Question

Composite system is made of steel rod \(A D\), aluminium rod \(C F\) and copper rod \(B E\) which have square cross section with edge lengths of a \(_{\text {sT }}\) a \(a_{A}\) and a \(\mathrm{Cu}\) respectively. Copper rod \(\mathrm{BE}\) and aluminium rod \(\mathrm{CF}\) is perfectly bonded to steel rod \(\mathrm{AD}\) at points \(\mathrm{B}\) and \(\mathrm{C}\). If the system is built when the temperature is \(\mathrm{T}_{0}\) what \(1 / C^{\circ}, a_{C u}=1710^{6} 1 / C^{\circ}, a_{s t}=199 \mathrm{~mm}, a_{N}=96.2 \mathrm{~mm}, a_{C u}=63.2 \mathrm{~mm}, L_{1}=1.22 \mathrm{~m}_{n} L_{2}=1.77 \mathrm{~m}_{0}, L_{3}=0.8 \mathrm{~m}_{2}, L_{4}=1.82 \mathrm{~m}, L_{s}=0.3 \mathrm{~m}, T_{0}=2.4 C^{\circ}, T_{f}=18 C^{\circ} .\)

Answer 1