Isogeometric stiffness matrix formulations for buckling analysis of multi-layered shells based on lamination parameters for solid-shell elements

Abstract Multi-layered composite shells are extensively used in many industrial fields since they have superior performance applications. As load-carrying components, buckling failure is one of the most common modes multi-layered shells. Hence, layup design based on optimal factors widely concerned, where lamination parameters commonly representation stiffness. However, formulations laminate stiffness Classical Laminate Plate Theory (CLT) or First-order Shear Deformation (FSDT). This paper aims at developing 3D continuum solid theory. The accuracy and efficiency derived this study analysed compared to those obtained by layer-by-layer integration summation calculations.