Crystal mechanics
Crystal mechanics describes the laws of deformation of crystalline solids under the influence of mechanical stress . This deformation can take place elastically or elasto-plastic.
object
Crystalline solids, such as metals , deform plastically on certain sliding systems , which are each made up of a sliding plane and a sliding direction. This makes it possible to mathematically describe the deformation of a crystal. The type and number of available sliding systems are linked to the atomic structure of the crystal. For example, face-centered cubic metals have twelve sliding systems. In addition, the deformation of crystals is also possible by forming twins .
The crystallographic texture of a formed material results from the mechanics of the crystallite compound .
The physically correct description of the deformation behavior of crystallites and the simulation of the interplay of crystallite compounds ("Crystal Plasticity Simulation") is the subject of current research. Understanding and predicting the deformation behavior of polycrystals is of great importance for the development of metallic materials.
literature
- WF Hosford: The mechanics of crystals and textured polycrystals. Oxford 1993
- CN Reid: Deformation geometry for material scientists. London 1973
- F. Roters, P. Eisenlohr, TR Bieler, D. Raabe: Crystal plasticity finite element methods in materials science and engineering. Weinheim 2010