Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6749666 | Journal of Building Engineering | 2018 | 9 Pages |
Abstract
This paper presents an experimental study on the behavior of sandwich beams made of green materials for both core and skin components. A unidirectional flax fabric and a partial bio-based epoxy were used to make fiber-reinforced polymer (FRP) skins and three flute varieties of corrugated cardboards (known as B, C, and BC flutes) with the bulk densities of 170, 127, and 138â¯kg/m3 were used for the core, respectively. A total of 30 small-scale sandwich beam specimens were manufactured across six unique beam varieties with dimensions of 50â¯mm in width, 25â¯mm in depth, and 200 and 350â¯mm in length (150â¯mm and 300â¯mm spans) and tested under four-point bending up to failure. Two failure modes of transverse indentation for the short specimens and longitudinal crushing of the core and skin for the long specimens were observed. The load-deflection, load-strain, and moment-curvature behaviors were analyzed to evaluate the strength and stiffness of the sandwich beam specimens. C flute with the lowest bulk density and the highest availability in the market amongst all the three flutes exhibited the highest strength and stiffness for sandwich applications. Overall, the corrugated cardboard cores combining with the flax FRP skins may be considered as a viable, green option for the fabrication of large-scale structural sandwich panels for building applications.
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Authors
Aidan McCracken, Pedram Sadeghian,