A solid steel bar 250 mm long is 10 mm square over part of its length, the remainder being circular with a diameter of 25 mm. A gradually applied tensile load P kN induces maximum stress in the bar of 200 MPa. The total strain energy in the bar when this stress of 200 MPa  is acting is 1,3 Joule. Take E = 200 GPa   Calculate : The load The length of the square portion of the bar The load that falls from a height of 8 mm and induces 1,3 Joules in the bar

A solid steel bar 250 mm long is 10 mm square over part of its length, the remainder being circular with a diameter of 25 mm. A gradually applied tensile load P kN induces maximum stress in the bar of 200 MPa. The total strain energy in the bar when this stress of 200 MPa  is acting is 1,3 Joule.

Take E = 200 GPa   Calculate :

1. The load
2. The length of the square portion of the bar
3. The load that falls from a height of 8 mm and induces 1,3 Joules in the bar