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-->//(Threaded Joints) Example 7.19
-->//Maximum external force Pmax (kN)
-->Pmax = 10
Pmax =
10.
-->//Minimum external force Pmin (kN)
-->Pmin = 0
Pmin =
0.
-->//Assume the stiffness of the bolts to be 1N/mm kb
-->kb = 1
kb =
1.
-->//Calculate the stiffness of the parts kc
-->kc = 3 * kb
kc =
3.
-->//Overload percentage load (%)
-->load = 50
load =
50.
-->//Yield tensile strength of 50C4 Syt (N/mm2)
-->Syt = 460
Syt =
460.
-->//Ultimate tensile strength of 50C4 Sut (N/mm2)
-->Sut = 660
Sut =
660.
-->//Fatigue stress concentration factor Kf
-->Kf = 2.2
Kf =
2.2
-->//Expected reliability (%)
-->reliability = 90
reliability =
90.
-->//Factor of safety fs
-->fs = 2
fs =
2.
-->//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) = 39.413787 mm2
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