Strength design model for thin-walled structures

Wang, Z. J.; Kang, Lijun; Kretov, A. S.; Huang, Sh.

doi:10.3103/s1068799816010207

Cited by 3 publications

(1 citation statement)

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“…In Figure 1, picture (a)is the sketch of whole structure; picture (b) is finite element model; picture (c) is one super-element model and picture (d)is the force condition of carrying load elements. For one super-element with n rods and m panels, under the hypothesis of in-plane rigidity [1] , each cross section has 3 degrees of freedom in plane and n degrees of freedom out of plane, so the total degrees of freedom is only 2(3+n), which is at least 6n for FEM. So the super-element method will reduce the amount of data and computing time dramatically.…”

Section: Introductionmentioning

confidence: 99%

Variable Cross-Section Thin-Walled Composite Structure Modeling Based on the Super-Element Method

Xia

Wang

Kretov

2016

AMM

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For slender structures (for example larger aspect ratio wing or fuselage), when they are under loads, the in-plane cross-section shape of these structures remains unchanged. Using this feature, in this paper, a new method called super-element method (SEM) is proposed with the hypothesis of in-plane rigidity. The stiffness matrix of one super-element which has reduced degrees of freedom compared with FEM is derived and they are assembled together to get the stiffness matrix of whole structure. Then through the boundary conditions, the stress and displacement distribution can be calculated out. Calculation analysis of three examples reveals the validity and feasibility of super-element method.

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Section: Introductionmentioning

confidence: 99%