X-Shaped ternary five-block molecules, composed of a rigid p-terphenyl core, two terminal glycerol groups and two flexible n-alkyl or semiperfluorinated chains fixed laterally to opposite sides of the terphenyl moiety, form liquid crystalline phases built up of honeycomb-like arrays of polygonal cylinders, where the rod-like aromatic cores form cylinder walls with a thickness equal to the width...

I n 1912 Hermann Weyl [W] posed the following problem: given the eigenvalues of two n× n Hermitian matrices A and B, how does one determine all the possible sets of eigenvalues of the sum A + B? When n = 1, the eigenvalue of A + B is of course just the sum of the eigenvalue of A and the eigenvalue of B, but the answer is more complicated in higher dimensions. Weyl’s partial answers to this prob...

Using scanning tunneling microscopy with Fe-coated W tips and first-principles calculations, we show that the interface of epitaxial graphene/SiC(0001) is a warped graphene layer with hexagon-pentagon-heptagon (H(5,6,7)) defects that break the honeycomb symmetry, thereby inducing a gap and states below E(F near the K point. Although the next graphene layer assumes the perfect honeycomb lattice,...

The work describes the out-of-plane properties of a curved wall honeycomb structure evaluated using analytical models and finite elements techniques. Out-of-plane are calculated theoretical approach based on energy theorems validated full-scale element technique to simulate transverse shear tests. effects curvature walls depth cells elastic constants excellent agreement is observed between nume...

Abstract Honeycombs are widely used to laminarize fluid streams by inhibiting the lateral components of fluctuating velocity. However, they also produce additional turbulence themselves due formation large-scale instabilities and breakup individual velocity profiles stemming from honeycomb cells. In present research, we use 2D-planar particle image velocimetry study how honeycomb-generated is a...

Automobile light weight structural composites are subjected to the various loadings in their service lives. Honeycombs are increasingly used as core structures in automobile light weight structures as energy absorbers. In this paper the energy absorption of honeycomb panels under impact of cylindrical projectile is numerically and experimentally studied. The effect of the core materials and cro...

For zirconia-based technical ceramics, the unique advantages of micro-architecture geometries combined with potent mechanical and functional properties have been challenging to implement owing additive manufacturing restrictions. In this work, we present a stereolithography-based approach involving slurry development for yttrium-stabilized tetragonal zirconia polycrystals (Y-TZP), followed by p...