Identification of the Process of Dynamic Stretching of Threads in Warp-Knitting Technology

• Autorzy: Prążyńska A. , Mikołajczyk Z.

Identyfikatory

DOI

10.1515/aut-2016-0039

• Języki publikacji: EN

Abstrakty

EN

The publication presents a theoretical study of the susceptibility of rheological models of threads to dynamic stretching in the context of modern, highly efficient textile technologies. Input parameters of the four analyzed models, the Kelvin-Voigt model, the Maxwell model, Standard model 2, and the Zener model, corresponded to the actual values of the coefficients of viscosity, elasticity, kinematic and dynamic loading, and stretching speed for the analyzed polyester silk threads produced in a knitting process, with knitting speeds from 700 to 1,600 courses/min. The research proves that the tested thread models behave differently in the stretching process-the Kelvin-Voigt model is sensitive to both the increases in kinematic loading and viscosity coefficient, Standard model 2 is only susceptible to dynamic stiffness, and the Zener model is significantly sensitive to kinematic loading. All responses of the models increase with the increase in stretching speeds. The obtained results indicate substantial “accuracy tolerance” in setting input parameters while identifying dynamics of the knitting process on warp-knitting machines.

Słowa kluczowe

EN

rheological models; stretching threads; knitting; warp-knitting machines; elasticity; viscosity coefficient

PL

modele reologiczne; rozciąganie nici; dzianie; maszyny dziewiarskie; elastyczność; współczynnik lepkości

• Wydawca: Lodz University of Technology, Faculty of Material Technologies and Textile Design
• Czasopismo: Autex Research Journal
• Rocznik: 2017
• Tom: Vol. 17, no. 4
• Strony: 334--343
• Opis fizyczny: Bibliogr. 15 poz.

Twórcy

autor

Prążyńska A.

• Department of Knitting Technology, Lodz University of Technology 116 Żeromskiego St., 90-924 Łódź, Poland

autor

Mikołajczyk Z.

• Department of Knitting Technology, Lodz University of Technology 116 Żeromskiego St., 90-924 Łódź, Poland

Bibliografia

• [1] Urbańczyk G] Fiber Physics. Physical properties of fibers. (in Polish) Publishing House of Lodz University of Technology, Łódź 2002, p. 420.
• [2] Kobza W., Gluza J., Technical mechanics and rheology. (in Polish) Handbook of TUL, Łódź 1991, p. 476.
• [3] Kopias K. Technology of warp knitted fabrics. (in Polish) WNT, Warszawa 1984, p. 177.
• [4] Szosland J., Czołczyński M. Propagation speed of the tension impulse in threads. ( in Polish) Textile Review nr 27, Warszawa 1973, pp 122 - 127.
• [5] Sajdl R. Modellierung der Beanspruchung beim Schusseintrag an Webmaschinen. Review of scientific and research works Moscow, Liberec, Łódź, Karl-Marx-Stat, 1985.
• [6] Kowalski K. Identification of dynamic forces in the threads on weft-knitting machines based on computer simulation and digital measurement technology. (in Polish) Science notebooks, Łódź 1991, pp. 17 - 22.
• [7] Vangheluwe L. Displacement model of the fabric edge as a result of relaxation during stoppage time of the loom. International Conference IMTEX, Łódź, May 1995.
• [8] Bauer, Winkler Relaxationsuntersuchungen an polymeren Festkorpern unter dem Aspekt der experimentellen Systemanalyse. Faserforschung und Textiltechnik 26, 1975 .
• [9] Reuman R.D. Tests of polyamide monofilaments at high stretching speeds. Textile Review nr 9, Warszawa 1979 , pp. 494 - 498.
• [10] Żurek W. Modified rheological model of a filament. (in Polish) Scientific Conference of Textile Faculty Łódź 1998.
• [11] P. Mailler, G. Nemoz*, P. Hamelin** Long term behavior characterization of coated fabrics for architecture membrane under biaxial loading. Spring 1997, * Institut Textile de France D.R.LYON, ** L2M2S Université Claude Bernard Lyon I.
• [12] Lasič V., Srdjak M. The Application of Alfrey’s Model for the Stress - Deformation Analysis of Locknit Fabrics. July/August 1995.
• [13] Nowacki W. Theory of creep. (in Polish) Arkady Warsaw 1963, Issue I, 171p.
• [14] Jakowluk A. Creep processes and fatigue in materials. (in Polish) WNT, Warsaw 1993, Issue I, ISBN 83-204-1542-X, 483p.
• [15] Derski W., Ziemba S. Analysis of rheological models. (in Polish) Polish Scientific Publishers PWN, Warsaw 1968, Issue I,

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).