Flexural strength of foam‐filled polymer composite sandwich panel with novel M‐shaped core reinforced by nano‐SiO 2

Computed tomography magnetic resonance imaging has been successfully applied to fully detect typical aircraft hydrogen-rich liquid contaminants entrapped in honeycomb core cells of structural polymer composite sandwich panels. With the aid of Bayesian-based image processing toolbox, the quantification, identification, and discrimination of the contaminants were also rapidly accomplished. Computed tomography magnetic resonance imaging has also been auspiciously applied to accurately define the extent of crushed-core damage in liquid impregnated honeycomb cells. Presented results strengthen the potential of magnetic resonance imaging as safe, fast, reliable, and user-friendly nondestructive testing technique to all engineering fields employing composite sandwich panels as high-demanding structural members.

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Development of an Innovative Modular Foam-Filled Panelized System for Rapidly Assembled Postdisaster Housing

Buildings ◽

10.3390/buildings8080097 ◽

2018 ◽

Vol 8 (8) ◽

pp. 97 ◽

Cited By ~ 4

Author(s):

P. Sharafi ◽

S. Nemati ◽

B. Samali ◽

M. Ghodrat

Keyword(s):

Sandwich Panel ◽

High Density ◽

Building Construction ◽

Structural Performance ◽

Modular Construction ◽

Structural Walls ◽

Pu Foam ◽

Load Carrying ◽

Foam Filled ◽

American Society

In this paper, the development process of a deployable modular sandwich panelized system for rapid-assembly building construction is presented, and its structural performance under some different action effects is investigated. This system, which includes an innovative sandwich panel and its integrated connections, can be used as structural walls and floors in quickly-assembled postdisaster housing, as well as load-bearing panels for prefabricated modular construction and semipermanent buildings. Panels and connections are composed of a pneumatic fabric formwork, and two 3D high-density polyethylene (HDPE) sheets as the skins, filled with high-density rigid polyurethane (PU) foam as the core. HDPE sheets manufactured with a studded surface considerably enhance stress distribution, buckling performance, and delamination strength of the sandwich panel under various loading conditions. The load-carrying behavior of the system in accordance with some American Society for Testing and Materials (ASTM) standards is presented here. The results show the system satisfies the codes’ criteria regarding semipermanent housing.

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Bending and free vibration analysis of foam-filled truss core sandwich panel

Journal of Sandwich Structures & Materials ◽

10.1177/1099636216670612 ◽

2016 ◽

Vol 20 (5) ◽

pp. 617-638 ◽

Cited By ~ 11

Author(s):

MP Arunkumar ◽

Jeyaraj Pitchaimani ◽

KV Gangadharan

Keyword(s):

Free Vibration ◽

Vibration Analysis ◽

Sandwich Panel ◽

Closed Form Solution ◽

Free Vibration Analysis ◽

Element Model ◽

Form Solution ◽

Numerical Comparison ◽

Truss Core ◽

Foam Filled

This paper presents the studies carried out on bending and free vibration behavior of truss core sandwich panel filled with foam typically used in aerospace applications. Equivalent stiffness properties for foam-filled truss core sandwich panel are derived by idealizing 3D foam-filled sandwich panel to an equivalent 2D orthotropic thick plate continuum. The accuracy of the derived elastic property is ensured by the numerical comparison of free vibration response of 3D and its equivalent 2D finite element model. The derived stiffness constants were used in closed form solution to evaluate the maximum deflection of the continuum. The results show that the free vibration and static behavior of the sandwich panel can be enhanced in due consideration to the space constraint by filling foam in the empty space of core. The results also reveal that triangular core foam-filled sandwich panel deflects less compared to other cores. From the free vibration analysis, effect of filling foam is effective in cellular and trapezoidal core.

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