Shear buckling in foam-filled web core sandwich panels using a Pasternak foundation model

Briscoe, Casey R.; Mantell, Susan C.; Davidson, Jane H.

doi:10.1016/j.tws.2009.12.005

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…The solution for plates under uniform compression is well-known 11 , and is incorporated, for example, in most texts on sandwich panel design. 1,12 More recently, Briscoe et al 2 developed solutions for plates loaded by in-plane shear stresses. Based on a combination of¯nite element modeling and physical prototype testing, the authors demonstrated that a Pasternak foundation model is suitable for long plates in which the ratio of the length to width is greater than four.…”

Section: Buckling Modelmentioning

confidence: 99%

Buckling of a Plate on a Pasternak Foundation Under Uniform in-Plane Bending Loads

Briscoe

Mantell

Davidson

2013

Int. J. Str. Stab. Dyn.

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In-plane bending loads occur in many thin-walled structures, including web core sandwich panels (foam-¯lled panels with interior webs) under transverse loading. The design of such structures is limited in part by local buckling of the thin webs and the subsequent impact on sti®ness and strength. However, the core material can have a signi¯cant impact on web buckling strength and thus must be considered in design. This paper presents solutions for the buckling strength of simply supported plates under in-plane bending loads. The location of the neutral bending axis is allowed to vary and is characterized by a load parameter. A Pasternak model is used to account for the resistance of the foundation to compression and shear. Using the principle of minimum potential energy, buckling solutions are developed for in¯nitely long plates and representative foundation materials. The solutions match known results for two special cases: Uniform loading with variable foundation, and bending loads with no foundation. An order of magnitude increase in buckling strength is possible, depending on loading and foundation sti®ness. The results suggest an important avenue for future development of lightweight structures, including sandwich panels and structures such as plate girders that are not typically associated with the use of foam¯lling.

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Section: Buckling Modelmentioning

confidence: 99%

Buckling of a Plate on a Pasternak Foundation Under Uniform in-Plane Bending Loads

Briscoe

Mantell

Davidson

2013

Int. J. Str. Stab. Dyn.

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“…This approach is limited to specific construction layout and specific boundary conditions. A different approach based on an elastic foundation approach with two parameters that yields only wrinkling modes has been adopted by Briscoe et al [4]. A high-order theory approach used by Kant and Patil [14] replaced the layered sandwich panel with an equivalent high-order shear deformable plate but it is unable to determine the local buckling modes within the overall behavior.…”

Section: Introductionmentioning

confidence: 99%

Shear buckling of sandwich plates – Incompressible and compressible cores

Frostig

2016

Composites Part B: Engineering

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“…Theoretical/numerical models and experimental techniques were developed to study buckling phenomena in sandwich panels under various loading conditions [ 18 , 19 , 20 ]. Fringe projection techniques [ 21 , 22 ] are naturally suited for monitoring the large out-of-plane displacements that may occur when thin-walled structures, like sandwich panels, experience buckling.…”

Section: Introductionmentioning

confidence: 99%

Structural Response of Polyethylene Foam-Based Sandwich Panels Subjected to Edgewise Compression

et al. 2013

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This study analyzes the mechanical behavior of low density polyethylene foam core sandwich panels subjected to edgewise compression. In order to monitor panel response to buckling, strains generated in the facesheets and overall out-of-plane deformations are measured with strain gages and projection moiré, respectively. A finite element (FE) model simulating the experimental test is developed. Numerical results are compared with moiré measurements. After having been validated against experimental evidence, the FE model is parameterized, and a trade study is carried out to investigate to what extent the structural response of the panel depends on the sandwich wall construction and facesheet/core interface defects. The projection moiré set-up utilized in this research is able to capture the sudden and very localized buckling phenomena occurring under edgewise compression of foam-based sandwich panels. Results of parametric FE analyses indicate that, if the total thickness of the sandwich wall is fixed, including thicker facesheets in the laminate yields a larger deflection of the panel that becomes more sensitive to buckling. Furthermore, the mechanical response of the foam sandwich panel is found to be rather insensitive to the level of waviness of core-facesheet interfaces.

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Shear buckling in foam-filled web core sandwich panels using a Pasternak foundation model

Cited by 11 publications

References 22 publications

Buckling of a Plate on a Pasternak Foundation Under Uniform in-Plane Bending Loads

Buckling of a Plate on a Pasternak Foundation Under Uniform in-Plane Bending Loads

Shear buckling of sandwich plates – Incompressible and compressible cores

Structural Response of Polyethylene Foam-Based Sandwich Panels Subjected to Edgewise Compression

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