Crush Behavior of Corrugated Cores Sandwich Panels

Abstract

The out-of-plane quasi-static compressive behavior of four types of corrugated cores (V-type, U-type, X-type and Y-type core) has been investigated by experiment and FE simulations. By transient dynamic finite element analysis code MSC.Dytran numerical simulations were performed for calculating crushing forces, deformation mode and energy absorption. The FE simulations predict the crush behavior of cores with reasonable accuracy and provide the whole progressive buckling process and deformation modes. Experiment and simulation indicate that the U-type core, V-type core and X-type core structures show excellent crushing resistance performance and energy absorption characteristic. The crush performance of the Y-type core structures is relatively poor because of bending mode.

Single- and double-layer aluminum corrugated core sandwiches under quasi-static and dynamic loadings

“…The specific energy absorption of the tested single-layer corrugated core at quasi-static strain rate varies between 0.4 and 0.61 kJ kg −1 at nominal strain of 0.57 corresponding to the displacement of abrupt increase in load values. These energy absorption values are comparable, by taking into account the densification strains, with the specific energy absorptions of mild steel V-, U-, X- and Y-type core structures varying between 0.94 and 4.04 kJ/kg, at the final strains between 0.66 and 0.85 [18]. The specific energy absorption of the tested corrugated structure increased to 1.31 kJ kg −1 when the final strain increased to 0.66.…”

“…V-frame corrugated structures were shown to be more inertia sensitive than Y-frame, as the deformation in V-frame structure is the stretching governed buckling, while in Y-frame core it proceeds with the bending of one of the legs [4]. It was also shown that U-, X- and V-frame cores exhibiting buckling mode of deformation showed higher crushing strengths and energy absorptions than Y-frame cores exhibiting the bending mode of deformation [18]. The sandwich panels constructed using the periodic cellular metal constructions are attractive both for the impact load mitigation such as blast loading, where the large amount of blast energy is required to be absorbed by the progressive crushing of the core, and for the heat exchange media, where the heat dissipation is request in a relatively small space [1].…”

Large deformation of corrugated sandwich panels under three-point bending

“…Compared with foam sandwich panel, honeycomb sandwich panel and lattice sandwich panel, corrugated sandwich panel has higher bending, shear and torsion resistances [8]. The corrugated core can be in different shapes, such as triangular [9], trapezoidal [10,11], curvilinear [12], sinusoidal [10], V-shape, U-shape, X-shape, and Y-shape [13], etc. The geometric configuration has a significant influence on the mechanical properties.…”

Sandwich Panels Bond with Advanced Adhesive Films

“…Core materials are subjected to shear loads and compression loads in the sandwich structure, examples of these materials and structures, depending on the application, are metal or polymeric foams, honeycomb structures, cork, and even corrugated cores [11][12][13][14][15][16][17]. Foams are characterized by low densities, from polymeric foams such as polyvinyl chloride (PVC), polymethacrylimide (PMI), expanded polystyrene (EPS), and polyurethane (PU) to phenolic resin-based foams.…”