Abstract
In this paper, an accurate and efficient C0-type third-order global–local model incorporating effects of the transverse normal strain is proposed to study the thermal/mechanical behaviors of thick multilayer cross-ply plates. Transverse displacement is assumed to be a linear distribution through the thickness direction, for which the normal strain could be readily computed. Based on the interlaminar continuity conditions of in-plane displacement and transverse shear stresses, layer-dependent variables could be reduced. Employing shear stress free condition at the upper and the lower surfaces, derivatives of transverse displacement are eliminated from the displacement field, so that C0 interpolation functions are only required for the finite element implementation. As a result, the number of variables is independent of the number of layers of the laminate. To assess the proposed model, the classical quadratic eight-node isoparametric element is used for the interpolation of all the displacement parameters defined at each nodal point on the composite plate. Comparing with various existing composite plate models, it is found that simple C0 finite elements with non-zero normal strain could produce accurate deformations and stresses of thick multilayer composite plates subjected to thermal and mechanical loads.
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Lo, S.H., Zhen, W., Sze, K.Y. et al. C0-type global–local theory with non-zero normal strain for the analysis of thick multilayer composite plates. Comput Mech 47, 479–491 (2011). https://doi.org/10.1007/s00466-010-0554-5
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DOI: https://doi.org/10.1007/s00466-010-0554-5