Modelling of elastic constants of plasma spray deposits with ellipsoid-shaped voids

The five independent elastic constants of plasma spray deposits were calcul ated from constitutive equations and microstructural information (void aspe ct ratios and porosity) was gained from stereological analysis. The voids w ithin the deposit were assumed to be eilipsoidal in shape. Thee structure o f the deposit was considered to be transversely isotropic with respect to t he spray direction, which requires five independent elastic constants of a stiffness tensor. Solid mechanics models containing ellipsoid-shaped voids were applied to obtain the five independent elastic constants of the deposi ts. The calculated elastic constants were compared to the experimentally de termined values. (C) 1999 Acta Metallurgica Inc. Published by Elsevier Scie nce Ltd. All rights reserved.