Analysis of the compression behaviour of different composite lattice designs

Article


Umer, R., Barsoum, Z., Jishi, H. Z., Ushijima, K. and Cantwell, W. J.. 2018. "Analysis of the compression behaviour of different composite lattice designs." Journal of Composite Materials. 52 (6), pp. 715-729. https://doi.org/10.1177/0021998317714531
Article Title

Analysis of the compression behaviour of different composite lattice designs

ERA Journal ID4918
Article CategoryArticle
AuthorsUmer, R. (Author), Barsoum, Z. (Author), Jishi, H. Z. (Author), Ushijima, K. (Author) and Cantwell, W. J. (Author)
Journal TitleJournal of Composite Materials
Journal Citation52 (6), pp. 715-729
Number of Pages15
Year2018
PublisherSAGE Publications Ltd
Place of PublicationUnited Kingdom
ISSN0021-9983
1530-793X
Digital Object Identifier (DOI)https://doi.org/10.1177/0021998317714531
Web Address (URL)http://journals.sagepub.com/doi/abs/10.1177/0021998317714531
Abstract

Four all-composite lattice designs were produced using a lost-mould procedure that involved inserting carbon fibre tows through holes in a core. Following resin infusion and curing, samples were heated to melt the core, leaving well-defined lattice structures based on what are termed BCC, BCCz, FCC and F2BCC designs. Analytical and numerical models for predicting the mechanical properties of the four designs are presented and these results are compared with the experimental data from the quasi-static compression tests. Compression tests on the four lattice structures indicated that the F2BCC lattice offered the highest compression strength, although when normalized by relative density, the BCCz lattice structure out-performed other structures. Similarly, the specific compression strengths were found to be superior to those of more traditional core materials. A number of failure mechanisms were also highlighted, including strut buckling, fracture at the strut-skin joints and debonding of reinforcing members at the central nodes. Finally, it is believed that the properties of these lattices can be further increased using higher fibre volume fractions.

KeywordsLattice structures, sandwich cores, compression, lightweight structures
ANZSRC Field of Research 2020401602. Composite and hybrid materials
Institution of OriginUniversity of Southern Queensland
Byline AffiliationsCentre for Future Materials
KTH Royal Institute of Technology, Sweden
Khalifa University, United Arab Emirates
Tokyo University of Science, Japan
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