Bending performance of a sandwich beam with sheet metal pyramidal core

Iftimiciuc, Mihaela; Lache, Simona; Vandepitte, Dirk; Velea, Marian N.

doi:10.1016/j.mtcomm.2022.103490

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…The contact areas between the fixed compression block – bottom support plate and loading compression block – top support plate, are modelled as a surface-to-surface contact with a frictional coefficient of 0.17 corresponding to dry, in air, steel-to-steel interaction. 25 The reaction force and displacement during the simulation are expressed in the reference point corresponding to the load compression block.…”

Section: Compressive Performance Of the Hierarchical Sandwich Honeycombmentioning

confidence: 99%

Out-of-plane compression mechanism of a novel hierarchical sandwich honeycomb core

Iftimiciuc

Derluyn²,

Pflug³

et al. 2023

Jnl of Sandwich Structures & Materials

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Honeycomb cores are used extensively in different sectors of industry to build advanced lightweight structures which take advantage of high stiffness-to-weight and strength-to-weight ratios. To further increase their mechanical properties, structural hierarchy is considered already from a conceptual point of view. It is proven to be highly effective in enhancing mechanical performance in different loading scenarios but affordable realisation of practical applications remains limited. The present study focuses on the out-of-plane compressive behaviour of a novel hierarchical sandwich honeycomb core with an emphasis on compressive strength, both in virtual and in experimental testing. The finite element model is validated for through-the-thickness compressive loading by physical experiments and it can subsequently be used for further structural optimization. The paper concludes with a comparison between the proposed hierarchical structure and conventional expanded honeycombs. The performance analysis highlights the advantages of the introduction of structural hierarchy to the state-of-the art honeycomb and it shows a high potential for the use in the construction of sandwich panels and parts.

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Section: Compressive Performance Of the Hierarchical Sandwich Honeycombmentioning

confidence: 99%

Out-of-plane compression mechanism of a novel hierarchical sandwich honeycomb core

Iftimiciuc

Derluyn²,

Pflug³

et al. 2023

Jnl of Sandwich Structures & Materials

Self Cite

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“…[1][2][3] However, the construction of multifunctional sandwich structures through the use of traditional closed cell foam or honeycomb cores presents a challenge that is not feasible. Open-cell structures and superior design capabilities make three-dimensional (3D) periodic truss cores, such as pyramidal cores, [4][5][6] tetrahedral cores, 7,8 octet-truss cores, 9 Kagomes cores, 10 corrugated lattice cores 11 and 3D lattice metamaterials cores 12 attractive candidates for multifunctional ultralight structures.…”

Section: Introductionmentioning

confidence: 99%

Global buckling behavior of a sandwich beam with graded lattice cores

Zhang,

Liu,

Wang

et al. 2023

Jnl of Sandwich Structures & Materials

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The present study investigates the global buckling behavior of sandwich beams with graded lattice cores. The continuous equivalent theory is utilized to construct a discrete graded lattice core sandwich beam for a continuously varying gradient beam, whose material properties vary with position. A theoretical model of sandwich beams with graded lattice cores is established using the energy method. Finite element models are developed in ABAQUS to validate the theoretical results. Furthermore, four sets of specimens were manufactured and tested to validate the theoretical analysis methods used. The effects of the graded parameters and geometric parameters on the critical buckling load of sandwich beams with graded lattice cores are discussed. The graded lattice sandwich beams exhibit global buckling when the graded parameter is small, with the influence on buckling performance being minor. However, as the graded parameter increases, the graded lattice sandwich beams experience local buckling, and their buckling resistance weakens. Therefore, graded parameters that are too large and cause local buckling should be avoided in gradient design.

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“…According to the deformation performance, the lattice materials can be divided into stretchingdominated and bending-dominated structures, and the stretch-dominated structures exhibit superior stiffness and strength than the bending-dominated ones. [4] Until now, a lot of lattice structure topologies have been found such as pyramidal lattice, [5][6][7] kagome lattice structure, [8] octet lattice material, [9] tetrahedral lattice, [10] corrugated structure, [11] prismatic structure, [12] and hourglass lattice. [13] Previous investigations on the mechanical behavior of various lattice materials are mostly focused on predicting the macroscopic stiffness and strength experimentally, numerically and theoretically.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Simulation Analysis on the Mechanical Behavior of 3D‐Enhanced Al‐Based Tetrahedral Lattice Materials

Xue

Huang

et al. 2022

Physica Status Solidi (a)

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Herein, the compressive mechanical behavior of novel 3D tetrahedral lattice materials is investigated by ways of experimental, numerical, and analytical methods with a good performance of accuracy. Samples with varied length–diameter ratios are fabricated through 3D printing combined with investment casting method. The compressive behavior, deformation characteristic, and energy property of the lattice materials are comprehensively recorded and analyzed with respect to the geometric parameter and compression directions. It is observed that the length–diameter ratio exhibits a significant influence on the mechanical performance and energy absorption of the materials, that is, the lower the length–diameter ratio, the higher the relative density, strength, and energy absorption. Good agreements are observed among the experimental, numerical, and analytical results within a relative acceptable error. Moreover, the mechanical properties and deformation characteristics of lattice materials depend on compression directions to a great extent. In addition, the novel tetrahedral lattice materials with reasonable relative density present superior performance features compared with the other cellular materials.

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Bending performance of a sandwich beam with sheet metal pyramidal core

Cited by 3 publications

References 26 publications

Out-of-plane compression mechanism of a novel hierarchical sandwich honeycomb core

Out-of-plane compression mechanism of a novel hierarchical sandwich honeycomb core

Global buckling behavior of a sandwich beam with graded lattice cores

Experimental and Simulation Analysis on the Mechanical Behavior of 3D‐Enhanced Al‐Based Tetrahedral Lattice Materials

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