Are Higher-Order Theories and Layer-wise Zig-Zag Theories Necessary for N-Layer Composite Laminates?
Qifeng Fan1, Yaping Zhang2, Leiting Dong1,3, Shu Li1, Satya N. Atluri4
CMES-Computer Modeling in Engineering & Sciences, Vol.107, No.2, pp. 155-186, 2015, DOI:10.3970/cmes.2015.107.155
Abstract Although “higher-order” and layer-wise “higher-order” plate and shell
theories for composite laminates are widely popularized in the current literature,
they involve (1) postulating very complex assumptions of plate/shell kinematics in
the thickness direction, (2) defining generalized variables of displacements, strains,
and stresses, and (3) developing very complex governing equilibrium, compatibility,
and constitutive equations in terms of newly-defined generalized kinemaic and
generalized kinetic variables. Their industrial applications are thus hindered by
their inherent complexity, and the fact that it is difficult for end-users (front-line
structural engineers) to completely understand all the newly-defined FEM DOFs
in higher-order and layer-wise theories. In an… More >
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