Composite Laminates with Negative Through-the-Thickness Poisson's Ratios
- 1 September 1984
- journal article
- Published by SAGE Publications in Journal of Composite Materials
- Vol. 18 (5) , 447-455
- https://doi.org/10.1177/002199838401800504
Abstract
A simple analysis using two-dimensional lamination theory combined with the ap propriate three-dimensional anisotropic constitutive equation is presented to show some rather surprising results for the range of values of the through-the-thickness ef fective poisson's ratio vxz for angle-ply laminates. Results for graphite-epoxy show that the through-the-thickness effective poisson's ratio can range from a high of 0.49 for a [90] laminate to a low of -0.21 for a [±25]S laminate. It is shown that negative values of vxz are also possible for other laminates.Keywords
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