
    • MODELLING AND SIMULATION OF LATTICE STRUCTURES USING VARIOUS MATERIAL MODELS FOR POLYMERIC MATERIALS 

      Autor: Lehner, Kerstin; Kalteis, Anna; Major, Zoltan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Based on lightweight design concepts, lattices are increasingly considered as internal structures. This work deals with the simulation of periodically constructed lattices to characterize their behaviour under different ...
    • MECHANICAL MODEL FOR HUMAN BALANCING ON ROLLING BALANCE BOARD 

      Autor: Molnar, Csenge A.; Zelei, Ambrus; Insperger, Tamas
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      A two-degree-of-freedom mechanical model was developed to analyze human balancing on rolling balance board in the frontal plane. The human nervous system is modeled as a proportionalderivative controller with constant ...
    • MODELLING AND SIMULATION OF ROCKING SUITCASES 

      Autor: Horvath, Hanna Zsofia; Takacs, Denes
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The rocking motion of two-wheeled suitcases is investigated. A rigid body mechanical model of the suitcase is constructed. All of the possible motion states (both wheels on the ground, one wheel on the ground, none of the ...
    • 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 ...
    • 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, ...
    • 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 ...
    • CHARACTERIZATION OF THE FRACTURE MECHANICAL BEHAVIOR OF C-SMC MATERIALS 

      Autor: Tiefenthaler, Martin; Stelzer, Philipp S.; Chung, Chi N.; Reisecker, Volker; Major, Zoltan
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      The fracture mechanics of random discontinuous Carbon Fiber Sheet Molding Compound (C-SMC) materials compared to traditional carbon fiber composites are not well understood. An experimental study was carried out to ...
    • OPTIMIZATION OF DECOMPRESSIVE CRANIECTOMY BASED ON FINITE ELEMENT SIMULATIONS 

      Autor: Hazay, Mate; Bakos, Bernadett; Toth, Peter Jozsef; Buki, Andras; Bojtar, Imre
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Decompressive Craniectomy (DC) is a neurosurgical procedure which is often applied to decrease the intracranial pressure (ICP), even if its optimal execution in terms of the size and location of the skull opening is not ...
    • 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 ...
    • EXPERIMENTAL INVESTIGATION OF THE FAILURE BEHAVIOUR OF POLYPROPYLENE COMPOUNDS FOR INSTRUMENTED PUNCTURE TESTS 

      Autor: Kiehas, Florian; Kalteis, Anna; Jerabek, Michael; Major, Zoltán
      (České vysoké učení technické v PrazeCzech Technical University in Prague, 2018)
      Instrumented puncture tests according to ISO 6603-2 and ASTMD3763 were executed for five different Polypropylene compounds (talcum-, glass fibre- and elastomer modified) with specimen thicknesses ranging from 1mm to 4 mm. ...