Modulus of short carbon and glass fiber reinforced composites

Abstract

A theoretical model for a short fiber reinforced composite is proposed. The composite is assumed to consist of an aggregate of sub‐units, each sub‐unit possessing the elastic properties of a reinforced composite in which the fibers are continuous and fully aligned. The elastic constants of a partially oriented composite are then calculated by the Voigt and Reuss averaging procedures, giving upper and lower bounds respectively for the composite modulus. Comparison is made with experimental data for such composites. The measured modulus of glass and carbon fiber composites is found to be given by the Reuss or lower bound, to a good approximation compared with the difference between the bounds, for fiber orientations ranging from almost isotropic to highly aligned.

The incorporation of carbon nanofibres to enhance the properties of self reinforced, single polymer composites

“…[20,21]). Following our previous collaborative research with ETH Zurich [22,23], the chosen modelling strategy is one of two stages: first, predict the properties of a fully aligned short fibre composite unit using the treatment of Qui and Weng [24] and then to regard the actual composite as a partially aligned aggregate of these units [25,26] assuming uniform strain. Determining values for the elastic constants of the CNF is a key issue about which there has been considerable discussion in the literature for the different forms of carbon nanotubes that are available (CNF, and multi and single walled nanotubes).…”

A Review of Natural Fibers Used in Biocomposites: Plant, Animal and Regenerated Cellulose Fibers

“…Synthetic fibers such as carbon/glass are reinforced in polymers to be used in high-performance applications such as automobiles and aircraft industries. [1][2][3] The performance of these composites was improved continuously through rigorous research, often through mixing of reviewed biocomposites from 2000 to 2010. 11,12 Detailed review about biocomposites, mostly from bast and leaf fibers, and their properties until 2010 have been discussed in the above-mentioned two papers.…”

3D confocal microscopy of glass fibre-reinforced composites

“…The Polymer Group at Leeds has been conducting experiments with glass ®brereinforced polyoxymethylene (POM) since about 1970 (see for example Brody and Ward [67]). Deformation models have been evaluated, for example an aggregate version of the pseudoaf®ne model (Hope et al [68]), which relate the ®bre orientation distribution in an initial billet of material to the ®bre orientation distribution after hydrostatic extrusion and thence to predictions of the 3D elastic moduli (Hine and co-workers [69,70]).…”