blob: 4b35b6c3a7ec66ca1616ac6948e5529f46b06da0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
-->//(Threaded Joints) Example 7.18
-->//Refer Fig.7.35 on page 256
-->//Maximum force acting on the assembly Pmax (kN)
-->Pmax = 10
Pmax =
10.
-->//Minimum force acting on the assembly Pmin (kN)
-->Pmin = 0
Pmin =
0.
-->//Yield tensile strength of 45C8 Syt (N/mm2)
-->Syt = 380
Syt =
380.
-->//Ultimate tensile strength of 45C8 Sut (N/mm2)
-->Sut = 630
Sut =
630.
-->//Young's modulus of the plain carbon steel E1 (N/mm2)
-->E1 = 207000
E1 =
207000.
-->//Young's modulus of aluminium E2 (N/mm2)
-->E2 = 71000
E2 =
71000.
-->//Fatigue stress concentration factor Kf
-->Kf = 2.2
Kf =
2.2
-->//Expected reliability (%)
-->reliability = 90
reliability =
90.
-->//Initial pre-load in the bolt Pi (kN)
-->Pi = 5
Pi =
5.
-->//Factor of safety fs
-->fs = 2
fs =
2.
-->//Length of the bolt l (mm)
-->l = 25 + 25
l =
50.
-->//Assume diameter of the bolt to be less than 7.5mm for Kb to be 1
-->d = 1
d =
1.
-->//As Ka is incorporated into Kf, assume the assembly to be ground
-->//This is just to obtain a random value of Ka
-->op = 1
op =
1.
Core cross-section area of the bolt(A) = 54.133961 mm2
|
