The ability of an object to return to its original form upon the removal of the applied force is called elastic deformation.

^{Graphic of Elastic Deformation (Generated by AI)}

Derivation

In a stress-strain graph, the area under the linear region is referred to as the elastic region. Whether an object has exceeded its elastic deformation region is determined by the stress value the material reaches under load. Accordingly, if the stress value in the part under load does not exceed the yield point of the material, the structure remains within the boundaries of the elastic region, and only temporary deformation is involved (elastic deformation).