%0 Journal Article
%T Interlaminar stress analysis of multilayered composites based on the Hu
%A Chen Wanji
%A Wu Zhen
%J Journal of Composite Materials
%@ 1530-793X
%D 2018
%R 10.1177/0021998317733532
%X Up to date, accurate prediction of interlaminar stresses is still a challenging issue for two-node beam elements. The postprocessing approaches by integrating the three-dimensional equilibrium equation have to be used to obtain improved transverse shear stresses, whereas the equilibrium approach requires the first-order derivatives of in-plane stresses. In-plane stresses within two-node beam element are constant, so the first-derivatives of in-plane stresses are close to zero. Thus, two-node beam elements encounter difficulties for accurate prediction of transverse shear stresses by the constitutive equation or the equilibrium equation, so a robust two-node beam element is expected. A two-node beam element in terms of the global higher-order zig-zag model is firstly developed by employing the three-field Hu-Washizu mixed variational principle. By studying the effects of different boundary conditions, stacking sequence and loading on interlaminar stresses of multilayered composite beams, it is shown that the proposed two-node beam element yields more accurate results with lesser computational cost compared to various higher-order models. It is more important that accurate transverse shear stress has active impact on displacements and in-plane stresses of multilayered composite beams
%K Global higher-order zig-zag model
%K two-node beam element
%K transverse shear stress
%K three-field Hu-Washizu mixed variational principle
%K multilayered composites
%U https://journals.sagepub.com/doi/full/10.1177/0021998317733532