A protocol for characterizing the structural performance of metallic sandwich panels: application to pyramidal truss cores

Abstract Honeycomb sandwich panels entice continuously enhanced attention due to its excellent mechanical properties and multi-functional applications. However, the principal problem of sandwich panels is failure by face/core debond. Novel lightweight sandwich panels with hybrid core made of honeycomb, foam and through-thickness pin was developed. Reinforcing polyester pins between faces and core is an effectual way to strengthen the core and enhance the interfacial strength between the face/core to improve the structural performance of sandwich panels. To provide feasibility for pin reinforcement, honeycomb core was pre-filled with foam. Mechanical properties enhancement due to polyester pinning were investigated experimentally under flatwise compression, edgewise compression and flexural test. The experimental investigations were carried out for both “foam filled honeycomb sandwich panels” (FHS) and “polyester pin-reinforced foam filled honeycomb sandwich panels” (PFHS). The results show that polyester pin reinforcement in foam filled honeycomb sandwich panel enhanced the flatwise, edgewise compression and flexural properties considerably. Moreover, increasing the pin diameter has a larger effect on the flexural rigidity of PFHS panels. PFHS panels have inconsequential increase in weight but appreciably improved their structural performance.

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Structural performance of metallic sandwich panels with square honeycomb cores

The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics ◽

10.1080/14786430500073945 ◽

2005 ◽

Vol 85 (26-27) ◽

pp. 3207-3234 ◽

Cited By ~ 50

Author(s):

F. W. Zok * ◽

H. Rathbun ◽

M. He ◽

E. Ferri ◽

C. Mercer ◽

...

Keyword(s):

Sandwich Panels ◽

Structural Performance ◽

Honeycomb Cores

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Dissemination and Planned Demonstrator of New Precast Concrete Sandwich Panels

Proceedings ◽

10.3390/proceedings2151152 ◽

2018 ◽

Vol 2 (15) ◽

pp. 1152

Author(s):

Aidan Reilly ◽

Richard O'Hegarty ◽

Oliver Kinnane

Keyword(s):

Thermal Performance ◽

Precast Concrete ◽

Sandwich Panels ◽

National Standards ◽

Structural Performance ◽

Small Scale ◽

Thermal Testing ◽

Bending Tests ◽

The Uk ◽

Better Than

This paper presents work developing thin precast concrete sandwich panels for recladding and overcladding applications. These panels are designed for the retrofit of precast concrete structures where the underlying frame is structurally sound. Structural and thermal testing has been carried out to validate the performance of the panels. The panels are designed to have thermal performance better than current national standards, and this has been verified through hot-box testing of components and small-scale panels. Structural performance of the panels has been tested with 3 point bending tests on full-scale panels. Work is in progress towards demonstration of the panels on an occupied building in the UK.

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Vibration and damping characteristics of hybrid carbon fiber composite pyramidal truss sandwich panels with viscoelastic layers

Composite Structures ◽

10.1016/j.compstruct.2013.07.015 ◽

2013 ◽

Vol 106 ◽

pp. 570-580 ◽

Cited By ~ 67

Author(s):

Jinshui Yang ◽

Jian Xiong ◽

Li Ma ◽

Bing Wang ◽

Guoqi Zhang ◽

...

Keyword(s):

Carbon Fiber ◽

Fiber Composite ◽

Sandwich Panels ◽

Carbon Fiber Composite ◽

Damping Characteristics ◽

Pyramidal Truss ◽

Viscoelastic Layers ◽

Hybrid Carbon

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Equivalent properties of composite sandwich panels with honeycomb–grid hybrid core

Journal of Sandwich Structures & Materials ◽

10.1177/1099636218789615 ◽

2018 ◽

Vol 22 (6) ◽

pp. 1859-1878 ◽

Cited By ~ 1

Author(s):

Shanshan Shi ◽

Bingzhi Chen ◽

Zhi Sun

Keyword(s):

Carbon Fiber ◽

Sandwich Panels ◽

Structural Performance ◽

Manufacturing Cost ◽

Equivalent Stiffness ◽

Grid Spacing ◽

Composite Sandwich Panels ◽

Composite Sandwich ◽

Stiffness Model ◽

Core Height

Combining the complementary properties of honeycomb cores and grid cores, a composite sandwich panel with honeycomb–grid hybrid core was proposed to enhance the structural performance of composite sandwich panels. However, important gaps remain in calculating the structural performance of the composite sandwich panels. In this paper, an equivalent stiffness model was proposed to analytically estimate the stiffness matrix of composite sandwich panels with honeycomb–grid hybrid core. The reliability and accuracy of the equivalent stiffness model were verified by experimental measurements from three-point bending tests. Furthermore, the effects of face-sheet thickness, core height, grid spacing, rib width and material properties on structural stiffness were investigated for the design of sandwich structures with hybrid core. The parameter studies demonstrated that core height had the most significant influence on the specific bending stiffness, while grid spacing was most important for specific in-plane stiffness of sandwich panels with carbon-fiber grid. Moreover, using carbon-fiber grid, although increases manufacturing cost, could further enhance the specific stiffness.

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Vibrations of Sandwich Panels with Pyramidal Truss Cores

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.33-37.1233 ◽

2008 ◽

Vol 33-37 ◽

pp. 1233-1240

Author(s):

Hua Rui Liu ◽

Q.H. Xu ◽

J.L. Yang

Keyword(s):

Dynamic Response ◽

Sandwich Panel ◽

Sandwich Panels ◽

Equal Mass ◽

Governing Equations ◽

Hamilton Principle ◽

Pyramidal Truss

This paper is disserted to the vibrations of the sandwich panels with pyramidal truss cores. Firstly, based on the Hamilton principle the governing equations of a sandwich panel with pyramidal truss cores are obtained and the eigenfrequencies of the sandwich panel is studied. Then the dynamic response of the sandwich subjected to uniformly distributed sinusoidal loading is studied. The influences of the sizes of the panel on the eigenfrequencies of the panel are discussed. The maximum deflections of the panels of equal mass subjected to the same loading are compared.

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