139 Works

Influence of initial density of granular stack on transient regime of homogeneous fluidization

A. S. Drame

Droplet bouncing on the surface with micro-structure

T. BOBINSKI, G. SOBIERAJ, M. PSARSKI, G. CELICHOWSKI & J. ROKICKI

Approaches to the Determination of the Working Area of Parallel Robots and the Analysis of Their Geometric Characteristics

Dmitry MALYSHEV, Mikhail POSYPKIN, Larisa RYBAK & Alexander USOV
The article presents and experimentally confirms two approaches to the problem of determining the working area of parallel robots using the example of a planar robot DexTAR with two degrees of freedom. The proposed approaches are based on the use of constraint equations of coordinates. In the first approach, the original kinematic equations of coordinates in the six-dimensional space (two coordinates describing the position of the output link and four coordinates – the rotation angles...

Acceleration feature points of unsteady shear flows

J. KASTEN, J. REININGHAUS, I. HOTZ, H.-C. HEGE, B. R. NOACK, G. DAVILLER & M. MORZYŃSKI

Behaviour of concrete reinforced with fibers from end-of-life tires under high compressive strain rates

Małgorzata PAJĄK, Jacek JANISZEWSKI & Leopold KRUSZKA

Acoustic characteristics of damped metamaterial plate with parallel attached resonators

T. WANG, M.P. SHENG, Z.W. GUO & Q.H. QIN

Development of Non-Contact Fatigue Crack Propagation Monitoring Method Using Air-Coupled Acoustic Emission System

Takuma MATSUO & Daisuke HATANAKA
A monitoring system for fatigue crack propagation was developed using a non-contact acoustic emission (AE) monitoring system. The AE signals generated during the plane bending fatigue test were first monitored. The AE generation rate increased after approximately 0.5 of the fatigue life ratio. The maximum amplitude of the AE signals increased with a tendency similar to that of the crack propagation. The sensor sensitivities for the flat and arced surfaces were then compared. The sensitivity...

A Reliable Numerical Algorithm for the Fractional Klein-Gordon Equation

Harendra SINGH, Devendra KUMAR, Jagdev SINGH & C.S. SINGH

Bogie Steering System Improving Alignment of the Urban Railway Vehicle in a Track

Michał PODOLSKI, Maciej SŁABUSZEWSKI, Bartosz FIRLIK & Tomasz STAŚKIEWICZ

A Mechanical Model of Heart Valves with Chordae for in Silico Real-Time Computations and Cardiac Surgery Planning

Gediminas GAIDULIS, Rimantas KAČIANAUSKAS, Natalya KIZILOVA & Yury ROMASHOV

Experimental and Theoretical Study on Screwed Connections in Cold-Formed Steel Structure

Rattanasak HONGTHONG, Apai BENCHAPHONG, Sutera BENCHANUKROM & Nirut KONKONG
This research aims to study the fastening rotation behavior of cold-formed steel screw connections by experimental testing and analytical modelling. Both the experimental test and finite element results showed the failure modes of tilting and bearing failure. The rotation failure mode of the screw connection was studied by an analytical method using a spring model with screw-plate stiffness which included the bending and shear stiffness of the screw and the bearing stiffness of the screw...

A backup orientation system based on inverse problems technique

Aleksey V. NENAROKOMOV, Evgeny V. CHEBAKOV, Irina V. KRAINOVA, Dmitry L. REVIZNIKOV & Alena V. MORZHUKHINA

Influence of Rotation on Transversely Isotropic Piezoelectric Rod Coated with a Thin Film

Rajendran SELVAMANI & Oluwole Daniel MAKINDE

Analysis of laminar and turbulent natural, mixed and forced convection in cavities by heatlines

I. HERNÁNDEZ-LÓPEZ, J. XAMÁN, G. ÁLVAREZ, Y. CHÁVEZ & J. ARCE

Experimental veri cation of a numerical model of RC beam with CFRP rope strengthening

Michał SZCZECINA, Paweł TWORZEWSKI & Kamil BACHARZ

Acoustic propagation in inhomogeneous fluids: regularization via the introduction of fine particles

P.M. Jordan
It is shown, using analytical methodologies, that the velocity field blow-up suffered by vertically ascending acoustic waves in an isothermal atmosphere can be eliminated via the introduction of fine particles. Assuming the inhomogeneous generalization of the particle-laden flow model known as the (linearized) Marble–Thompson model-1, it is established that bounded, exponentially decreasing, shock amplitudes can be obtained provided the mass fraction of particles exceeds a critical value, for which an exact expression is derived. Lastly,...

