A higher-order shear-deformation theory, assuming a non-linear variation for the displacement field, is used to develop a finite-element model to predict the linear buckling behaviour of anisotropic multilaminated or sandwich thick and thin beams. The model is based on a single-layer Lagrangean four-node straight-beam element. It considers stretching and bending in two orthogonal planes. The most common cross-sections and symmetric and asymmetric lay-ups are studied. The good performance of the present element is evident on the prediction of the buckling of several test cases of thin and thick isotropic or anisotropic beam structures. Comparisons show that the model is accurate and versatile.
展开▼
