The Mohr-Coulomb Fracture Failure Curve τnt(σn) and Associated Topics.

Is this curve really correctly applied in design viewing brittle isotropic and brittle transversely-isotropic UD materials under uni-axial and multi-axial stress states?

1. Task
2. Material Symmetry-dedicated Basics of Cuntze’s Failure-Mode-Concept FMC
3. Generation of FMC-based Strength Failure Conditions SFCs FNF, FSF
4. Stress States and Transformation of the SFC (‘criterion’) FSF into Mohr Stresses
5. The Influence of Hydrostatic Pressure on the Fracture Plane Angle Θfpc 
6. Fracture Body and Multi-axial Stress State-depending Θfp of Normal Concrete
7. Fracture Body and Multi-axial Stress State-depending Θfp of Uni-directionally (UD) Fiber-Reinforced Matrices (Fiber-Reinforced-Plastics and -Concrete, Lamella)

Conclusions & Outlook