Ingenieurwissenschaften und zugeordnete Tätigkeiten
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- 2018 (1)
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- Stress-strain relations (1) (entfernen)
Organisationseinheit der BAM
- 8 Zerstörungsfreie Prüfung (1) (entfernen)
The stress-strain behavior of microcracked polycrystalline materials (such as ceramics or rocks) underconditions of tensile, displacement-controlled, loading is discussed. Micromechanical explanation andmodeling of the basic features, such as non-linearity and hysteresis in stress-strain curves, is developed,with stable microcrack propagation and “roughness” of intergranular cracks playing critical roles. Ex-periments involving complex loading histories were done on large- and medium grain sizeb-eucryptiteceramic. The model is shown to reproduce the basic features of the observed stress-strain curves.