Two horizontal bars ABC and DEF are rigid and originally horizontal and the links CE and DG are 1/4 inch diameter steel rods. All the pin joints are frictionless. If a force of 5000 lbs is applied at B, find the vertical displacement of the pins at C,E and D. (Esteel = 30 x 10^3 ksi). G 2 E F -5.4- -1.4- 2 A В 4 4 5000 lb

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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.