6.7 Strain Energy

When a wire is stretched, then the work done on the wire is stored in the form of internal P.E. of wire. The amount of stored P.E. per unit volume of wire is called strain energy.

Let a wire of length 'L' be stretched by the means of a force 'F' to the length (L + x); then work done by the force in stretching the wire further by length dx is

dW = Fdx

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Index

6.1 Definition of Elasticity
6.2 Types Of Deformations
6.3 Deforming and Restoring Forces
6.4 Strain and Stress
6.5 Hooke's Law
6.6 Elastic Modules
6.7 Strain Energy

Chapter 7