Hooke’s law applies to elastic materials and describes how a material deforms when an external force is applied. The law states that the deformation (elongation or compression) is proportional to the applied force, up to a certain point called elastic limit.

In the tinplate deep drawing process, forces are applied to the sheet metal to form it into a specific shape. During this process, the tinplate undergoes elastic and plastic deformations. In the elastic stage, the tinplate follows Hooke’s law, but once the elastic limit is reached, the deformation becomes plastic and permanent, and no longer follows Hooke’s law.

Therefore, although Hooke’s law applies in the initial stage of the drawing process, it is not fulfilled throughout the process, since the tinplate undergoes permanent plastic deformations.

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