The L2 steel bolt as shown in Figure Q4 has a diameter of 5 mm, and the link AB which is made from stainless steel 304 has a rectangular cross section that is 14 mm wide by 4 mm thick. The bolt is tightened so that it has a tension of 1750 N. Neglect the hole in the link. The modulus of elasticity are, EL2 = 200 GPa and E304 = 193 GPa. (a) Determine the strain energy in the link AB due to bending.  (b) Determine the strain energy in the bolt due to axial load.

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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.