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| Titel: |
Pressure-sensitive 'Yarns' and In-rope Friction Measurements |
| Auteur: |
Hobbs, R. E. |
| Verschenen in: |
The journal of the Textile Institute |
| Paginering: | Jaargang 81 (1990) nr. 4 pagina's 549-560 |
| Jaar: |
1990 |
| Inhoud: |
This paper describes the development of a method for measuring pressures and friction within textile structures and its use on four ropes made from two different man-made fibres. The method employs a novel pressure-sensing 'yarn' element built (or pulled) into the rope and a separate measurement of the force needed to pull a short length of rope yarn out of the rope. The coefficient of friction is then simply found from the pull-out force divided by the pressure force acting on the surface area of the yarn. Two wire-rope-construction Kevlar ropes and two multirope polyester-fibre ropes were compared, at a variety of mean axial loads (1%, 5%, and 10% of the ultimate axial load), and on first loading as against the eleventh cycle of loading. By using built-in sensors, coefficients of friction were found to range from 0.10 to 0.14 for the Kevlar 960 and from 0.24 to 0.31 for the Kevlar 961 ropes, with variations at low loads. Because of technical difficulties with the pulled-in sensors used for the polyester-fibre ropes, the friction results for these ropes were unreliable. It is concluded that a built-in pressure-sensitive element is capable of producing valuable pressure and friction data that cannot be obtained by other means. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 11 van 14 gevonden artikelen
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