ABCDEFGHIJKLMNOPQRSTUVWXYZAAABACADAEAFAGAHAI
1
Purpose of calculation:
areaforceinertialengthstress
2
Calculate stress in a 'angle' tension fitting.
Metricmm2Nmm4mmMPa
3
USin2lbsin4inlbs/in2
4
Calculation Reference
5
UK railway industry method (the British Rail "Brown Book" method).
6
Note requires XlXtrFun addin (interp function).
7
Calculation Validation
8
Independent verification is required.
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Units=
1
29
30
Input values
31
Geometry
32
w =
19,2
mm
33
h =15
mm
34
t =3
mm
35
e =10
mm
36
c =20
mm
37
j =20
mm
38
i =6
mm
39
Loads
40
P =3000N
41
Calculated Geometry
42
r =12
mm
#NAME?
43
a =10,88619811
mm
#NAME?
44
d =-9,113801893
mm
#NAME?
45
k =9
mm
#NAME?
Note: this is true for standard bolt sizes
46
Stress in the wall
47
Section AA
48
A =102,6
mm2
#NAME?e/tZ
49
10,39
50
Second moment of area
20,55
51
I =3870,647454
mm4
#NAME?30,68
52
40,76
53
Distance from neutral axis to extreme fibre
50,815
54
v =6,930368961
mm
#NAME?60,845
55
70,87
56
Direct stress in the wall
80,88
57
σdw =
#NAME?
MPa
#NAME?
58
(a-d)/ki/a = 0.1i/a = 0.2i/a = 0.3i/a = 0.4
59
Maximum tensile bending stress in the wall
10000
60
σbw =
#NAME?
MPa
#NAME?1,51,321,351,41,52
61
22,12,22,32,5
62
Total stress
2,52,752,8533,25
63
σt =
#NAME?
MPa
#NAME?33,23,33,53,8
64
65
Stress in the end pad
66
(e/t)=
3,333333333#NAME?
67
Z is a factor read off from graph - a 'best fit' polynomial curve is used in place of graph.
68
Z =0,7083703704#NAME?
69
70
{(a-d)/k}=
#NAME?#NAME?
71
72
K is a factor read off from graph of 4 curves - 4 'best fit' polynomial curves are used in place of graph.
73
k0.1 =
#NAME?#NAME?0,1
74
k0.2 =
#NAME?#NAME?0,2
75
K0.3 =
#NAME?#NAME?0,3
76
k0.4 =
#NAME?#NAME?0,4
77
78
(i/a)=
0,5511566059#NAME?
79
K =#NAME?#NAME?
Note interp is a XlXtrFun addin function
80
81
Bending stress at bolt head position.
82
σbp =
#NAME?
MPa
#NAME?
83
84
Maximum shear stress at bolt head position
85
τp =
#NAME?
MPa
#NAME?
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100