Abstract
A new discrete Kirchhoff quadrilateral element based on the refined third-order theory is developed for the analysis of composite plates. The element has seven degrees of freedom per node, namely, the three displacements, two rotations and two transverse shear strain components at the mid-surface. The inplane displacements and the shear strains are interpolated using bilinear interpolation functions and the mid-surface rotations are interpolated using bi-quadratic functions based on the discrete Kirchhoff technique. The element stiffness matrix and the consistent load vector are developed using the principle of virtual work. The finite element formulation is validated by comparing the results for simply-supported plate with the analytical Navier solution. Comparison of the present results with those using other available elements based on the TOT establishes the superiority of the present element in respect of simplicity, accuracy and computational efficiency. The element is free from shear locking
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Kulkarni, S.D., Kapuria, S. A new discrete Kirchhoff quadrilateral element based on the third-order theory for composite plates. Comput Mech 39, 237–246 (2007). https://doi.org/10.1007/s00466-005-0020-y
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DOI: https://doi.org/10.1007/s00466-005-0020-y