What are main factors affecting the tensile behavior of a yarn?
The experimental design involved four main factors affecting the yarn tensile behavior, namely twist, fineness, loading rate and specimen length.
What are the factors that affect tensile properties?
Type of aggregate. The aggregate has an influence on the tensile strength of concrete for three reasons: the surface texture, the shape, and the strength. When the surface is rough, the bond between aggregate and matrix is stronger.
What are main factors affecting the tensile behavior of a fabric?
Factors affecting the tensile properties of textiles:
- Test specimen length.
- The capacity of the machine.
- The effect of humidity and temperature.
- The previous history of the specimen.
- The form of the test specimen.
- The time of loading and the time to break the specimen.
- Test Specimen length:
What factors determine the strength of spun yarns?
It has been known for many years that the strength of a spun yarn depends on the two important testing parameters, namely, the gauge length and rate of extension. There is no doubt that all studies relating to the influence of gauge length and extension rate on yarn strength are invaluable both in theory and practice.
What are the factors affecting yarn strength?
Factors that affect yarn strength are as follows –
- Staple length. Longer staple cotton gives higher strength and this is true even in the case of synthetic staple fibre such as nylon and terylene. …
- Fibre fineness. …
- Fibre strength. …
- Twist. …
- Evenness. …
- Fibre length variation and distribution. …
- Fibre finish. …
- General factors.
What increases the strength of yarn?
The higher the air temperature of the environment, the lower the yarn strength; The higher the relative air humidity, the higher the moisture regain of the yarn. This results in the increase in the strengths of cotton and ramie yarn and the decrease in strengths of woolen and synthetic(or artificial) fiber yarns.
Which of the following factors do not affect tensile testing?
Which of the following does not affect the value of ultimate tensile strength? Explanation: The length of the specimen does not affect the value of ultimate tensile strength. While the quality of surface finish, speed of testing, dimensional accuracy of the specimen affect the value of ultimate tensile strength.
What factors decrease tensile strength?
Explanation: Tensile strength increases with the molecular weight of material. It is due to the effect of entanglement. Other factors temperature, purity and grain size, on increasing, cause in decreasing UTS.
What affects yield strength?
The yield strength of a metal or alloy is affected by following factors: (i) Strain hardening. … (iii) Temperature of metal and microstructure. (iv) Hydrostatic pressure.
What is breaking length in textile?
Breaking length: The length of the specimen which will just break under its own wt. when hung vertically is called breaking length. Breaking length is an older measure of tenacity. It is usually measured in kilometers. E.g. 10 tex yarn breaks at a load of 150 grams.
How does tensile property affect textile materials?
Tensile strength is very important property of textile materials which represents the ratio between force required to break a specimen and cross-sectional area of that specimen.
How do you calculate textile production?
24. Production Calculation of Yarn singeing machine: Length = Count * Weight = Count * Weight * 840 yards = (Count * Weight * 840) / rpm yards per minute = (Count * Weight * 840) / rpm * 60 * 8 * 3 yards per day = (Count * Weight * 840) / rpm * 60 * 8 * 3 * 0.914 =…… X…meter/day.
What are the characteristics of a spun yarn?
Spun yarns are hairy while filament yarns are smooth. Spun yarns are less lustrous and generally softer in terms of handle than filament yarns. They tend not to slip as much as filament yarns and do not tend to snag as much. Spun yarns do, however, tend to pill more than filament yarns.
Which yarn have the higher strength?
Vectran fiber exhibits exceptional strength and rigidity. Pound for pound Vectran fiber is five times stronger than steel and ten times stronger than aluminum.
Is cotton spun or filament?
The most common plant fiber is cotton, which is typically spun into fine yarn for mechanical weaving or knitting into cloth. Cotton and Polyester are the most commonly spun fibers in the world. Cotton is grown throughout the world. … Synthetic fibers come in three basic forms: staple, tow, and filament.