Question: Question 4 ( 2 0 Marks ) An aluminium bar ( E = 7 0 9 GPa ) of length 3 m is fully built

Question

4 (20

Marks

)

An aluminium bar

(E = 709

GPa

)

of length

3

m is fully built

-

in at each end and has a hollow square cross

-

section as shown in Figure

3 .

Calculate the effective slenderness ratio of the bar and hence determine if the Euler buckling equation is valid in this case. Assuming it is valid, what is the predicted Euler buckling load?

t = 3 m m

everywhere

Question 4 ( 2 0 Marks ) An aluminium bar ( E = 7

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