The potential deformation energy in tension
Under the static specimen tension, the tensile force F increasing slowly from zero up to some significance, lengthens the specimen by the
W = U
If the tension diagram is drawn in the (F,
The total work spent on the specimen rupture is given by the OABDN figure area of the tension diagram, the NMD triangle area corresponds to the strain work vanishing at the specimen rupture. The deformation work per a unit bar volume is the specific potential energy of deformation:
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value, simultaneously accomplishing work W. This work is accumulated as a potential deformation energy U in the deforming specimen; ignoring insignificant energy losses (for example, heat), we conclude that
with the constant cross section A and the same normal force N = F will be equal to
