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

Abstract

The present study investigates buckling characteristics of cut-out borne stiffened hyperbolic paraboloid shell panel made of laminated composites using finite element analysis to evaluate the governing differential equations of global buckling of the structure. The finite element code is validated by solving benchmark problems from literature. Different parametric variations are studied to find the optimum panel buckling load. Laminations, boundary conditions, depth of stiffener and arrangement of stiffeners are found to influence the panel buckling load. Effect of different parameters like cut-out size, shell width to thickness ratio, degree of orthotropy and fiber orientation angle of the composite layers on buckling load are also studied. Parametric and comparative studies are conducted to analyze the buckling strength of composite hyperbolic paraboloid shell panel with cut-out.

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

“…When the element is subjected to a distributed load, the different matrices in equations ( 13) and ( 14) and consistent load vector can be accordingly formed 33 and the detailed expressions are omitted here for brevity.…”

Buckling of laminated composite plate with various shapes of holes under uniform/nonuniform mechanical and thermal loading

“…buckling and post-buckling behaviour of thick plates under uniaxial and biaxial compressive loading. Laminated composite plates with geometrical discontinuities in the form of holes have been considered for buckling response analysis in the past few decades [2][3][4][5][6][7][8][9]. Baba and Baltaci [2] compared their numerical and experimental results for buckling analysis of laminated composite plates with central cutouts and found that the experimental value of buckling load was higher than numerical predicted load owing to the imperfection in the experimental test specimen.…”

“…They found that the plate with cutout can be hard to buckle in comparison of plate without cutout. Sahoo [4] examined the influence of different parameters such as cutout size, thickness ratio, modulus ratio, and fibre angle on the buckling characteristics of stiffened hyperbolic paraboloid shell panels. Mandal and Mishra [5] also examined the buckling behaviour responses of perforated plates subjected to inplane loading.…”