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Optimal plastic design of stiffened shells
International Journal of Solids and Structures, 1983Abstract This paper is concerned with the variational formulation of the optimum design of plastic cylindrical shells with stepwise varying thickness and stiffeners at joints (sections between two contiguous elements). The optimality criterion is attained by using a variational formulation. The saving achieved by using stiffeners is shown by means of
CINQUINI, CARLO, Kouam M.
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Engineering Journal, 1964
The design of ever larger clear span roofs is a challenge to structural engineers, architects, fabricators and steel producers. The type of roof proposed in this paper is a thin steel shell that is either reinforced with stiffeners or is made of two thin shells that form a double or "sandwich" shell.
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The design of ever larger clear span roofs is a challenge to structural engineers, architects, fabricators and steel producers. The type of roof proposed in this paper is a thin steel shell that is either reinforced with stiffeners or is made of two thin shells that form a double or "sandwich" shell.
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Optimization of ring stiffened cylindrical shells
AIAA Journal, 1975This paper deals with the optimum structural design of circular cylindrical shells reinforced with identical uniformly spaced T-ring stiffeners, and subjected to external pressure loading. The optimization problems considered are of three types: 1) minimum-weigh t design, 2) design for maximum separation of the lowest two natural frequencies, and 3 ...
Bronowicki, Allen J. +3 more
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Stability of cylindrical shells with spiral stiffening
Strength of Materials, 1990A method of numerical calculation for stability of imperfect cylindrical shells with spiral ribs under a nonuniform subcritical state is presented. The relative effectiveness of spiral, vis-a-vis frame, stiffening is estimated (with equal mass of ribs).
G. D. Gavrilenko, V. I. Matsner
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Stiffened Saddle Shell with Cutout
2016In this chapter, free vibration characteristics of laminated composite stiffened saddle shells with cutouts are studied using finite element method employing eight-noded curved quadratic isoparametric element for shell with a three-noded curved beam element for stiffener.
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On the buckling of stiffened imperfect cylindrical shells
AIAA Journal, 1976A theoretical investigation of the buckling behavior of imperfect ring and stringer stiffened shells under axial compression was carried out. The nonlinear Donnell-type equations for imperfect shells with "smeared out" ring and stringer stiffeners have been reduced to an equivalent set of nonlinear ordinary differential equations.
Arbocz, J., Sechler, E. E.
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Stiffened Conoidal Shell with Cutout
2016Analysis of natural frequency and mode shape of a stiffened composite conoidal shell with cutout is done with the help of finite element method. Dynamic characteristics of stiffened composite conoidal shells with cutout are analysed for varying size of the cutouts and their positions with respect to the shell centre for different boundary conditions of
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Stiffened Cylindrical Shell with Cutout
2016Cylindrical shell panels made of laminated composites with cutout are investigated for free vibration behaviour. Finite element model is used for studying the dynamic behaviour of stiffened shells using eight-noded curved quadratic isoparametric element for shell and a three-noded beam element for stiffener. Size of the cutouts and their positions with
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Analysis of Eccentrically Stiffened Cylindrical Shells
Journal of the Structural Division, 1972A circular cylindrical finite element is combined with beam elements to provide an efficient numerical method for the solution of stiffened shell problems. The analysis includes the transformation relations necessary to account for eccentricity of the stiffening or support members or both.
Peter C. Kohnke, William C. Schnobrich
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