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-->//(Threaded Joints) Example 7.21
-->//Maximum internal pressure MAXP (MPa)
-->MAXP = 2
MAXP =
2.
-->//Minimum internal pressure MINP (MPa)
-->MINP = 0
MINP =
0.
-->//Diameter of the circle on which pressure acts D (mm)
-->D = 400
D =
400.
-->//Assume the stiffness of the bolts to be 1N/mm kb
-->kb = 1
kb =
1.
-->//Calculate the stiffness of the parts kc (N/mm)
-->kc = 4 * kb
kc =
4.
-->//Ultimate tensile strength Sut (N/mm2)
-->Sut = 900
Sut =
900.
-->//Yield strength Syt (N/mm2)
-->Syt = 700
Syt =
700.
-->//Endurance limit in bending Sdash (N/mm2)
-->Sdash = 300
Sdash =
300.
-->//Fatigue stress concentration factor Kf
-->Kf = 2.2
Kf =
2.2
-->//Factor of safety fs
-->fs = 1.5
fs =
1.5
-->//Number of bolts N
-->N = 8
N =
8.
-->//Assume expected reliability (%)
-->reliability = 90
reliability =
90.
-->//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) = 85.172067 mm2
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