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Modelling the effects of negative Poisson's ratios in continuous-fibre composites

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Abstract

Finite-element methods have been used to examine the elastic properties of continuous-fibre reinforced composites. Consideration has been given to the possibilities of using either reinforcing or matrix constituents with large negative Poisson's ratios (with values of −1.0 ⩽v ⩽−0.3). It is shown that a large negative Poisson's ratio can lead directly to considerably enhanced transverse moduli without altering the longitudinal moduli. For example, changing the matrix Poisson's ratio from 0.3 to−0.9 and keeping all other constituent properties constant produces an almost four-fold increase in the composite transverse modulus.

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Nkansah, M.A., Evans, K.E. & Hutchinson, I.J. Modelling the effects of negative Poisson's ratios in continuous-fibre composites. JOURNAL OF MATERIALS SCIENCE 28, 2687–2692 (1993). https://doi.org/10.1007/BF00356204

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