Civil Engineering Reference
In-Depth Information
Fig. 3.45 Number of
bending cycles of a wire rope
with or without re-lubrication
Feyrer (
1981
)
99
Warr. 8
×
19 - SFC - sZ
bright, R
0
= 1570 N/mm
2
d = 16 mm
D/d = 25
steel
r = 0.53 d
S = 30kN
D
90
mineral oil, viscosity
1370 - 1520 mm
2
/s (40
°
C)
80
70
60
50
40
30
20
lubrication
before
test
lubrication
before and
during test
10
1
6
10
5
789
2
number of bending cycles N
3456 8
56
10
7,0
5,0
D/d
10
25
63
ropes FC-sZ
ropes WRC-sZ
3,0
N
m
2,0
N
90
1,0
0,7
0,5
N
m
N
50
N
m
N
10
0,3
23 57
10
5
10
6
2
number of bending cycles N
357
234
Fig. 3.46 Ratio of the breaking numbers of bending cycles N
m
/N with (index m) and without
re-lubrication, Feyrer (
1998
)
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