In-plane and out-of-plane compressive mechanical properties of Nomex honeycombs and their prediction

Abstract

Based on experiments used to evaluate the in-plane and out-of-plane mechanical properties of Nomex honeycomb, the influences of different cell geometries and honeycomb densities on the mechanical properties of honeycombs were investigated. The content of each component of honeycomb was analysed by disassembly. Furthermore, by introducing the wall thickness ratio and a correction function, a theoretical prediction model of out-of-plane mechanical properties was constructed. As for the prediction of in-plane mechanical properties, a three-layer structural finite element model of the cell walls was established through the use of a user-defined integration method.

Numerical Analysis of Out-of-Plane Crushing of Reinforced Honeycomb Core and Effect of Cell Parameters on its Properties

“…Using the super-folding method, the energy-absorption properties of origami designs honeycombs were theoretically determined. The accuracy of the proposed model was confirmed by the error between the numerical simulations and theoretical results, which ranged from -8.55% to 6.50% [29][30][31]. In this regard, the current research explored with the influences of cell parameters of honeycomb core reinforced using numerical analysis especially for out-of-plane structures.…”

Compressive properties characterization of PBO paper honeycomb core constituent material and relationship with honeycomb behaviors

“…The flattened cell walls generally consist of two types of failure: buckling and crack for double-layered wall; fold and fracture for single-layered due to the adhesive failure (Figure 6(f) and (g)). 28 Figure 7 is a sketch showing the detailed deformation process. A local buckling appeared on the honeycomb cell walls (Figure 7(b)).…”

“…The flattened cell walls generally consist of two types of failure: buckling and crack for double-layered wall; fold and fracture for single-layered due to the adhesive failure (Figure 6(f) and (g)). 28…”

Flatwise compression behaviour and mechanical properties of gradient-tandem nomex honeycomb sandwich panels

“…Compared to in-plane compression loading, out-of-plane compression loading leads to higher peak force and energy absorption in the honeycomb structure. 23,24 Extensive experimental research has unequivocally demonstrated the exceptional bearing capacity and energy absorption capabilities of Nomex honeycombs. Nevertheless, there is an imperative for continued exploration to unlock the full potential of Nomex honeycomb sandwich panels, driven by ever-increasing demands and requirements.…”