Strain characteristics of cotton yarns depending on the strain rate and methods of their manufacture

Bakhodir Baymuratov,Karim Sultanov,Sabida Ismailova,Shamsidin Tulanov,O Tursunov

doi:10.1051/e3sconf/202130403027

Bakhodir Baymuratov, Karim Sultanov + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202130403027

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Abstract

One of the main reasons for the nonlinearity of the tension diagrams of cotton yarns is the variability of their moduli of elasticity and plasticity under strain. The changes in strain moduli obtained from the tensile diagrams confirm this. The strain curve has ten parameters, the values of which depend on the method of yarn manufacture and the strain rate. Based on the results of processing the tension diagrams of cotton yarn, obtained by carded and combed systems by ring and rotor spinning (CD-carded ring-spun, OE-carded rotor-spun, CM-combed ring-spun), at strain rates from 0,0033 s-1 to 0,033 s-1, the values of these ten parameters were determined and analyzed. Their quantitative and qualitative dependence on the method of their manufacture and strain rate are shown.

Highlights

Experimental determination of the strength of cotton yarns, a decently time-consuming and time-consuming problem
Determining the strength of yarns at high speeds of their movement or at high speeds of their deformation is a complex experimental problem, so the strength of yarns is determined, evaluated and predicted by formulas developed based on the analysis of experimental results [1]
A nonlinear function ES characterizing changes in strain modulus of the yarn is shown in Fig. 1, for a combed ring yarn with a linear density T 29.0 tex, obtained by stretching it to breakage at a speed of 1000 mm/min, determined from the diagram F according to the methods described in [4,5,6]

Summary

Introduction

Experimental determination of the strength of cotton yarns, a decently time-consuming and time-consuming problem. Determining the strength of yarns at high speeds of their movement or at high speeds of their deformation is a complex experimental problem, so the strength of yarns is determined, evaluated and predicted by formulas developed based on the analysis of experimental results [1]. The nonlinearity of the yarn deformation law is suspended by the replacement of it is structures during stretching This is an experimentally proven fact even in classical works [4], it is necessary to load it into the laws of deformation of cotton yarn. This path led to the development of a physical nonlinear elastic-viscoplastic law of deformation of cotton yarn in [5]

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Conclusion