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Composite materials with enhanced dimensionless Young's modulus and desired Poisson's ratio.

Zhu HX, Fan TX, Zhang D - Sci Rep (2015)

Bottom Line: We have designed a new type of composite materials which not only has a Young's modulus much larger than the Voigt limit, but also is always nearly isotropic.Moreover, its Poisson's ratio can be designed at a desired value, e.g. positive, or negative, or zero.The results obtained in this paper provide a very useful insight into the development of new functional materials and structures.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering, Cardiff University, Cardiff, CF24 3AA, UK.

ABSTRACT
We have designed a new type of composite materials which not only has a Young's modulus much larger than the Voigt limit, but also is always nearly isotropic. Moreover, its Poisson's ratio can be designed at a desired value, e.g. positive, or negative, or zero. We have also demonstrated that structural hierarchy can help to enhance the stiffness of this type of composite materials. The results obtained in this paper provide a very useful insight into the development of new functional materials and structures.

No MeSH data available.


Related in: MedlinePlus

Bottom-up structure of hierarchical composites.
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f5: Bottom-up structure of hierarchical composites.

Mentions: Now we demonstrate how structure hierarchy could further enhance the elastic properties of a two-phase composite material. The two-phase hierarchical composite material is assumed to be made of isotropic materials A and B with Young’s moduli EA and EB, Poisson ratios vA and vB, and volume fraction fB. At each hierarchical level n, the composite material is assumed to be composed of a large number of identical RVEs, as shown in Fig. 5, and each of the cubic fillers/inclusions (i.e. equivalent to material ‘B’ in Fig. 1) in the RVEs is also made of a large number of identical lower level (i.e. level n − 1) cubic periodic RVEs. For simplicity, the hierarchical composite material is assumed to be self-similar in structure, and the volume fraction of the cubic fillers/inclusions (i.e. material ‘B’ ) in the RVEs is assumed to remain fixed at all hierarchical levels21,


Composite materials with enhanced dimensionless Young's modulus and desired Poisson's ratio.

Zhu HX, Fan TX, Zhang D - Sci Rep (2015)

Bottom-up structure of hierarchical composites.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4566127&req=5

f5: Bottom-up structure of hierarchical composites.
Mentions: Now we demonstrate how structure hierarchy could further enhance the elastic properties of a two-phase composite material. The two-phase hierarchical composite material is assumed to be made of isotropic materials A and B with Young’s moduli EA and EB, Poisson ratios vA and vB, and volume fraction fB. At each hierarchical level n, the composite material is assumed to be composed of a large number of identical RVEs, as shown in Fig. 5, and each of the cubic fillers/inclusions (i.e. equivalent to material ‘B’ in Fig. 1) in the RVEs is also made of a large number of identical lower level (i.e. level n − 1) cubic periodic RVEs. For simplicity, the hierarchical composite material is assumed to be self-similar in structure, and the volume fraction of the cubic fillers/inclusions (i.e. material ‘B’ ) in the RVEs is assumed to remain fixed at all hierarchical levels21,

Bottom Line: We have designed a new type of composite materials which not only has a Young's modulus much larger than the Voigt limit, but also is always nearly isotropic.Moreover, its Poisson's ratio can be designed at a desired value, e.g. positive, or negative, or zero.The results obtained in this paper provide a very useful insight into the development of new functional materials and structures.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering, Cardiff University, Cardiff, CF24 3AA, UK.

ABSTRACT
We have designed a new type of composite materials which not only has a Young's modulus much larger than the Voigt limit, but also is always nearly isotropic. Moreover, its Poisson's ratio can be designed at a desired value, e.g. positive, or negative, or zero. We have also demonstrated that structural hierarchy can help to enhance the stiffness of this type of composite materials. The results obtained in this paper provide a very useful insight into the development of new functional materials and structures.

No MeSH data available.


Related in: MedlinePlus