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Structural Engineering and Mechanics
  Volume 4, Number 3, May 1996, pages 313-329
DOI: http://dx.doi.org/10.12989/sem.1996.4.3.313
 


Extension of a cable in the presence of dry friction
Huang XL, Vinogradov OG

 
Abstract
    A mathematical model of a cable as a system of interacting wires with interwire friction taken into account is presented in this paper. The effect of friction forces and the interwire slip on the mechanical properties of tension cables is investigated. it is shown that the slip occurs due to the twisting and bending deformations of wires, and it occurs in the form of micro-slips at the contact patches and macro-slips along the cable. The latter slipping starts near the terminals and propagates towards the middle of the cable with the increase of tension, and its propagation is proportional to the load. As the result of dry friction, the load-elongation characteristics of the cable become quadratic. The energy losses during the extension are shown to be proportional to the cube of the load and in inverse proportion to the friction force, a result qualitatively similar to that for lap joints. Presented examples show that the model is in qualitative agreement with the known experimental data.
 
Key Words
    cable mechanics, energy losses, interwire friction
 
Address
Huang XL, WITTKE WASTE EQUIPMENT,MEDICINE HAT,AB T1C 1K6,CANADA
UNIV CALGARY,DEPT MECH ENGN,CALGARY,AB T2N 1N4,CANADA
 

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