Design of Composites Using Failure-Mode-Concept-Based Tools — from Failure Model Validation to Design Verification

Novel simulation-driven product development shifts the role of physical testing to virtual testing. This requires High Fidelity concerning material models such as strength failure conditions (SFCs) (strength criteria). Usual assumption for model is an ideally homogeneous, usually homogenized solid material. Following Beltrami and Mohr–Coulomb element may experience — related different energy portions a shape change, volume friction, these features can be linked invariants, which great advantage when developing criteria. Based on this, author derived SFCs large variety isotropic brittle structural materials plexiglass, porous concrete stone, cast iron, Normal Concrete, UHPC, sandstone, mild steels, foam, monolithic ceramics, further transversely-isotropic fiber-reinforced dense polymer UD Laminas (plies, lamellas) orthotropic Fabrics ceramics. Beside uniaxial strengths, available multiaxial fracture test data above-mentioned had investigated because in case are required really achieve 3D-validation respective SFC model. During Failure Mode Concept FMC, closer look at symmetry facts was taken whereby question arose homogeneous materials: Is there ‘generic’ number natural material? Namely, Material Symmetry seems confirm that this valid elastic entities, yield modes modes, strengths Rt with Rc, toughness entities KIc ≡ $${\mathrm{K}}_{\mathrm{cr}}^{\mathrm{t}}$$ $${\mathrm{K}}_{\mathrm{cr}}^{\mathrm{c}}$$ also ‘basic’ invariants used generate SFCs, represent failure, just where mode occurs once. The concluded from behavior: (1) ‘Generic Numbers’ exist 2 5 materials. (2) Different but similar behaving basically treated same SFC.