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Online Course

Theory of Yarn Structure

Indian Institute of Technology Delhi and NPTEL via Swayam

Overview

This course deals with a system of theoretically derived inherent laws of structures and properties of yarns. Each module of this course is started with definitions, terminologies and fundamental relations. Then, the theoretical models are presented namely from the initial assumptions through the mathematical derivation to the final relations. Such theoretical results are mostly compared with the experimental ones. The topics in this course include basic characteristics of fibers and yarns; relation among yarn count, twist, and diameter; helical model of fibers in yarns; mass irregularity of yarns; radial fiber migration in yarns; yarn shrinkage due to washing; and tensile mechanics of yarns.
INTENDED AUDIENCE: Interested studentsPREREQUISITES : BE/BTech in Textile TechnologylINDUSTRY SUPPORT : Trident, Arvind, Welspun

Syllabus

COURSE LAYOUT

Week 1 : Fiber – The Building block of yarnsWeek 2 : Basic characteristics of yarnsWeek 3 : Relation among yarn count, twist, and diameterWeek 4 : Helical model of fibers in yarnsWeek 5 : Mass irregularity of yarnsWeek 6 : Radial fibre migration in yarnsWeek 7 : Yarn shrinkage due to washingWeek 8 : Tensile mechanics of yarns - Part IWeek 9 : Tensile mechanics of yarns - Part IIWeek 10 : Tensile mechanics of yarns - Part IIIWeek 11 : Tensile mechanics of yarns - Part IVWeek 12 : Strength-length relation in yarn

Taught by

Prof. Dipayan das

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