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19. A copper rod of 30mm diameter and 400mmm is enclosed in a steel tube of internal diameter 30mm and thickness 10mm and are rigidly

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19. A copper rod of 30mm diameter and 400mmm is enclosed in a steel tube of internal diameter 30mm and thickness 10mm and are rigidly attached to act as a composite bar. The bar is subjected to axial load of 200kN (tensile). Find a) stresses in each material b) loads shared by each material c) Elongation of the composite. Take Es=200Gpa and Ec=100GPa

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