Post-fire mechanical properties of sandwich composite structures

Article

Anjang, A., Chevali, V. S., Lattimer, B. Y., Case, S. W., Feih, S. and Mouritz, A. P.. 2015. "Post-fire mechanical properties of sandwich composite structures." Composite Structures. 132, pp. 1019-1028. https://doi.org/10.1016/j.compstruct.2015.07.009
Article Title

Post-fire mechanical properties of sandwich composite structures

ERA Journal ID3731
Article CategoryArticle
AuthorsAnjang, A. (Author), Chevali, V. S. (Author), Lattimer, B. Y. (Author), Case, S. W. (Author), Feih, S. (Author) and Mouritz, A. P. (Author)
Journal TitleComposite Structures
Journal Citation132, pp. 1019-1028
Number of Pages10
Year2015
PublisherElsevier
Place of PublicationUnited Kingdom
ISSN0263-8223
1879-1085
Digital Object Identifier (DOI)https://doi.org/10.1016/j.compstruct.2015.07.009
Web Address (URL)http://www.sciencedirect.com/science/article/pii/S0263822315005516
Abstract

A thermal–mechanical model for calculating the residual stiffness and strength of fire-exposed sandwich composite structures is presented. The model computes the unsteady-state heat flow and decomposition of a sandwich composite exposed to one-sided radiant heating representative of a fire scenario. The model also computes the residual tension and compression properties of a fire-exposed sandwich composite at room temperature. The accuracy of the model is assessed using post-fire stiffness and failure stress property data for a sandwich composite beam consisting of face skins of E-glass/vinyl ester laminate and a core of balsa wood. Experimental testing reveals that the residual tension and compression properties of the sandwich composite decrease rapidly due mainly to thermal decomposition to the fire-exposed skin. It is demonstrated that the model can accurately predict the residual stiffness and strength properties of fire-exposed sandwich composites. The model reveals that the post-fire tension properties are controlled by char damage to the entire sandwich composite whereas the post-fire compression properties are only dependent on charring to the front skin, resulting in a more rapid loss in stiffness and strength than the tension properties.

Keywordssandwich composite; fire; modelling; damage; mechanical properties
Contains Sensitive ContentDoes not contain sensitive content
ANZSRC Field of Research 2020401602. Composite and hybrid materials
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Institution of OriginUniversity of Southern Queensland
Byline AffiliationsRoyal Melbourne Institute of Technology (RMIT)
Virginia Tech, United States
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