Local Buckling of Composite Laminated Plate Assemblies Using the Spline Finite Strip Method

Abstract

An analysis of the local buckling of composite laminated plates and folded plate assemblies subjected to arbitrary loading is presented. The analysis uses the spline finite strip method, which utilises B3-spline functions for the longitudinal variation of buckling displacements, and an interpolation of Hermitian polynomials for the buckling displacements in the transverse direction. While the spline finite strip method is fairly well-known in buckling analysis, its direct application to the local buckling of composite laminates has been more limited. The method is programmed to study the local buckling of laminated flat plates and L-sections. Examples of the accuracy of the method compared with independent studies, and the influence of increasing the number of lengthwise section knots, are presented for plates of finite length that are subjected to compression, bending and shear.

Local Buckling of Rectangular Viscoelastic Composite Plates Using Finite Strip Method

“…It is worth noting that although buckling analysis of viscoelastic composite plates with variable thickness can be performed for nearly any thick plate configuration using the finite element method, the finite strip method provides more efficient formulations for plate structures under different load conditions [13,14] since the number of degrees of freedom significantly decreases. In other words, when the finite element method is employed for analysis of local buckling of a moderately thick plate, in order to consider the strain produced by transverse shear, a rectangular plate element with 20 degrees of freedom, including 3 bending and 2 shear degrees of freedom at each corner, is required while in the proposed finite strip method each strip is modeled by 5 degrees of freedom at each nodal line.…”

Finite Strip Method For Fixed Ended Plates

“…The global equations are derived in the usual manner of the finite element method and natural frequencies of vibration can be found by solution a linear Eigen values problem. Azhari et al [7], presented an analysis of the local buckling of composite laminated plates and folded plate assemblies subjected to arbitrary loading using the spline finite strip method. Because the spline finite strip method is fairly well-known in buckling analysis, its direct application to the local buckling of composite laminates has been more limited.…”

Critical strain for a locally elliptical delamination near the surface of a cylindrical laminated shell under hydrothermal effects

“…Ref. [3] studied, by making use of a spline finite strip method, the local buckling of composite laminated plates and folded plates subjected to mechanical loads. A computationally efficient alternative to the finite element method for the initial buckling analysis of long, shear-deformable composite was presented in the literature [4].…”