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Sandwich panel

About: Sandwich panel is a research topic. Over the lifetime, 4665 publications have been published within this topic receiving 49812 citations.


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Journal ArticleDOI
TL;DR: In this paper, an analytical solution for the ballistic limit of a honeycomb plate subjected to normal impact by blunt and spherical projectiles is presented, which involves a three-stage, perforation process that results in complete perfation of the sandwich.
Abstract: An analytical solution for the ballistic limit of a honeycomb plate subjected to normal impact by blunt and spherical projectiles is presented. The solution involves a three-stage, perforation process that results in complete perforation of the sandwich. Stages 1–3 describe perforation of the top facesheet, honeycomb core, and bottom facesheet, respectively. Residual velocities in Stages 1 and 2 are found from energy balances between each stage. The plastic work dissipated in deformation and fracture at each stage is approximated from the solution of the previous stage. Shear forces are transmitted in the bond between facesheets and honeycomb core. The predicted ballistic limits are found to be within 5% of the measured ballistic limits for sandwich plates perforated by the blunt and spherical projectiles. The lateral extent and deformation of the damaged facesheets are also found to be within 34 and 51% of limited test results, respectively. It has also been found that most of the work is dissipated in perforation of the bottom facesheet during impact. The work to perforate the bottom facesheet by the blunt and spherical projectiles accounts for 63–85 and 55% of the initial kinetic energy, respectively. Therefore, the perforation resistance of the bottom facesheet, rather than the top facesheet or honeycomb core, would be an important parameter in determining the perforation resistance of the entire sandwich panel.

72 citations

Book ChapterDOI
TL;DR: In this paper, Zhao et al. reported the numerical results of the inversed perforation test instrumented by Split Hopkinson Pressure Bar SHPB with an instrumented pressure bar on the AlSi7Mg 0.5 aluminum foam core sandwich panels with 0.8mm thickness.

72 citations

Journal ArticleDOI
TL;DR: In this paper, a new type of ultra-lightweight metallic lattice structure (named as the X-type structure) was reported, which was formed by two groups of staggered struts in the traditional pyramid structure, and fabricated by folding expanded metal sheet along rows of offset nodes and then brazing the folded structure with top and bottom facesheets to form sandwich panels.
Abstract: A new type of ultra-lightweight metallic lattice structure (named as the X-type structure) is reported. This periodic structure was formed by two groups of staggered struts in the traditional pyramid structure, and fabricated by folding expanded metal sheet along rows of offset nodes and then brazing the folded structure (as the core) with top and bottom facesheets to form sandwich panels. The out-of-plane compressive and shear properties of the X-type lattice sandwich structure were investigated experimentally and compared to those of the sandwich having a pyramidal truss core. It is found that the formation of the 2-dimensional staggered nodes can effectively make the X-type structure more resistant to inelastic and plastic buckling under both compression and shear loading than the pyramidal lattice truss. Obtained results show that the compressive and shear peak strengths of the X-type lattice structure are about 30% higher than those of the pyramidal lattice truss having the same relative density.

71 citations

Journal ArticleDOI
TL;DR: In this paper, the results of the experimental investigation into the addition of indentations of power-law profile into composite plates and panels and their subsequent inclusion into composite honeycomb sandwich panels are reported.

71 citations

Journal ArticleDOI
TL;DR: In this article, a new empirical Ballistic Limit Equation (BLE) was derived from an existing Whipple-shield BLE, which provided a good level of accuracy in predicting the ballistic performance of stand-alone sandwich panels.

71 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202384
2022217
2021244
2020280
2019264
2018252