Plastic deformation energy storage

What is stored energy in plastic deformation?

Technically, the stored energy predicted by these approaches and models is the macroscopic equivalent of energy associated with defects generated during plastic deformation. Using these models, important information regarding the stored energy in plastic deformation can be obtained (Ghosh et al., 2017).

How is the energy stored during non-homogeneous plastic deformation calculated?

On the basis of the stress–strain curve only the energy stored during non-homogeneous plastic deformation can be estimated. The part of the stored energy calculated from the stress–strain curve has been compared with the total stored energy determined experimentally during uniaxial tension.

How does plastic deformation affect storage and dissipation rates?

The storage energy is directly related to the density and type of dislocations, while heat dissipation is primarily attributed to the movement of dislocations. Thus, the storage and dissipation rates of plastic work will vary with plastic deformation.

Is plastic deformation a dissipative process?

Plastic deformation is a highly dissipative process involving dislocation production and storage, motion and annihilation. It has long been recognised that most of the mechanical energy expended in plastic straining is converted into heat while the remainder (a few percent only) is stored in the deformed solid as internal energy , , , .

Can a stress-strain curve calculate the stored energy of plastic deformation?

If the energy of statistically stored dislocations is negligible in comparison with the stored energy connected with non-homogeneous plastic deformation, the stored energy can be calculated from the stress–strain curve. Authors believe that this condition is satisfied at the initial state of plastic deformation of fine-grained materials.

How is plastic deformation energy converted to heat & dissipated?

Apart from plastic deformation energy stored in the form of defects (such as dislocations, vacancies, etc.), the remaining is converted to heat and dissipated. The partition of plastic work converted to heat during plastic deformation has also been widely investigated.