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