127 Works

Performance Evaluation and Frequency Response Analysis of a Two Stage Two Spool Electrohydraulic Servovalve with a Linearized Model

Nitesh MONDAL & Biswanath DATTA
This article focuses on the performance study and frequency response analysis with the state space model of a linearized two stage two spool non-conventional electrohydraulic servovalve from a set of nonlinear state equations. The performance of this valve depends on many valve geometries and fluid parameters. This non-conventional electrohydraulic servovalve is controlled by a pressure controlled pilot, which generates a differential pressure between the upper and lower chambers of two spools. This differential pressure acts...

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...

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...

Crystallization Kinetics of Polyamide 2200 in the Modelling of Additive Manufacturing Processes by FE Analyses

Paweł BAJERSKI, Ryszard B. PĘCHERSKI, Damian CHUDY & Leszek JARECKI
The thermoplastic polymers present amorphous or semi-crystalline structures which are very important factors in describing volumetric shrinkage. The thermoplastic materials are commonly used for production of daily life products, industrial or as the prototypes. Different techniques of manufacturing polymer structures are considered like: injection molding, extrusion, milling, additive manufacturing (AM). AM is a very fast developing field in the manufacturing and research. Unfortunately, components or prototypes made using the thermoplastic semi-crystalline materials in 3D techniques...

Bending of a Seven Layer Beam with Foam Cores

Krzysztof MAGNUCKI, Szymon MILECKI, Jerzy LEWIŃSKI & Piotr KĘDZIA

Reconstruction of selected operating parameters of a thermoelectric device

Iwona NOWAK, Ryszard BUCHALIK & Grzegorz NOWAK

An optimal design of thermal protection based on materials morphology

Margarita O. SALOSINA, Oleg M. ALIFANOV & Aleksey V. NENAROKOMOV

Registration Year

  • 2018
    24
  • 2019
    103

Resource Types

  • DataPaper
    127

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