INTRODUCTION:
An important aspect of the analysis and design of structures relates to the deformations
caused by the loads applied to a structure. Clearly it is important to avoid deformations so
large that they may prevent the structure from fulfilling the purpose for which it is intended.
But the analysis of deformations may also help us in the determination of stresses. It is not
always possible to determine the forces in the members of a structure by applying only the
principle of statics. This is because statics is based on the assumption of undeformable,
rigid structures. By considering engineering structures as deformable and analyzing the
deformations in their various members, it will be possible to compute forces which are
statically indeterminate. Also the distribution of stresses in a given member is
indeterminate, even when the force in that member is known. To determine the actual
distribution of stresses within a member, it is necessary to analyze the deformations which
take place in that member. This chapter deals with the deformations of a structural
member such as a rod, bar or a plate under axial loading.
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