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Study of the influence of nanoparticles on the performance and the properties of polyamide 6

von Dr. Mohammad Reza Sarbandi

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[1.] Mrs/Fragment 075 01 - Diskussion
Zuletzt bearbeitet: 2015-04-19 19:16:21 WiseWoman
BauernOpfer, Fragment, Gesichtet, Kothari 1997, Mrs, SMWFragment, Schutzlevel sysop

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Hindemith
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Quelle: Kothari 1997
Seite(n): 251 ff., Zeilen: 251: last lines; 252: 1 ff.
5.7. Tensile properties

Tensile properties of textile materials are measured using machines designed to impart, or transmit, force/extension to the material and measure the response of the material to the applied action. Tensile testing machine for textile materials are classified according to their operating principle as (1) Constant rate of extension (CRE), (2) Constant rate of traverse (CRT), (3) Constant rate of loading (CRL). Most fibers and filament yarn testers employ constant rate of extension (CRE) as the straining principle because there are difficulties in extension measurement on constant rate of loading (CRL) testers due to creep and the accuracy achieved using constant rate of traverse (CRT) testers is much lower than that achieved with other types of tester. The load-elongation characteristic curve obtained on CRE testers provide important information about the relationship between force and elongation during the time up to the fiber rupture and can be uses to determine a number of important tensile test parameters [44].

The following parameters are determined with reference to tensile tester equipment:

- Breaking load- the peak load that is reached during a tensile test (units: N, cN, mN).

- Elongation at break – the elongation at breaking load expressed as percentage of the original length (unit: %).

- Tenacity – the breaking load per unit linear density of the unstrained specimen (units: Ntex-1, cN tex-1, cN dtex-1).

- Modulus of elasticity or Young’s modulus – the slope of the stress-strain curve in the elastic region between the origin and the yield point. (units: Ntex-1, cN tex-1, cN dtex-1).

- Work of rupture – the work done from the point of pretensional load to the point of breaking load. The energy required to bring a specimen to the breaking load can be obtained from the area under the load-elongation curve. Work of rupture is dependent on the linear density and length of specimen (units: N m, cN m)


[44] V.B.Gupta and V.K.Kothart , Manufactured fiber technology, 1997 Chapman and Hall

11.4 TENSILE PROPERTIES

Tensile properties of textile materials are measured using machines designed to impart, or transmit, force/extension to the material and measure the response of the material to the applied action. Tensile testing machines for textile materials are classiFied according to their operating principle as follows [3].

Type Principle of operation

CRE Constant rate of extension

CRT Constant rate of traverse (pendulum type)

CRL Constant rate of loading (inclined plane type)

[page 252]

Most fibre and filament yam testers employ constant rate of extension (CRE) as the straining principle because there are difficulties in extension measurement on constant rate of loading (CRL) testers due to creep and the accuracy achieved using constant rate of traverse (CRT) testers is much lower than that achieved with other types of tester. The load-elongation characteristic curves (LE characteristic curves) obtained on CRE testers provide important information about the relationship between force and elongation during the time up to the fibre/yarn rupture and can be used to determine a number of important tensile test parameters.

11.4.1 TERMS AND DEFINITIONS

Figure 11.1 shows a typical load-elongation curve for a fibre. The following parameters are determined with reference to this curve:

• Breaking load (or force) - the peak load (or force) that is reached during a tensile test (units: N, cN, mN).

[...]

• Breaking extension - the elongation at breaking load expressed as a percentage of the original length (unit: %).

[page 253]

• Tenacity - the breaking load per unit linear density of the unstrained specimen (units: N tex-1, cN tex-1, cN dtex-1).

[...]

• Modulus of elasticity or Young's modulus - the slope of the stress-strain curve in the elastic region between the origin and the yield point. It is calculated from the slope of the load-elongation curve at the midpoint of the elongation in the elastic region (units: Ntex-1, cNtex-1, cN dtex-1).

• Work of rupture - the work done from the point of pretensional load to the point of breaking load. The energy required to bring a specimen to the breaking load can be obtained from the area under the load- elongation curve. Work of rupture is dependent on the linear density and length of the specimen (units: N m, cN cm).


[...]

Anmerkungen

The source is mentioned, but it does not become clear that the entire page is taken from it.

Sichter
(Hindemith), SleepyHollow02


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