Textile physics provides essential knowledge for textile engineering. It covers topics like yarn geometry, fabric geometry, and mechanical properties that help understand how materials behave and are used. Specifically, textile physics informs calculations like yarn diameter and strength; fiber distribution in yarns; relationships between twist, count, and strength; fabric permeability and crimp; and mechanical properties like fatigue, creep, breaking strength, and dimensional changes from swelling. Understanding these fundamentals from textile physics is necessary for extracting properties from fabrics and controlling fabrication processes in textile engineering.

1. Assignment
TE-2603
Topics:-The relevancy of textile physics in the field of textile
engineering.
Submitted by:-
Name:- Mahbubay Rabbani
ID:- 175035
Semester & Year:- 2/2
Department:-TE
Dhaka University of Engineering & Technology (DUET), Gazipur

2. The relevancy of textile physics in the field of textile engineering
Textile physics is an important part in textile engineering field. Textile physics
gives us the idea about yarn geometry, fabric geometry and also mechanical
properties. They helps us to get concepts about the information which have impact
on materials end behaviors or real life uses. Now I describe about the relevancy in
the field with those ideas in the below in brief.
 From Yarn Geometry:-
 From yarn geometry we learn about the calculation of yarn diameter
which is used in our practical life.
 We also know about the distributions of the fibers in the yarn that
means how the fibers are lie in the yarn and we get concept about the
strength type of the material.
 Again from that topic we know about the fiber migration that means
how the fibers migrated into the yarn and we get the idea of spinning
triangle from fiber migration which is related to yarn breakage in the
spinning process.
 Also know about the relationship between yarn twist and count and
from this relationship we realize about optimum twist factor. Here we
notice that twist is directly related with the strength.
 We know about the effect of static electricity due to friction and how
can we overcome from this problem.
 From Fabric Geometry:-
 From fabric geometry we get concept about fabric permeability that
means whether the fabric is permeable or not and we know where they
used.
 From that topics we know about the fabric crimp in details.
 We also know the crimp interchange that means warp and weft
jamming and their effects.
 We know the pick spacing and end spacing.
 We know the tensile properties on woven fabrics.
 We get the idea about using of same twisted yarns and opposite
twisted yarns in the fabric and how can they used for various effects
during weaving.
 From Mechanical Properties:-

3.  We get the idea about fatigue, creep etc. for which we assume the
durability of the fabric.
 We know about the breaking strength and from this we calculate the
breaking load at which the material is fractured.
 With swelling concept we know about the shrinkage and dimension
change in the yarn or fabric. Again we know the creep effect when
twist angle is increased due to swelling.
 Again we know from swelling effect about the permeability and by
applying this concept we will produce the water proof fabrics.
 We know about the flexural properties from which we get concept of
drape. We need the drape for shaping property of a fabric.
 Torsional properties gives us the idea about torsional rigidity and
torsional rigidity decreases the twisting result. As a result we can’t
give twist easily.
 Frictional properties give us the about breakage rate of yarns during
fabrication.
 We also know about the minimization the hairiness as much as
possible due to friction which causes unevenness and shade variation
in subsequent processes.
 Thermal properties give the idea about wearing fabrics in different
seasons like woolen fabrics are used in the Winter season and cotton
fabrics are used in the Summer season.
In fact we tell that from above points the relevancy of the textile physics in field of
engineering is that if we extract the fundamental properties from the fabric, must
need with those above ideas which are we get from textile physics knowledge. Again
if we control the process of our desired material, the knowledge of textile physics is
mandatory.