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You searched for subject:(steel wire rope). Showing records 1 – 3 of 3 total matches.

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Delft University of Technology

1. De Jong, B.C. Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :.

Degree: 2015, Delft University of Technology

Wire rope is used in numerous applications such as elevators, power lines, suspension bridges, ships and the mooring of offshore structures. In many of these applications wire rope needs to be bent. Currently the Norwegian certification instance Det Norske Veritas (DNV) prescribes a capacity reduction factor for bending wire rope. It is unclear how this formula is derived or what it is based on. Therefore the main question of this thesis is: How does the forced bending of a steel wire rope around a shackle affect the break load of the wire rope? A secondary research question is: How does the forced bending of a steel wire rope relate to the reduction factor for bending enforced by DNV? These questions are answered by constructing an analytical model. In addition experiments are performed at the laboratory of the civil engineering faculty to verify this model. The analytical model is based on the assumption that every single wire behaves as an Euler-Bernoulli beam. The reduction in capacity is dominated by the effect of individual wires being bent, similar to a bundle of loose beams being bent. Plastic deformation needs to be considered to accurately describe smaller D/d ratios. Due to the helix structure, axial tension causes friction forces to develop between the strands and the wires. This increases the stiffness of the wire rope and leads to higher stresses and strains when the wire rope is bent. As soon as the wires start slipping the stiffness lowers drastically and any further deformation causes a much lower increase in stress and strain. All experiments are performed on both a 14mm and a 20mm wire rope. First an experiment is carried out to verify the test set-up and obtain the break load of a straight steel wire rope. Then a second experiment is performed to find the break load of a bent wire rope under various D/d ratios. These two tests lead to a reduction factor for bending. The analytical model shows a good fit with the experimental results. From this it can be concluded that the model developed in this thesis is a promising way to model wire rope and leads to a fairly accurate answer for the capacity reduction due to bending. The model developed and the DNV formula show similar reduction factors. For very small D/d ratios the model predicts a 5% lower reduction, while at bigger D/d ratios a higher reduction factor is predicted. The experiments show a better match with the analytical model, but due to the small differences and large standard deviation a larger sample size would be necessary to confirm this. In addition to the main question a limited investigation was done on the bending stiffness of wire rope. With some additions to the model developed for capacity reduction it was possible to model the bending stiffness. The result is a stick slip model that defines the bending stiffness as a parameter of the axial tension and the curvature, this bending stiffness rapidly declines as the wire rope is bent and wires start slipping. Although this model is not experimentally validated, the fact… Advisors/Committee Members: Bijlaard, F.S.K., Hendriks, M.A.N., Abspoel, R., Breukels, J..

Subjects/Keywords: steel wire rope; bending

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APA (6th Edition):

De Jong, B. C. (2015). Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:3f302bbe-52a9-431b-88e8-82d9c8901e3c

Chicago Manual of Style (16th Edition):

De Jong, B C. “Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :.” 2015. Masters Thesis, Delft University of Technology. Accessed December 12, 2019. http://resolver.tudelft.nl/uuid:3f302bbe-52a9-431b-88e8-82d9c8901e3c.

MLA Handbook (7th Edition):

De Jong, B C. “Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :.” 2015. Web. 12 Dec 2019.

Vancouver:

De Jong BC. Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :. [Internet] [Masters thesis]. Delft University of Technology; 2015. [cited 2019 Dec 12]. Available from: http://resolver.tudelft.nl/uuid:3f302bbe-52a9-431b-88e8-82d9c8901e3c.

Council of Science Editors:

De Jong BC. Analytical and experimental analysis of the capacity of steel wire ropes subjected to forced bending :. [Masters Thesis]. Delft University of Technology; 2015. Available from: http://resolver.tudelft.nl/uuid:3f302bbe-52a9-431b-88e8-82d9c8901e3c


Brno University of Technology

2. Šťastná, Barbora. Vliv silničních záchytných systémů na počet a druh dopravních nehod .

