E. Carrera, An assessment of mixed and classical theories on global and local responseof multilayered orthotropic plates, COMP STRUCT, 50(2), 2000, pp. 183-198
This article assesses two-dimensional theories to evaluate global and local
response of orthotropic, multilayered plates. The introductory discussion
outlines five, relevant key-points that should be to be addressed in the mo
deling of multilayered structures. Classical theories formulated on the bas
is of Principle of Virtual Displacements (PVD) and mixed theories based on
the Reissner Mixed Variational Theorem (RMVT) are presented. Theories which
preserve the independence of the number of the independent variables from
the numbers of the N-l-layers (ESLM, Equivalent Single Layer Models) and th
eories in which the number of the unknown variables remains N-l-dependent (
LWM, Layer-Wise Models) are both considered. Modelings related to linear up
-to-fourth order variations of the unknown variables in the thickness direc
tion are treated. Sub-cases have been implemented which permits one to eval
uate explicitly the effect of the so-called zig-zag (ZZ) effect, interlamin
ar continuity (IC) and transverse normal stresses a,. As a result more than
40 theories have been implemented and compared for both local (displacemen
t and stress distribution in the thickness plate direction) and global (mai
nly free vibration) response. A number of conclusions have been outlined in
the numerical part. (C) 2000 Elsevier Science Ltd. All rights reserved.