# Strength of Materials/Axial Deformation of Bars

## Examples edit

The analysis presented in this section is valid when the length of the object under analysis, say *L*, is much larger than other dimensions and when the applied load is in the direction of *L*. An example of such a case is a pin jointed truss. When a load is applied to a truss, its members carry compressive (or tensile) loads acting so as to shorten (or increase) the length of the truss member.

Let us consider a bar of length L, cross sectional area *A* and an elastic modulus *E*. It is fixed on one of its end and is acted upon a force *P* along its length.