QUESTION $5$

A high strength steel bolt is

fitted inside aluminium and

brass tubes, as shown in the

figure. After the nut has

been fitted snugly, it is

tightened one$-$quarter of a

full turn that exerted an axial

load F on the tubes.

Determine the stress in each

tube.

Data:

$E_{\text{b}\text{r}\text{a}\text{s}\text{s}}=n{10}^{11}Pa,A_{\text{b}\text{r}\text{a}\text{s}\text{s}}=n30m{m}^2$

$E_{al}=\frac{n}{2\mathrm{.}9}{10}^{11}Pa,A_{al}=n20m{m}^2$

$F=n7500N,L_1=n100$mm

n$=0$