| Popis: |
Sandwich structures with cellular cores and metallic or composite skins are novel structural concepts with a high potential for application in modern aerospace structures, due to their high bending stiffness and impact energy absorption capability, combined with thermal insulation and vibration damping. In this chapter, the specific characteristics of cellular materials that act as cores in aeronautical sandwich structures are presented. Several typical types of regular lattice cellular cores are presented, focusing on the open lattice or open micro-truss cores, which offer specific advantages compared to the conventional honeycomb or foam cores for aerospace applications. The main manufacturing technologies applied for the production of cellular cores depending on cellular material type and unit cell size are also described. Consequently, an overview of analysis and simulation approaches of lattice cores is briefly presented and demonstrated in the case of a Body Cantered Cubic (BCC) unit cell. Finally, analysis and simulation techniques suitable for sandwich structures with cellular cores are presented. |
