Wire Ropes Under Tensile Load - Wire Ropes: Tension, Endurance, Reliability - page 153

Table 2.10 Constants a i for the number of load cycles of stranded wire ropes for ( 2.102 ), metal sockets

Reference Wire ropes Nominal

diameter
d

Nominal
strength
R o

Test
frequenzy

Free
rope
length

Number
of tests

Constants Standard

deviation

N for d = 16
mm, S u /
d 2 = 20, 2S a /
d 2 = 200 N/
mm 2

N/mm 2

mm Hz L/d n a 0 a 1 a 2 a 3 a 4 lg s

Müller
( 1962 ,
1963 ,
1966 )

Cross lay ropes
6 9 19—
NSC—sZ

2.5 2,160 4.7 320 1/1 Lubricated

3.2 1,570 4.7 280 5/3

5.0 1,770 4.2 190 4/5 14.03 -3.461 - - -1.021 0.393 68,200

8.5 1,570 4.2 110 6/7 Unlubricated

16 1,570 3.0 65 7/6 12.82 -3.215 - - -0.718 0.385 35,800

3.0 b 6/6 c

28 1,570 27

Müller
( 1962 ,
1963 ,
1966 )

Cross lay ropes
6 9 19—
NFC—zZ

2.5 2,160 4.7 320 1/1 Unlubricated

3.2 1,570 4.7 280 3/3

5.0 1,770 4.2 190 5/5 12.74 -3.205 - - -0.535 0.178 52,700

8.5 1,570 4.2 110 5/6 Unlubricated

16 1,570 3.0 40 4/6 13.08 -3.245 - - -0.821 0.341 42,200

3.0 b 7/6 c 28 1,570 27

Filler a
6 9 19—
NSC—zZ

Müller
( 1962 ,
1963 ,
1966 )

Lubricated

16 1,570 3.0 50 2/2 18.740 -5.729 - - - - 381,000

2/2 c Unlubricated

15.324 -4.470 - - - - 109,000

Seale a
6 9 19—
NSC—sZ
lubricated

Müller
( 1962 ,
1963 ,
1966 )

16 1,570 3.0 50 5 16.055 -4.680 - - - 0.021 193,000

Filler a
8 9 19—
NSC—sZ
lubricated

Müller
( 1962 ,
1963 ,
1966 )

16 1,570 3.0 50 5 16.891 -5.476 - - - 0.055 136,000