Flexural and shear performance of an innovative foam-filled sandwich panel with 3-D high density polyethylene skins

Abstract

In this paper, an innovative and efficient sandwich panel is proposed for the structural walls for quickly assembled post-disaster housing, as well as load bearing panels for pre-fabricated modular construction and semi-permanent buildings. This study focuses on the flexural and shear behavior of the innovative sandwich panels, which is composed of two 3-D high density polyethylene (HDPE) skins, and high-density Polyurethane (PU) foam core. An experimental study was carried out to validate the effectiveness of this panel for increasing the ultimate bending strength. A series of experimental tests were performed on medium-scale specimens to characterize their core shear behavior. Then, some supplementary tests were run to determine the panels' flexural and shear stiffness. The numerical and experimental investigations show that the 3-D-HDPE sheets, manufactured with a studded surface; considerably enhance the pull-out and delamination strength. Good agreement has been observed between the numerical and experimental tests.

A review on recent advances in sandwich structures based on polyurethane foam cores

“…A great deal of research in previous years has focused on the flexural performance of PUF sandwich composites under bending loads. Researchers have used different numerical, analytical and experimental techniques to analyze the flexural behavior of PUF sandwich composites and have focused on different parameters and their effects on their flexural performance . One of the most important parameters is the density of the PUF core, which has a great influence on the flexural behavior of sandwich composites.…”

Edgewise and flatwise compressive behaviour of foam-filled sandwich panels with 3-D high density polyethylene skins

“…Table 1 shows the basic mechanical properties of the PU, provided by the manufacturer, and validated in the laboratory. The detailed mechanical behaviour and stress-strain curves are presented in Sharafi et al (2018b). Using uniaxial load machine, three cubic specimens (dimensions: 50mm×50mm×50mm) were tested based on the ASTM E1730 and ASTM D1621 at a loading rate of 5 mm/min in order to identify the structural properties (ASTM-E1730, 2015; ASTM, 2010).…”

Development of an Innovative Modular Foam-Filled Panelised System for Rapidly Assembled Post Disaster Housing<strong> </strong>

“…A perfect bond must be assumed to exist between the core and the facings. The bending stiffness can be computed accounting for the deflection components that are associated with bending and shear deformations [36,37]. This study examined the core shear properties of introduced polyurethane infill-foam composite panels subjected to flexure in such a manner that the applied moments produce curvature of the sandwich facing planes.…”