103 Works

Research on Influence of TiSi(N) Reflective Coating Thermal Resistance on Energy Absorption of Fireproof Textile Coupled with Auxetic Fabric

Danuta MIEDZIŃSKA, Michał STANKIEWICZ, Roman GIELETA & Konstanty MARSZAŁEK
The research presented in the paper deals with the improvement of firemen protective clothing. The proposed modification of the special textile PROTON is based on the application of TiSi(N) nanocomposite reflective layer, which improves the thermal resistance of the coated material. The second improvement deals with the implementation of auxetic textile into the protective clothing structure. Such material is characterized with the very good blast wave resistance. In the paper both phenomena were studied. The...

Multi-Scale Numerical Analysis of the Effect of Microstructural Features on the Mechanical Behavior of Polycrystalline Ti-6Al-4V Alloy

Fatna BENMESSAOUD, Vincent VELAY, Mohammed CHEIKH, Vanessa VIDAL, Christine BOHER & Farhad RÉZAÏ-ARIA
The present work aims to model the influence of microstructural features of Ti-6Al-4V titanium alloy on its mechanical behavior. A multi-scale approach based on crystal plasticity is considered. The elasto-viscoplastic constitutive equations of Meric-Cailletaud are modified to take into consideration the effect of the grain size by introducing the Hall-Petch relationship at the local scale. This modified model is coupled with finite element calculations under small strain assumption to simulate the monotonic mechanical behavior of...

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...

Virtual Additive Manufacturing Based on Semicrystalline Polymer Polyetheretherketone (PEEK)

Paweł BAJERSKI, Ryszard B. PECHERSKI & Damian CHUDY
Virtual additive manufacturing (AM) is one of the new directions of research that is necessary to improve AM technology. Abaqus/SIMULIA software allows to simulate the whole process using user subroutines to expand solver capabilities. Two of the most important subroutines are UepActivationVol and UMATHT. The UepActivationVol is related to an activation of elements in accordance with the defined path of the process. The second one the UMATHT is used to implement and combine thermal and...

Vibrations of a Double-Beam System with Intermediate Elastic Restraints Due to a Moving Force

Filip ZAKĘŚ & Paweł ŚNIADY
In this paper, we investigate the problem of the dynamic behaviour of a double-beam system with intermediate elastic restraints subjected to a moving point force. Problem is solved by replacing this type of structure with two single-span beams loaded with a given moving force and redundant forces representing reactions in the intermediate restraints. Redundant forces are obtained by solving Volterra integral equations of the second order which are compatibility equations corresponding to each redundant. Solutions...

Droplet bouncing on the surface with micro-structure

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

Registration Year

  • 2019
    103

Resource Types

  • DataPaper
    103

Data Centers

  • Instytut Podstawowych Problemów Techniki PAN
    103

Affiliations

  • Poznań University of Technology
    2
  • Tabor (Poland)
    2
  • Phetchabun Rajabhat University
    1
  • AGH University of Science and Technology
    1
  • Cracow University of Technology
    1
  • Dorodnitsyn Computing Centre
    1
  • China University of Mining and Technology
    1
  • Lublin University of Technology
    1
  • Belgorod State Technological University
    1
  • Urmia University
    1
  • Institute of Fundamental Technological Research
    1
  • KOMAG Institute of Mining Technology
    1
  • University for Development Studies
    1
  • Stellenbosch University
    1