29. Define "strain energy" and give equation for the same using terms of stress (o) and Young's modulus (E)
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The strain energy per unit volume is known as strain energy density and the area under the stress-strain curve towards the point of deformation. When the applied force is released, the whole system returns to its original shape. It is usually denoted by U. The strain energy formula is given as, U = Fδ / 2.
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In a molecule, strain energy is released when the constituent atoms are allowed to rearrange themselves in a chemical reaction. The external work done on an elastic member in causing it to distort from its unstressed state is transformed into strain energy which is a form of potential energy
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