Strength of Material – I MDU Question Paper December 2004
October 10th, 2009
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1. Three vertical wires in the same place are suspended from a horizontal support. They are all of the same length and carry a load by means of a rigid cross bar at their lower ends. One of the wires is of copper and the two other are of steel. The load is increased and temperature changed so that the stress in each wire is increased by 10 N/mm2. Find the change of temperature. Es =205,000 N/mm2, Ec = 102,000 N/mm2, αs = 11 x 10-6/oC, αc = 18 x 10-6/oC.