Cellular Cores with Negative Poisson’s Ratio for Sandwich Panels

Abstract

Sandwich structures have been intensively studied since their first extensive use in the Second World War. The major interest of researchers nowadays is to develop high-performance cellular cores while lowering production costs, and by this, launching the sandwich panels into a wide range of industrial applications. A particular category of such cores is the structures with negative Poisson’s ratio (NPRs). Taking into account the existing structures developed up to the present, the main objective of this paper is to present a consistent study on this issue and to investigate the transition process of a structure from positive to negative Poisson’s ratio.