A numerical study on improving the specific properties of staggered composites by incorporating voids

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DOIResolve DOI: http://doi.org/10.1016/j.mtcomm.2017.09.011
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TypeArticle
Journal titleMaterials Today Communications
ISSN2352-4928
Volume13
Pages144154
Subjectbio-inspiration; staggered composites; void; finite element analysis; specific properties; nanocomposites
AbstractDespite being porous, natural materials such as bone, nacre and tooth enamel possess interesting combinations of stiffness, strength and toughness, an outstanding performance which is hard to achieve in engineering materials. Recent studies show that this performance is rooted in their architectures in which stiff and strong inclusions are arranged in a staggered structure and placed within a softer matrix. These studies however focus on void-free staggered composites. Here, we use finite element analysis and exhaustive exploration of the design space to show that the specific modulus and yield strength of staggered composites can be improved by removing the non-load bearing regions of the matrix material and to show the morphologies emerging from this process. This improvement increases with aspect ratio of the inclusions and with mismatch of properties between the phases and decreases with inclusion content. Particularly, 20–30% increase in the specific modulus and 10–20% increase in specific yield strength can be achieved considering the actual properties of carbon nanotube (or ceramic/mineral platelet) reinforced polymers. The morphologies emerging from our exploration can be used to develop lightweight composites of interest in aerospace, defence, and packaging industries.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationAerospace; National Research Council Canada
Peer reviewedYes
NPARC number23002357
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Record identifier0188e04f-e73d-4a03-a745-e9a01550c95d
Record created2017-10-23
Record modified2017-10-23
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