Structural response of pyramidal core sandwich columns

Côté, F.; Biagi, Russell; Bart‐Smith, Hilary; Deshpande, V.S.

doi:10.1016/j.ijsolstr.2006.10.004

Cited by 106 publications

(45 citation statements)

References 22 publications

(23 reference statements)

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“…Specimen geometry. Solid truss pyramidal lattice structures were fabricated via a folding operation that bends a diamond perforated sheet to create a single layer of trusses arranged with a pyramidal topology [Zok et al 2004b;Queheillalt and Wadley 2005;McShane et al 2006;Cote et al 2007]. Briefly, the process consisted of punching a metal sheet to form a periodic diamond perforation pattern, folding node row by node row using a paired punch and die tool set, and then brazing this core to solid face sheets to form the sandwich structure.…”

Section: Pyramidal Lattice Panelsmentioning

confidence: 99%

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Mori

Lee

Xue

et al. 2007

JOMMS

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Sandwich panel structures with thin front faces and low relative density cores offer significant impulse mitigation possibilities provided panel fracture is avoided. Here steel square honeycomb and pyramidal truss core sandwich panels with core relative densities of 4% were made from a ductile stainless steel and tested under impulsive loads simulating underwater blasts. Fluid-structure interaction experiments were performed to (i) demonstrate the benefits of sandwich structures with respect to solid plates of equal weight per unit area, (ii) identify failure modes of such structures, and (iii) assess the accuracy of finite element models for simulating the dynamic structural response. Both sandwich structures showed a 30% reduction in the maximum panel deflection compared with a monolithic plate of identical mass per unit area. The failure modes consisted of core crushing, core node imprinting/punch through/tearing and stretching of the front face sheet for the pyramidal truss core panels. Finite element analyses, based on an orthotropic homogenized constitutive model, predict the overall structural response and in particular the maximum panel displacement.

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Section: Pyramidal Lattice Panelsmentioning

confidence: 99%

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Mori

Lee

Xue

et al. 2007

JOMMS

View full text Add to dashboard Cite

show abstract

“…Specimen geometry. Solid truss pyramidal lattice structures were fabricated via a folding operation that bends a diamond perforated sheet to create a single layer of trusses arranged with a pyramidal topology [Zok et al 2004b;McShane et al 2006;Cote et al 2007]. Briefly, the process consisted of punching a metal sheet to form a periodic diamond perforation pattern, folding node row by node row using a paired punch and die tool set, and then brazing this core to solid face sheets to form the sandwich structure.…”

Section: Test Results: Comparison Of the Three Experimentsmentioning

confidence: 99%

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2007

JOMMS

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See inside back cover or http://www.jomms.org for submission guidelines.Regular subscription rate: $500 a year. Polymeric materials often undergo large inhomogeneous deformations at high rates during their use in various impact-resistant energy-absorbing applications. For better design of such structures, a comprehensive understanding of high-rate deformation under various loading modes is essential. In this study, the behavior of polycarbonate was studied during tensile loading at high strain rates, using a splitcollar type split Hopkinson tension bar (SHTB). The effects of varying strain rate, overall imposed strain magnitude and specimen geometry on the mechanical response were examined. The chronological progression of deformation was captured with a high-speed rotating mirror CCD camera. The deformation mechanics were further studied via finite element simulations using the ABAQUS/Explicit code together with a recently developed constitutive model for high-rate behavior of glassy polymers. The mechanisms governing the phenomena of large inhomogeneous elongation, single and double necking, and the effects of material constitutive behavior on the characteristics of tensile deformation are presented.

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“…Cote launched an experimental to explore the in-plane compressive responses and failure mechanisms of pyramidal truss core sandwich columns, the identified failure mechanisms include Euler buckling, shear buckling and face wrinkling [5]. Queheillalt find out that three-dimensional lattice systems have excellent load-bearing ability on account of the stretching-dominated topology structures with high nodal connectivity [6].…”

Section: Introductionmentioning

confidence: 99%

Compressive Property of Aluminum Pyramidal Lattice Material

Yunchao¹,

Guan²,

Xing-yi³

2015

Proceedings of the 2015 International Conference on Materials, Environmental and Biological Engineering

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Abstract. Compressive property of lattice material with pyramidal truss core was investigated under uniform quasi-static compression. Load-displacement response and shape deformations of trusses during compressive loading was simulated by finite element method. The numerical prediction is in good agreement with experimental measurement. Result showed that the compressive process of pyramidal lattice material consist of linear elastic, plastic buckling, secondary contact, softening and densification. Compressive property of lattice material with different truss configuration are compared. Peak compressive stress of lattice material with same relative density depend on the moment of inertia of truss configuration. Truss configuration with higher moment of inertia, can bear higher load.

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Structural response of pyramidal core sandwich columns

Cited by 106 publications

References 22 publications

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Deformation and fracture modes of sandwich structures subjected to underwater impulsive loads

Untitled

Compressive Property of Aluminum Pyramidal Lattice Material

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