Degree: 2013, Brno University of Technology

Cílem diplomové práce je provést rozbor typů silničních záchytných systémů, popis zkoušení silničních záchytných systémů a použití lanových svodidel v zahraničí a ČR. Dále je proveden rozbor stavu na rychlostní komunikaci R48 v úseku Nový Jičín – Příbor a posouzen z hlediska počtu a druhu dopravních nehod v souvislosti s lanovými svodidly.; The aim of the master´s thesis is to analyze the types of road restraint systems, a description of testing road restraint systems and the use of wire rope safety fence in the Czech Republic and abroad. In addition, there is an analysis on the highway of R48 in the section Nový Jičín – Příbor and assessed in terms of the number and type of accidents in connection with wire rope safety fence. Advisors/Committee Members: Pošvářová, Miloslava (advisor).

Subjects/Keywords: Silniční záchytný systém; lanové svodidlo; ocelové svodidlo; betonové svodidlo; zkoušení silničních záchytných systémů; dopravní nehoda; Road restraint system; wire rope safety fence; steel barrier; concrete barrier; testing road restraint system; traffic accident

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Šťastná, B. (2013). Vliv silničních záchytných systémů na počet a druh dopravních nehod . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/29861

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Šťastná, Barbora. “Vliv silničních záchytných systémů na počet a druh dopravních nehod .” 2013. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/29861.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Šťastná, Barbora. “Vliv silničních záchytných systémů na počet a druh dopravních nehod .” 2013. Web. 12 Dec 2019.

Vancouver:

Šťastná B. Vliv silničních záchytných systémů na počet a druh dopravních nehod . [Internet] [Thesis]. Brno University of Technology; 2013. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/29861.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Šťastná B. Vliv silničních záchytných systémů na počet a druh dopravních nehod . [Thesis]. Brno University of Technology; 2013. Available from: http://hdl.handle.net/11012/29861

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Brno University of Technology

3. Bádr, Miroslav. Návrh elektrického kladkostroje .

Degree: 2008, Brno University of Technology

Cílem práce bylo vytvořit technickou dokumentaci k elektricky poháněnému kladkostroji s ručně poháněným pojezdem. Zadány byly základní parametry jako nosnost, zdvih a rychlost zdvihu. Nejprve byl proveden výpočet zatížení čepů, pojezdových kol a volné kladky. Následně byl proveden výpočet pro správnou volbu lana, volné kladky, lanového bubnu a ložisek pro lanový buben. Po tomto výpočtu následoval výpočet pro správnou volbu elektromotoru a spojky. Dokumentace byla doplněna obrázky a tabulkami, které jsou umístěny u jednotlivých rozhodujících uzlu kladkostroje. K dokumentaci byl vytvořen jak výkres navrhovaného zařízení tak výkresy jednotlivých podsestav.; Purposes work was create technical documentation to an electrically driven tackle with actuated by hand undercarriage. Was booked up fundamental parameters like bearing, stroke and hoisting speed. First was effected calculation of load on pinion necks and an idle pulley. Subsequently was effected calculation for right election of a rope, an idle pulley, a rope drum and bearings for the rope drum. Up this calculation followed calculation for a right election of an electric motor and a shaft clutch. The documentation was complemented with pictures and tablets, that are seted near single decisive knots of the tackle. To the documentation was creationed how a suggested arrangement drawing so single subassemblies drawings. Advisors/Committee Members: Škopán, Miroslav (advisor).

Subjects/Keywords: kladkostroj; lanový buben; ručně poháněný pojezd; elektromotor; ocelové lano; hřídelová spojka; volná kladka; zdvih; rychlost; ohyb.; pulley block; rope drum; actuated by hand undercarriage; electric motor; steel-wire rope; shaft clutch; idle pulley; travel rise; speed; bend.

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Bádr, M. (2008). Návrh elektrického kladkostroje . (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/14571

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Bádr, Miroslav. “Návrh elektrického kladkostroje .” 2008. Thesis, Brno University of Technology. Accessed December 12, 2019. http://hdl.handle.net/11012/14571.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Bádr, Miroslav. “Návrh elektrického kladkostroje .” 2008. Web. 12 Dec 2019.

Vancouver:

Bádr M. Návrh elektrického kladkostroje . [Internet] [Thesis]. Brno University of Technology; 2008. [cited 2019 Dec 12]. Available from: http://hdl.handle.net/11012/14571.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Bádr M. Návrh elektrického kladkostroje . [Thesis]. Brno University of Technology; 2008. Available from: http://hdl.handle.net/11012/14571

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.