Stability and initial post-buckling of a standing sandwich beam under terminal force and self-weight

Han, Bin; Li, Feihao; Ni, Chao; Zhang, Qiancheng; Chen, Chang; Lu, Tianjian

doi:10.1007/s00419-015-1079-3

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…At the static analysis step, a gravity load is applied and the option of large deformation is turned on. For calculating the critical buckling IPDL, only a linear buckle analysis step is required [10,23]. For both face sheets and core, aluminum alloy is selected as the material make, with density ρ Al = 2700 kg/m 3 , Poisson ratio ν = 0.3, and Young's modulus E Al = 70 GPa.…”

Section: Validationmentioning

confidence: 99%

“…As an elemental thin structure component, the mechanical performance of a monolithic plate in gravitational field has been extensively studied. At the early stage, the stability and vibration of a rectangular plate subjected to self-weight, or acceleration-induced body force, were characterized by treating the body force as linearly varying in-plane distributed loads (IPDLs) [9][10][11]. Afterwards, the elastic stability and vibration of a standing monolithic plate with different boundary conditions (BCs) were investigated by applying either the classical or the Reissner-Mindlin plate theory [12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

“…* FE results calculated with FE code ABAQUS (element type: C3D8R); existing theoretical predictions[13,14,16,17] did not account for shear effect of the monolithic plate and are independent of plate slenderness ratio L/h[10].…”

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confidence: 99%

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A Three-Dimensional Vibration Theory for Ultralight Cellular Sandwich Plates Subjected to Linearly Varying In-Plane Distributed Loads

Han

Zhang

et al. 2023

Materials

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Thin structural elements such as large-scale covering plates of aerospace protection structures and vertical stabilizers of aircraft are strongly influenced by gravity (and/or acceleration); thus, exploring how the mechanical behaviors of such structures are affected by gravitational field is necessary. Built upon a zigzag displacement model, this study establishes a three-dimensional vibration theory for ultralight cellular-cored sandwich plates subjected to linearly varying in-plane distributed loads (due to, e.g., hyper gravity or acceleration), with the cross-section rotation angle induced by face sheet shearing accounted for. For selected boundary conditions, the theory enables quantifying the influence of core type (e.g., close-celled metal foams, triangular corrugated metal plates, and metal hexagonal honeycombs) on fundamental frequencies of the sandwich plates. For validation, three-dimensional finite element simulations are carried out, with good agreement achieved between theoretical predictions and simulation results. The validated theory is subsequently employed to evaluate how the geometric parameters of metal sandwich core and the mixture of metal cores and composite face sheets influence the fundamental frequencies. Triangular corrugated sandwich plate possesses the highest fundamental frequency, irrespective of boundary conditions. For each type of sandwich plate considered, the presence of in-plane distributed loads significantly affects its fundamental frequencies and modal shapes.

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Section: Validationmentioning

confidence: 99%