The Shear Modulus of Foil Honeycomb Cores

Kelsey, S.; Gellatly, R. A.; Clark, Brett W.

doi:10.1108/eb033026

Cited by 193 publications

(66 citation statements)

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“…They are typically manufactured from aluminum (Al) alloys and have a relative densityρ (that is, the ratio of the density of the honeycomb treated as a homogeneous continuum to the density of the solid) of less than 3%. Experiments and simple analyses have shown that their out-of-plane elastic properties scale linearly with the relative densityρ [Kelsey et al 1958;Zhang and Ashby 1992]. In out-of-plane crushing, these honeycombs exhibit a stress peak followed by large stress oscillations associated with the formation of a succession of plastic folds in each cell.…”

Section: Introductionmentioning

confidence: 99%

The shear response of metallic square honeycombs

Côté

Deshpande

Fleck

2006

JOMMS

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Stainless steel square honeycombs have been manufactured by slotting together steel sheets and then brazing the assembly. Their out-of-plane shear response is measured as a function of the relative density of the honeycomb and of the direction of shearing with respect to the material axes of the square honeycomb. The response is nearly isotropic with the shear strength and reasonably insensitive to the loading direction. In contrast to the out-of-plane compressive response, the shear response is monotonically hardening and the shear strength scales linearly with relative density. A simple analytical model based upon uniform deformation of the cell walls is in good agreement with the measured shear behavior at low shear strains, and predicts the onset of wrinkling of the cell walls to reasonable accuracy. Finite element (FE) calculations are accurate up to large values of shear strain, and reveal that the shear strength of the square honeycombs is relatively insensitive to the ratio of honeycomb height to cell size. The shear strength of square honeycombs compares favorably with other competing sandwich core topologies such as pyramidal and corrugated truss cores.

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Section: Introductionmentioning

confidence: 99%

The shear response of metallic square honeycombs

Côté

Deshpande

Fleck

2006

JOMMS

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“…A photograph of the overall single-lap shear test Figure 4. For sake of clarity, the clip gauge is not shown on the Figure 4 but was mounted during the experiments using a standard arrangement for a single-lap shear test [Kelsey et al 1958].…”

Section: Experimental Methodsmentioning

confidence: 99%

Untitled

2006

JOMMS

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Stress analysis is carried out in an orthotropic strip containing a Volterra-type screw dislocation. The distributed dislocation technique is employed to obtain integral equations for a strip weakened by cracks and cavities under antiplane traction. These equations are of Cauchy singular kind, which are solved numerically by generalizing a numerical method available in the literature. Several examples are solved to demonstrate the validity and applicability of the procedure.

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“…Les nids d'abeilles constituant l'âme des panneaux sandwichs sont des structures hétérogènes périodiques qui continuent de faire l'objet de nombreuses études. Les premiers travaux de Kelsey sur la modélisation des âmes ont porté sur la détermination des caractéristiques mécaniques des modules de cisaillement hors plan (Kelsey et al, 1958). Ces propriétés mécaniques sont déterminantes dans le comportement d'une structure sandwich.…”

Section: Homogéneisation Des Milieux Periodiquesunclassified