NOMENCLATURE 



A Cross-sectional area of load-bearing wire 



B Binormal force in wire (lb) 



C Axial compression force (lb) 



E Young's modulus of elasticity of wire material (psi) 



F External axial force (lb) 



F Critical tension for kinking (lb) 

 c 



F £ Euler compression (tt/L) 2 EI (lb) 



4 



I Moment of inertia about cable diameter (in. ) 



4 



I Polar moment of inertia (in. ) 

 P 



L Length of the strand or cable (in.) 



AL Cable elongation (in.) 



M, Wire bending moment from curvature change (in. -lb) 



M Wire bending moment component in the normal direction (in. -lb) 



M Wire axial torque from end torsion (in. -lb) 



m Number of wires in a layer or number of strands in a layer 



N Normal tension component (lb) 



n Pitch number 



R Helix radius (in.) 



R Minimum helix radius of a wire (in.) 



m 



r Radius of wire cross section (in.) 



P Pitch length of wire or strand (in.) 



p Axial tension in wire (lb) 



S Arc length of load-bearing wire (in.) 



T External axial torque (in. -lb) 



T Critical torque for kinking (lb) 



18 



