A simple spline finite strip for buckling analysis of composite cylindrical panel with cutout

Abstract

In this study, a new sub-parametric strip element is developed to simulate the axially loaded composite cylindrical panel with arbitrary cutout. For this purpose, a code called SSFSM is developed in FORTRAN to analyze the buckling of panels. The first order shear deformation theory is used to form the straindisplacement relations. Spline and Lagrangian functions are used to derive element shape functions in the longitudinal and transverse directions, respectively. The computational cost of the SSFSM is decreased dramatically, as mapping functions of the strip element are very simple. The results obtained from the SSFSM are compared with those of the literature and the results obtained by ABAQUS to show the validity of the proposed approach. A parametric study is performed to show the capability of the SSFSM in calculating the panel buckling load. Results indicate that increasing the panel thickness and panel central angles cause an increase in panel buckling load. The cutout shape is an important factor influencing the panel buckling load. For instance, when the angle between the direction of big chord of the elliptical cutout and compressive load direction are 0 and 90 degrees, the panel buckling load reaches its minimum and maximum magnitude, respectively.

Buckling behavior of laminated composite stiffened cylindrical shell panels having cutout for different parametric variations

“…Comparison of buckling load of the cylindrical panel with cutout for layup (θ/-θ)4 obtained from ABAQUS, SSFSM 16 , and present model. where d sx and d sy are depth of x-stiffener and y-stiffener, respectively.…”

“…700 elements of type S8R5 were used to model the panel in ABAQUS. The same panel was modeled by Poorveis et al 16 in the SSFSM with 10 strip elements and 20 knots. The panel is simulated by the present finite element code roughly by 13,385 degrees of freedom.…”

“…Using the FEM and artificial neural network, hat-stiffened panels were analyzed. 15 Poorveis et al 16 developed a new sub-parametric spline finite strip method (SSFSM) to analyze axially loaded composite cylindrical panel having cutout. Mouhat et al 17 used ABAQUS software for non-linear buckling analysis of stiffened composite panels having various ply orientations.…”

Buckling characteristics of cut-out borne composite stiffened hyperbolic paraboloid shell panel

“…Anish et al 47 used improved shear deformation theory for analyzing biaxial buckling of composite plate with cut-out. Poorveis et al 48 used sub-parametric strip element method for analysis of composite cylindrical panel with cut-out. Mouhat et al 49 used nonlinear finite element modeling to consider the effect of ply orientation on nonlinear buckling of composite stiffened panel.…”

A conjugate modal force strategy for instability analysis of thin-walled structures: an unconstrained vector positional finite element approach

“…Bebiano et al (2015) rationalize and automate the GBT strategy creating bases for software configurations. These methods, applied in instability analysis, received a lot of contributions in the last years, as for example, Silvestre et al (2019), Basaglia et al (2019) and Manta et al (2020) for GBT and Mirzaei et al (2015), Poorveis et al (2019) and Shahmohammadi et al (2019) for FSM. Some interesting works using classical Finite Element Method (FEM) and solving stability problems may be cited (Mororo et al, 2015;Pastor and Roure, 2009;Ren et al, 2006).…”