Sandwich panels for slab applications

Hemming, Steven (2012) Sandwich panels for slab applications. [USQ Project]

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Abstract

This dissertation is a study on sandwich panels for slab applications looking at expanded polystyrene core sandwich panels with various materials for the face. The aim is to
determine the optimum thickness for strength and serviceability of a number of sandwich panels. Finite element analysis using Strand7 and the construction and testing of physical samples were carried out to verify the accuracy of a numerical study.

Four panels were constructed using plywood, oriented strand board, aluminium and steel as the face material and were tested in a SANS material testing machine which measured
applied loading and mid-span deflection. These same panels were modelled using finite element analysis in the Strand7 software package under the same conditions as the laboratory tests. The results were compared and found to be in good agreement between them which confirmed the validity of the computer model. Further study was undertaken
using Strand7 to model the same panels with the application of domestic floor loading as per AS1170.

Three formulas to calculate the optimum core thickness with respect to the panel failure mode were tested however were found to be unsuitable for the loading arrangement of a
uniformly distributed load and a concentrated load. An iterative approach to determining the optimum core thickness was then used. Modelling various thicknesses of the same span panel allowed the optimum core thickness to be determined for that span that would allow the panel to only deflect a maximum of Span/400 or 10 mm. This process was repeated until a span/thickness curve was created that allows the optimum thickness core to be read from the chart for panel spans up to 6 metres.

This research project shows that sandwich panel can be used for slab applications under domestic floor loading. The validity of the Strand7 model has been shown be comparing
physical test results to the computer model. By developing span/thickness charts to optimise the core thickness of the panels allows a panel system to be manufactured that will minimise weight and cost while still satisfying strength and serviceability requirements.


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Item Type: USQ Project
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Supervisors: Lokuge, Weena; Karunasena, Karu
Date Deposited: 22 Jan 2014 00:02
Last Modified: 22 Sep 2017 00:55
Uncontrolled Keywords: slab applications; sandwich panels; thickness; polystyrene;
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
URI: http://eprints.usq.edu.au/id/eprint/23900

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