Explanation:
Minimum Proof strength (sp) = 120 kpi
minimum tensile strength (sat) = 150 kpi
Now, calculate the load per each using the equation
[tex]p=\frac{80}{N} \mathrm{ki}[/tex]
calculate the preload for non permanent connection
[tex]F=0.75 \mathrm{sp} \mathrm{At}[/tex]
[tex]F=0.75 \times 120 \times 0.1419[/tex]
[tex]F=2.77 kip[/tex]
Calculate the stiffness constant for the assenbly
[tex]c=\frac{k p}{k_{p}+k_{m}}[/tex]
Substitute
[tex]c=\frac{4 \times 10^{6}}{\left(4 \times 10^{6}\right)+\left(12 \times 10^{6}\right)}[/tex]
c=0.25