(Solved): A stainless-steel bar and an aluminium bar are held between two rigid support ...

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A stainless-steel bar and an aluminium bar are held between two rigid supports as shown in figure 1a. The temperature is raised by $$120^{?}\mathrm{C}$$. a) Determine the normal stress in the aluminium bar. b) Determine the elongation of the stainless-steel bar. Figure 1a For the Aluminium bar: Cross-sectional area $$=1300{\mathrm{mm}}^2$$ $$\mathrm{E}=75\mathrm{GPa}$$ Coefficient of thermal expansion $$(a)=23\times 10^{?6}{\left({}^{?}\mathrm{C}\right)}^{?1}$$ For the Stainless-steel bar: Cross-sectional area $$=500{\mathrm{mm}}^2$$ $$E=190\mathrm{GPa}$$ Coefficient of thermal expansion $$(\mathrm{a})=17.3\times 10^{?6}{\left({}^{?}\mathrm{C}\right)}^{?1}$$ A beam is subjected to a maximum bending moment of $$M=650\mathrm{kNm}$$. The cross section of the beam is shown in Figure $$1\mathrm{b}$$. a) Determine the distance to the neutral axis from the bottom face. b) Determine the moment of inertia of the cross section about the neutral axis. c) Determine the maximum bending stress in the beam.