The steel rod ABC is made of a steel for which the yield strength is y = 250 MPa and the modulus of elasticity is E = 200 GPa. Determine, for the loading shown, the maximum strain energy that can be acquired by the rod without causing any permanent deformation.

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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.