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Strength Tests of 3D Warp-Knitted Composites with the Use of the Thermovision Technique

Research and development

Authors:

• Pieklak Katarzyna
  Poland, Łódź, Technical University of Lodz, Department of Knitting Technology
• Mikołajczyk Zbigniew (j/w)

Full text

Abstract: The article presents the results of strength tests of thin-walled composite beams carried out with the use of the thermovision technique. During a beam bending test performed in a four-point support system using a testing machine, an increase in the value of the temperature on the surface of the beam was observed along with an increase in the bending input function (deflection of the beam). The curve of force (stress) is correlated with curves of changes in the values of heat emitted during the bending process. The maximum value of temperature rise of the bending composite reaches the value of ΔT = 20.02 °C. The process of the bending of a beam is accompanied by a conversion of mechanical energy into free surface energy, thermal energy as a result of damaged atomic and intermolecular bonds, and also thermal energy occurring due to friction force acting between the destroyed surfaces. The experiments carried out confirm the thesis that analysis of the temperature distribution of composites in strength tests is the basis for the quality evaluation of stress distribution in the composites tested.

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Citation: Pieklak K., Mikołajczyk Z.; Strength Tests of 3D Warp-Knitted Composites with the Use of the Thermovision Technique. FIBRES & TEXTILES in Eastern Europe 2011, Vol. 19, No. 5 (88) pp. 100-105.

Published on issue no 5 (88) / 2011, pages 100–105.

"Fibres & Textiles in Eastern Europe" is inserted on the "ISI Master Journal List" of the Institute for Scientific Information, Philadelphia, USA (for the year 2010 has an Impact Factor of 0.629) and is indexed in Research Alert, SCI Expanded (Sci Search and Web of Science), the Materials Science Citation Index, Current Contents/Engineering, Computing & Technology; as well as by the Textile Institute, Manchester, in the Information Service; and in Toga FIZ Technik; Rapra Technology Ltd.; Elsevier Geo Abstracts; Textiles Eastern Europe - World Textile Publications; Applied Mechanics Review; Chemical Abstracts Service; Referativny hurnal; and by the European Textile Network.

The content of "Fibres & Textiles in Eastern Europe" is available by free open access on the website http://www.fibtex.lodz.pl, starting from issue No 3/2002.