Zur Analyse von technischem Eigelb

Ohne Zusammenfassung     

On moving continua with contacts and sliding friction: Modeling,general properties and examples

Many technical applications feature contacts between moving continua, where the contact zone is more or less spatially fixed. This contribution describes the modeling of such systems by means of weak formulations derived from Hamilton’s Principle in a material as well as a spatial formulation. Furthermore, linearizations about a stationary solution are carried out, the arising differential operators are stated and discussed with respect to symmetry. Particular attention is paid to the structure and physical interpretation of the contributions arising from the contacts as well as those due to the transport motion. The article closes with several examples.     

Poly­[methyl­ammonium tris(μ2‐form­ato‐κ2O:O′)­cobalt(II)]

The structure of the title compound, {(CH₆N)[Co(CHO₂)₃]}_n, consists of a three‐dimensional net of central Co^II ions connected via formate (methane­diolate) bridges. The negative charge is compensated by protonated methyl­amine cations. The CoO₆ chromophores form slightly distorted octahedra, which are bridged by C atoms of formate groups. The central Co atom lies on an inversion center and most of the other atoms lie on an m plane.