Fibre strength measurement
Bundle strength
Pressley fibre bundle strength tester
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Pressley fibre bundle strength tester |
Pressley fibre tester is used to measure the bundle tensile strength of natural fibres.
Pressley strength tester is measuring the bundle strength of fibres with the help of the inclined plane apparatus principle.
This instrument includes 1 pair of clamps, a spacer, a torque vice, a wrench, a cutter, a comb, and tweezers.
A 5 mg x 0.01 mg capacity balance is required to measure weight.
In modern days, due to some limitations like lesser efficiency and results variation Or due to servicing factors, this instrument is rarely used.
Stelometer
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Stelometer |
In this instrument, there is a special dashpot device, which is measured the rotation of the pendulum axis or beam.
Dashpot is arranged and moves in such a way that the rate of loading is approximately constant during its movement. (That will allow one parameter of strength testing constantly throughout the test.)
This rate of loading is adjusted at 1 kg/sec by special arrangement. (It is standard for this test.)
A pointer, freely mounted on the axis and driven by a sensing pin that is mounted on the pendulum, moves over a scale graduated from 2 to 7 kg.
This numbering shows the breaking load. (For more accuracy, a smaller pointer is dedicated to the percentage of elongation on a secondary scale.)
The indicators can be read to the nearest 0.01 kg for breaking load and 0.1 per cent for elongation of specimen.
The clamps, after removal of the protruding fibres, are loaded in the slots on the top of the Stelometer and the beam is released.
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Stealometer working |
Stelometer value = Breaking strength of bundle (in kg.) * 11.81 / Weight of bundle (in mg.)
Stelometer value at 1/8 inch gauge length
Stelometer value = Breaking strength of bundle (in kg.) * 15 / Weight of bundle (in mg.)
- How strength is measured?
- What is a single fibre test?
- What is the universal test?
- How universal tensile tester works?
References
Cenote, M. (2015). Google Books. In The SAGE Guide to Key Issues in Mass Media Ethics and Law (pp. 847–858). SAGE Publications, Inc.
Fundamental textile testing: Mechanical and Physical Tests. (n.d.). Fundamental Textile Testing: Mechanical and Physical Tests. from https://www.eurofins.com/textile-leather/articles/fundamental-textile-testing-mechanical-and-physical-tests/
Handbook of textile testing and quality control - Google search. (n.d.). G.Co. from https://g.co/kgs/RvVMgm
NPTEL IIT. (n.d.). Note.Ac.In. from https://nptel.ac.in/courses/116102029
Elsevier. (2016). Performance testing of textiles (1st ed.). Woodhead Publishing.
Houck, M. M. (2009). Identification of Textile Fibers (M. M. Houck, Ed.; 1st ed.). Woodhead Publishing.
Textile School. (2010, October 27). Fibre Identification - tests to identify a fibre. Textile School. https://www.textileschool.com/321/fiber-identification-tests-to-identify-a-fibre/
Trivedi, Y. (2020, April 10). Identification of Textile Fibers. Textilesphere.com. https://www.textilesphere.com/2020/04/identification-of-textile-fibers.html
(N.d.). Textilelearner.net. from https://textilelearner.net/classification
Writer - DSPAT Team