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Dushime Cissy,
posted 2 months 3 weeks ago.

A steel bar 300mm long , 24mm diameter is turned down to 18mm for 1/3 of its length, then heated to 30 degrees Celsius, clamped at both ends and allowed to cool, distance is unchanged find maximum stress in bar,temp coefficient =12.5*10 degrees Celsius, E=200GN/m square