Task 2 A plastic bar ACB having two different solid circular cross sections is held between rigid supports as shown in the figure. The diameters in the left- and right-hand parts are 50 mm and 75 mm,...

Extracted text: Task 2 A plastic bar ACB having two different solid circular cross sections is held between rigid supports as shown in the figure. The diameters in the left- and right-hand parts are 50 mm and 75 mm, respectively. The corresponding lengths are 225 mm and 300 mm. Also, the modulus of elasticity E is 6.0 GPa, and the coefficient of thermal expansion a is 100 x 106/° C. The bar is subjected to a uniform temperature increase of 40° C. Calculate the following quantities (a) The compressive force P in the bar. (b) The maximum compressive stress oc. (c) The displacement d c of point C. |4 [50 mm C 75 mm B -225 mm- -300 mm