[Solved] A copper rod 15 mm diameter 0.8 m long is heated through 50?C. The expansion of the rod is prevented by gripping it at both ends. When the grips do not yield, the stress in rod is 115 N/mm2 and forces applied at the grips are 20 kN. In case one of the grip yields by 0.5 mm

Q.	A copper rod 15 mm diameter 0.8 m long is heated through 50?C. The expansion of the rod is prevented by gripping it at both ends. When the grips do not yield, the stress in rod is 115 N/mm2 and forces applied at the grips are 20 kN. In case one of the grip yields by 0.5 mm
A.	the rod will be under tension
B.	the force at grips will be increase
C.	the compressive stress in the rod will increase
D.	the compressive stress in the rod will reduce
E.	None of the above
Answer» D. the compressive stress in the rod will reduce

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