Wire Ropes Under Tensile Load - Wire Ropes: Tension, Endurance, Reliability - page 96

Fig. 2.16 Test situation for
the measurement of rope
damping, Wehking et al.
( 1999 )

crane

clamp

aluminium
pressed sleeve

wire rope

inductive
elongation meter

amplifier

main mass M

dropping mass M A

buffer

metallic cross section of the wire rope A = 45.1 mm 2 , the middle rope tensile
stresses for both of the main masses M = 400 and 2,000 kg are

r m ¼ 400 9 : 81
45 : 1

r m ¼ 2 ; 000 9 : 81
45 : 1

¼ 87 N/mm 2 ¼ 435 N/mm 2 :

and

Using ( 2.50 ) and ( 2.52 ), the rope elasticity module of the Warrington rope is

E S ð 87 r a Þ ¼83 ; 000 N/mm 2 E S ð 435 r a Þ ¼125 ; 000 N/mm 2 : and

Or alternative, by interpolation for the 6-strand rope from Table 2.3 and DE
from Table 2.4 , the rope elasticity module E S is approximately

E S ð 87 r a Þ ¼E S ð 40; 40 Þþð E S ð 100; 100 Þ E S ð 40; 40 ÞÞ 87 40

100 40 þ DE

E S ð 87 r a Þ ¼77 þð 98 77 Þ 47 kN/mm 2

60 11 ¼ 82

and