Natural cork and its agglomerates as substitutes for high-density expanded polystyrene foams in sandwich cores
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Abstract
Natural cork (NC) and its agglomerates are renewable materials that could be effective substitutes for non-renewable foams, such as expanded polystyrene (EPS), in the cores of sandwich materials. Although many existing studies have analysed the behaviour of different cork agglomerates under tensile, compression, or shear loads, no studies to date have simultaneously analysed the behaviour of multiple cork materials under all these loads. Therefore, in this study, the behaviour of NC and five cork agglomerates were analysed under tensile, compression and shear loads, and the mechanical and specific properties and the shape of the stress–strain curves were compared with those obtained for five EPS counterparts to analyse the relationship between the mechanical behaviour of the core and the main failure modes of the sandwich. Although EPS exhibited higher specific properties, NC exhibited higher mechanical properties under all the loads. The agglomerates all exhibited lower mechanical properties except for shear strain. Additionally, because no specific standards were available for testing cork products, slightly modified standards for testing other materials were adopted.
Funding source: “Ibercaja Foundation” Young Research Grant
Funding source: IberDoD HBCU/MI Basic Research Grant
Award Identifier / Grant number: JIUZ-2018-TEC-09
Funding source: University of Zaragoza
Funding source: ID-ERGO
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Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
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Research funding: This work was supported by the “Ibercaja Foundation” Young Research Grant, IberDoD HBCU/MI Basic Research Grant (grant no. JIUZ-2018-TEC-09), the University of Zaragoza (Spain) and the research group ID-ERGO.
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Conflict of interest statement: The authors declare no conflicts of interest regarding this article.
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Supplementary Material
The online version of this article offers supplementary material (https://doi.org/10.1515/hf-2021-0004).
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Articles in the same Issue
- Frontmatter
- Original Articles
- Variations in heartwood formation and wood density as a function of age and plant spacing in a fast-growing eucalyptus plantation
- On-line characterization of wood chip brightness and chemical composition by means of visible and near-infrared spectroscopy
- Extractives in Betula celtiberica stemwood and isolation and identification of diarylheptanoids in the hydrophilic extract
- High recovery of stilbene glucosides by acetone extraction of fresh inner bark of Norway spruce
- Natural cork and its agglomerates as substitutes for high-density expanded polystyrene foams in sandwich cores
- Understanding the thermal durability of wood-based composites (WBCs) using crack propagation fracture toughness
- Evaluation of changes in cellulose micro/nanofibrils structure under chemical and enzymatic pre-treatments
- Multi-scale evaluation of the effect of saturated steam on the micromechanical properties of Moso bamboo
- Short Note
- Wood modification with N-methylol and N-methyl compounds: a case study on how non-fixated chemicals in modified wood may affect the classification of their durability
