Tensile Properties of Textile fiber and textile Material

Tensile Properties of Textile fiber and textile Material

Tensile Properties of Textile fiber and textile Material : Textile Fibers usually experience tensile loads whether they are used for apparel or technical structures. Their form, which is long and fine, makes them some of the strongest materials available as well as very flexible. This book provides a concise and authoritative overview of tensile behavior of a wide range of both natural and synthetic fibers used both in textiles and high performance materials.

 

Tensile Properties of Textile Material

  1. Tenacity
  2. Breaking extension
  3. Work of rupture
  4. Initial modulus
  5. Work factor
  6. Work recovery
  7. Elastic recovery
  8. Yield stress
  9. Yield strain
  10. Yield point
  11. Breaking load
  12. Creep

 

Explanation of each is given below:

 

  1. Tenacity:

The ratio of load obligatory to break the specimen and the linear density of that specimen is known as  tenacity. Statistically, Tenacity = Required Load to break the specimen / Linear density of the specimen Unit: gm/denier, gm/Tex, N/Tex, CN/Tex etc.

 

  1. Breaking extension:

The elongation essential to break a textile material is a valuable measure. It may be stated that the actual percentage increase in length and is named as breaking extension. Statistically, Breaking extension (%) = (Elongation at break / Original length) × 100%

 

  1. Work of rupture:

Work of rupture is well-defined as the energy essential to break a material or total work done to break that material. Unit: Joule (J)

 

  1. Initial modulus:

The tangent of angle amongst the initial curve and the horizontal axis is equivalent to the ratio of stress and strain.

In engineering science the ratio is named as Young’s Modulus and in textile we use the terms as Initial Young’s Modulus.

Initial modulus, tan α = stress / strain Tan α ↑↓ → extension ↓↑

 

Tensile Properties of Textile fiber and textile Material

Tensile Properties of Textile fiber and textile Material

 

 

  1. Work factor:

The ratio amongst work of rupture and the product of breaking load and breaking elongation is known as work factor. Work factor = work of rupture / (breaking load × breaking elongation)

 

  1. Work recovery:

The ratio between work returned for the period of recovery and total work done in total extension is known as work recovery.

 

Total extension = Elastic extension + Plastic extension

Total work = work required to elastic extension + work required to plastic extension.

 

  1. Elastic recovery:

The power of recovery from a specified extension is known as elastic recovery. Elastic recovery depends on kinds of extension, fiber structure, types of molecular bonding and crystalline of fiber. The power of recovery from a given extension is known as  elastic recovery. Elastic recovery depends on sorts of extension, fiber structure, types of molecular bonding and crystalline of fiber.

 

  1. Yield point

The point up to which a fiber acts elastic distortion and after which a fiber shows plastic deformation is known as  yield point.

 

  1. Yield stress

The stress at yield point is known as yield stress.

 

  1. Yield strains:

The strain at yield point is known as yield strain.

 

  1. Breaking load:

The  load  which is compulsory to break a specimen is known as breaking load.

 

  1. Creep:

When a load is applied on the textile material an prompt strain is happened, but after that the strain will be lower with the passing time. This behavior of the material is named as creep.

 

 

There are two types of creep:

  1. Temporary creep
  2. Permanent creep

 

Tensile Properties of Textile fiber and textile Material

Tensile Properties of Textile fiber and textile Material

Here,

AB = the initial length of the specimen

AD = the final length after recovery

BD = the total extension

CD = the elastic extension

BC = the plastic extension

 

Total extension = Elastic extension + Plastic extension

So, Elastic recovery (%) = (Elastic extension/total extension) ×100% = (CD/BD) × 100%

So, Plastic recovery = (plastic extension/total extension) ×100% = (BC/BD) ×100%

 

 

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