Random composite: stirred or shaken?

S. GLUZMAN, V. MITYUSHEV, W. NAWALANIEC & G. SOKAL

Tilt Measurements in Mechatronic Devices and Mobile Microrobots

Sergiusz ŁUCZAK

Impact of Thermophoretic Transport of Al2O3 Nanoparticles on Viscoelastic Flow of Oil-Based Nanofluid over a Porous Exponentially Stretching Surface with Activation Energy

Christian John ETWIRE, Ibrahim Yakubu SEINI, Musah RABIU & Oluwole Daniel MAKINDE
The influence of thermophoretic transport of Al2O3 nanoparticles on heat and mass transfer in viscoelastic flow of oil-based nanofluid past porous exponentially stretching surface with activation energy has been examined. Similarity technique was employed to transform the governing partial differential equations into a coupled fourth-order ordinary differential equations which were reduced to a system of first-order ordinary differential equations and then solved numerically using the fourth-order Runge-Kutta algorithm with a shooting method. The results for...

Improvement and unification of input images for photogrammetric reconstruction

Krzysztof SKABEK, Piotr ŁABĘDŹ & Paweł OZIMEK

Similarity detection based on document matrix model and edit distance algorithm

Artur NIEWIAROWSKI

Inverse estimation of model parameters for newborn brain cooling process simulations

Dominika BANDOŁA, Ziemowit OSTROWSKI, Marek ROJCZYK, Wojciech WALAS, Zenon HALABA & Andrzej J. NOWAK

Study of the Distribution of Normal Contact Pressure Between Parts Joined in a Multi-Bolted System under Operational Loads

Rafał GRZEJDA
Modelling and calculations of unsymmetrical multi-bolted connections treated as a system for different bolt models and contact layer models between the joined parts are presented. The modelling refers to preloaded and externally loaded connections. The systemic models of the connection for two substitute models of bolts are shown. Between the joined parts two types of the Winkler model of a contact layer are taken into consideration. Calculations were made for an exemplary unsymmetrical connection. Its...

Theoretical and Numerical Analyses of an Aluminium-Concrete Composite Beam with Channel Shear Connectors

Łukasz POLUS & Maciej SZUMIGAŁA
This paper presents a numerical simulation and a theoretical investigation of an aluminiumconcrete composite (ACC) beam subjected to bending. ACC structures are similar to steel-concrete composite (SCC) structures. However, their girders are made of aluminium instead of steel. The use of ACC structures is limited because of the lack of relevant design rules. Due to this fact the authors suggest applying the theory for SCC structures to ACC structures. In this paper, the methods for...

Numerical Modelling of Post-Ground Subsystem in Road Safety Barrier Crash Tests

Marian KLASZTORNY, Daniel Bronislaw NYCZ, Pawel DZIEWULSKI, Roman GIELETA, Michal STANKIEWICZ & Karol ZIELONKA
A new analytical algorithm for determining the elastoplastic parameters for soft, medium and hard plastic cohesive soils, corresponding to *MAT_005_SOIL_AND_FOAM material model available LS-Dyna FE code, was formulated. The numerical modelling of the post-soil subsystem, applicable in the modelling of road safety barrier crash tests using this material model of the roadside dehydrated ground, was developed. The methodology was presented on the example of a Sigma-100 steel post partly driven into the soil and subjected...

Registration Year

  • 2018
    21
  • 2019
    114
  • 2020
    4

Resource Types

  • DataPaper
    139

Affiliations

  • Poznań University of Technology
    4
  • Tabor (Poland)
    3
  • Phetchabun Rajabhat University
    2
  • AGH University of Science and Technology
    2
  • Cracow University of Technology
    1
  • Dorodnitsyn Computing Centre
    1
  • China University of Mining and Technology
    1
  • Lublin University of Technology
    1
  • Przemysłowy Instytut Motoryzacji
    1
  • Jan Grodek State Vocational Academy in Sanok
    1
  • Silesian University of Technology
    1
  • Belgorod State Technological University
    1
  • Urmia University
    1
  • Institute of Fundamental Technological Research
    1
  • Rajamangala University of Technology
    1