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Computer Aided Design Environment for Composites (CADEC) 14.1.6392.14245

Software Support for Introduction to Composite Materials Design-- 2nd Edition, CRC (2011) by Ever J. Barbero

Micromechanics--Unidirectional--In-plane Poisson's ratio

The in-plane Poisson's ratio represents the amount of transverse strain caused by an applied axial strain. In other words, it helps calculate how much a material will shrink in the direction perpendicular to the direction of stretching. Poisson's effect can be visualized easily by stretching a rubber band and observing how the thickness/width decreases. In-plane means that the stretching and consequent perpendicular shrinking are observed on the plane, or surface, of the composite plate or shell. In-plane Poisson's ratio can be predicted using different methods, with varying degree of complexity and accuracy. These methods can be accessed from this page, including:

  • Rule of mixtures (very good for predicting in-plane Poisson's ratio)
  • Periodic microstructure method (excellent for predicting all the elastic properties)

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