Edgewise Compressive Property for Sandwich Panel of Steel Plates with Isosceles-trapezoid Honeycomb Core of Fiber Cloth Reinforced Epoxy Resin

doi:10.11901/1005.3093.2015.12.931

Chinese Journal of Materials Research

2015, Vol. 29

Issue (12): 931-940 DOI: 10.11901/1005.3093.2015.12.931

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Edgewise Compressive Property for Sandwich Panel of Steel Plates with Isosceles-trapezoid Honeycomb Core of Fiber Cloth Reinforced Epoxy Resin

Jiliang ZHENG(

),Yong SUN,Mingjun PENG

School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China

Cite this article:

Jiliang ZHENG,Yong SUN,Mingjun PENG. Edgewise Compressive Property for Sandwich Panel of Steel Plates with Isosceles-trapezoid Honeycomb Core of Fiber Cloth Reinforced Epoxy Resin. Chinese Journal of Materials Research, 2015, 29(12): 931-940.

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Abstract

The edgewise compressive property of sandwich panel of steel plates with isosceles-trapezoid honeycomb core of fiber cloth reinforced epoxy resin is measured by using a material testing machine, while a simulation mode is established to describe the edgewise compressive behavior. The edgewise compressive pressure may induce three types of damages of the sandwich panel, namely, the broken of plates, the buckling instability of the sandwich panel and the detachment of plates with the honeycomb core. Under an applied edgewise compressive pressure, the plates are the main load bearing component of the sandwich panel, while the honeycomb core acts only as a connector and supporter . The parameter related with the structure and the material of the plates has a great influence on the in-panel compressive strength and the bearing stress for the sandwich panel. In the contrast, parameter related with the structure and the material of the honeycomb core has a small influence on the compressive strength of the sandwich panel, but the height of honeycomb core has a great influence on the bearing stress of the sandwich panel.

Key words: inorganic non-metallic materials isosceles-trapezoid honeycomb core compressive strength load stress sandwich panel in-plane compression

Received: 05 March 2015

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	Jiliang ZHENG
	Yong SUN
	Mingjun PENG

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https://www.cjmr.org/EN/10.11901/1005.3093.2015.12.931 OR https://www.cjmr.org/EN/Y2015/V29/I12/931

Fig.1 Isosceles-trapezoid honeycomb core of glass steel sandwich panel geometry (a) and unit cell body’s geometry parameters (b)

Fig.2 Finite element model (a) and mesh element (b) and boundary conditions (c) and path (d) for isosceles trapezoid-glass steel honeycomb core's sandwich panel under end compressive loading

Fig.3 Different damage way's von-Mises and deformation cloud picture for isosceles-trapezoid honeycomb core of glass steel sandwich panel (a) panel is broken, (b) sandwich panel is instability, (c) panel and honeycomb core is separation

Fig.4 Distribution of interfacial normal stress (z) and maximum shear stress (b) for paths in honeycomb core and interfacial maximum shear stress (c) for paths in panel

Fig.5 Deformation schematic diagram of isosceles-trapezoid honeycomb core of glass steel sandwich panel

Fig.6 Compressive strength of broken panel in isosceles-trapezoid honeycomb core of glass steel sandwich panel is impacted by fiber’s arrangement direction in honeycomb core and panel, (a) ROT.X in part1 and part3, (b) ROT.Z in part1 and part3, (c) ROT.X and ROT.Y in part2, (d) ROT.Y and ROT.Z in panel

Fig.7 Effects of panel's thickness (a), Part2's thickness t₁ (b), Part2's height h (c), upper-side's length a (d) and height h_c (e) on Break a compressive strength of isosceles-trapezoid for honeycomb core's cross section shape

Fig.8 Compressive strength of buckling unstable isosceles trapezoid honeycomb core of glass steel sandwich panel is impacted by fiber's arrangement direction in honeycomb core and panel (a) ROT.X and ROT.Z in Part1 and Part3, (b) ROT.X and ROT.Y in Part2, (c) ROT.Y and ROT.Z in panel

Fig.9 Effects of panel's thickness (a)、Part2's thickness t₁ (b)、Part2's height h (c)、upper-side's length a and height h_c (d) of isosceles-trapezoid for honeycomb core's cross section shape on buckling instability load stress

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