A cylindrical structural element is made of steel. The element must withstand an axial load of 160 kN. Determine the diameter of its cross section so that it does not have plastic deformation. What is the load that this element resists if it is 80 cm long and suffers an elongation of 200 micrometers? Consider an elastic modulus of 200 G Pa. And a yield stress of 340 M Pa. Use a factor of safety of 3/5 with respect to the yield stress.

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Strain energy

The term strain indicates the variation in an object's length, area, and volume when the object is subjected to an external force. The external force may be of normal, shear, moment, torque, etc. The strain in an object depends on the types of external force and cross-section of the object. Mathematically, the evaluation of strain can be obtained with the help of elastic constants.