Optimization Design of Patch Shape for Rivet Repair of Aircraft Skin

In order to study the effect of patch shape on the strength of the damaged skin after rivet repair, the paper uses the elastic-plastic finite element method to analyze the rivet repair of the circular hole damage and gives the rivet loads of all the rivets under the three shapes of patches respectively. The results show that the circular patch can observably improve the strength of the aircraft skin after rivet repair, compared with the right-angled rectangle patch and the fillet-rectangle patch, in the same condition of the patch materials and rivet parameters and technology equipments. The design can enhance the security of the repaired aircraft and have some values for the peacetime repair and the emergent repair of aircraft structure.

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Static and Dynamic Characteristic Analysis of the Tower for Vertical Axis Wind Turbine Based on Finite Element Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.613 ◽

2012 ◽

Vol 229-231 ◽

pp. 613-616

Author(s):

Yan Jue Gong ◽

Yuan Yuan Zhang ◽

Fu Zhao ◽

Hui Yu Xiang ◽

Chun Ling Meng ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Wind Turbine ◽

Dynamic Characteristic ◽

Optimization Design ◽

Vertical Axis ◽

Vertical Axis Wind Turbine ◽

Characteristic Analysis ◽

Support Structure ◽

Element Method

As an important part of the vertical axis wind turbine, the support structure should have high strength and stiffness. This article adopts finite element method to model a kind of tower structure of the vertical axis wind turbine and carry out static and modal analysis. The static and dynamic characteristic results of tower in this paper provide reference for optimization design the support structure of wind turbine further.

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Topology Optimization Using Node-Based Smoothed Finite Element Method

International Journal of Applied Mechanics ◽

10.1142/s1758825115500854 ◽

2015 ◽

Vol 07 (06) ◽

pp. 1550085 ◽

Cited By ~ 20

Author(s):

Z. C. He ◽

G. Y. Zhang ◽

L. Deng ◽

Eric Li ◽

G. R. Liu

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Topology Optimization ◽

Optimization Design ◽

Solid Mechanics ◽

Optimality Criteria ◽

Topology Optimization Problem ◽

Design Variables ◽

Smoothed Finite Element Method ◽

Element Method

The node-based smoothed finite element method (NS-FEM) proposed recently has shown very good properties in solid mechanics, such as providing much better gradient solutions. In this paper, the topology optimization design of the continuum structures under static load is formulated on the basis of NS-FEM. As the node-based smoothing domain is the sub-unit of assembling stiffness matrix in the NS-FEM, the relative density of node-based smoothing domains serves as design variables. In this formulation, the compliance minimization is considered as an objective function, and the topology optimization model is developed using the solid isotropic material with penalization (SIMP) interpolation scheme. The topology optimization problem is then solved by the optimality criteria (OC) method. Finally, the feasibility and efficiency of the proposed method are illustrated with both 2D and 3D examples that are widely used in the topology optimization design.

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