Distortion energy

The distortion energy describes the amount of energy in materials that must be applied in order to realize the deviations from the ideal, low-energy material structure. Such distortions are caused by lattice errors, e.g. B. by voids or inclusions / precipitates .

properties

As a rule, one speaks of elastic distortion , which follows the principles of Hooke's law . The elastic strain energy only plays a role in solids and is of particular interest in crystals .

Due to the directional dependence of the elasticity modulus of a material, the distortion energy may assume a minimum if lattice defects have a certain direction in the crystal or show a periodic arrangement in a certain direction and distance.

There are three different models for calculating the strain energy in materials science :

• the Green function
• the Fourier integrals and
• the Eshelby theory (after John D. Eshelby ).

literature

• Toshio Mura: Micromechanics of defects in solids. Martinus Nijhoff Publishers, 1982