Tensile Property and Fatigue Behaviour of Warp Knitted Fabrics

• Autorzy: Otaghsara M. R. T. , Jeddi A. A. A. , Mohandesi J. A.

Warianty tytułu

PL

Właściwości wytrzymałościowe i zużycie dzianin osnowowych

• Języki publikacji: EN

Abstrakty

EN

Several two fully threaded guide bar warp knitted structures with three different course densities (cpc) were knitted from polyester textured yarns, and their tensile properties and fatigue behavior were investigated. Tensile tests were applied to determine the tensile behaviour of the fabrics and obtain the parameters controlling fatigue behaviour. A number of cycle amplitudes, such as 2, 4, 6, 8, 10 and 12 mm, were applied in fatigue tests. The existence space for yarn movement and the length of the underlaps were considered as structural parameters influencing the corresponding mechanical behaviour. The results show that with an increase in the underlap length, the breaking strain decreases, and the breaking strain in fabrics with a longer underlap in the front guide bar is more than those with the same underlap length in the back guide bar. There is no meaningful relationship between cpc and breaking stress. Repeated extension causes stress relaxation and secondary creep and subsequent strain softening in warp knitted structures. The cyclically stabilised stress of fabrics was increased by raising the amplitude of extension and/or by increasing the length of the underlap. Also the cyclic stabilised stress of fabrics with a longer underlap in the back guide bar was higher than those with the same length of the underlap in the front guide bar. There is no distinguished trend between the cyclic stabilised stress and cpc of fabrics.

PL

Wykonano szereg dzianin z teksturowanej przędzy PES za pomocą maszyny z dwoma w pełni nawleczonymi grzebieniami igielnicowymi z różną gęstością rządkową a następnie badano ich właściwości wytrzymałościowe i zachowanie się przy użytkowaniu. Przy testach zużycia stosowano cykle obciążenia o amplitudach 2, 4, 6, 8, 10 i 12 mm. Jako parametry strukturalne determinujące parametry mechaniczne dzianiny uwzględniono istniejące przestrzenie dla ruchu włókna oraz długość rzutu grzebieni igielnicowych za igłami. Na podstawie wykonanych badań opisano szczegółowo zależności pomiędzy poszczególnymi parametrami.

Słowa kluczowe

EN

warp knitted fabrics; cyclic loading; fatigue; tensile; stabilised load; strain softening; fabric density

PL

właściwości wytrzymałościowe tkaniny; gęstość tkaniny; zużycie tkaniny

• Wydawca: Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny
• Czasopismo: Fibres & Textiles in Eastern Europe
• Rocznik: 2009
• Tom: Vol. 17, no. 3 (74)
• Strony: 70--75
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Otaghsara M. R. T.

• Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran

autor

Jeddi A. A. A.

• Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran

autor

Mohandesi J. A.

• Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran

Bibliografia

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• 2. Lyons W. J., Ribnick, A. S.; “Fatigue in Textile Res. J., Part X. Fatiguing by Cyclic Tension: Infuence of Temperature on Lifetime and Growth”, Textile Res. J., 37, 1014-1019, (1967).
• 3. Lyons W. J.; “Fatigue in Textile fbres, Part XI. Fatiguing by Cyclic Tension: Effects of Temperature, stroke and frequency on Lifetime”, Textile Res. J., 40, 60-68, (1970).
• 4. Lyons W. J.; “Fatigue in Textile fibres, Part XII. Fatiguing by cyclic tension at constant Force Amplitude”, Textile Res. J., 40, 836-843, (1970).
• 5. Lyons W. J.; “Fatigue in Textile Fibres, Part XIII. Fatiguing by Cyclic Tension: Comparison on Lifetimes Obtained by Two Methods of Loading”, Textile Res. J., 40, (1970).
• 6. Lyons W. J.; “Fatigue in Textile Fibres. Part II. Fatigue by Cyclic Tension: Effect of Frequency and Stroke and other Evaluations “, Textile Res. J., 32, 553-560, (1962).
• 7. Prevorsek D. C., Lyons W. J.; “Fatigue in Textile Fibres. Part IV. Fatigue by Cyclic Tension: Effect of Stroke on the Statistics of Lifetime”, Textile Res. J., 34, 881-888,(1964).
• 8. Narisava I., Shikawa M. I., Ogawa H.; “Fatigue Process in Highly oriented Nylon 6 Fibres”, J. of Poly. Sci: Poly. Phys. Ed., 15, 1055-1066, (1977).
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• 10. Jeddi Ali A. A., Nosraty H., Taheri Otaghsara M. R., Karimi M. “A Comparative Study of the Tensile Fatigue Behavior of Cotton-Polyester Blended Yarn by Cyclic Loading”, Journal of Elastomers and Plastics, 39, 165-179, (2007).
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• 12. Jeddi Ali A. A., Taheri Otaghsara, M. R., Ali Babaei H. R., “Investigation of fatigue behavior of warp knitted fabrics under cyclic tension”, Plastic, Rubber and Composites, 33, 141-1482007 (2004). Received 25.06.
• 13. Abdessalem S. B., Elmarzougui S., Sakli F.; “ Dynamic Fatigue of Plain Knitted Fabrics” Journal of Textile and Apparel, Technology and Management, 5, 1-10, (2006).
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