Hybrid optimization of hierarchical stiffened shells based on smeared stiffener method and finite element method

Stiffened plates and shells often find wide application in bridge engineering, aircraft, ship and allied industries owing to its high strength to weight ratios. They are often subjected to dynamic loading such as air blast loading, for which detailed dynamic analysis is required to study the structure under these conditions. In the present approach, the dynamic response of stiffened plates and shells has been investigated by the finite element method employing a high precision arbitrary-shaped triangular shell element in which stiffeners may lie in any arbitrary direction within the element. This provides greater flexibility in the mesh generation. The governing undamped equations of motion have been solved by Newmark’s method for direct time integration. The dynamic response of plates and shells with or without stiffeners, subjected to different kinds of load-history have been studied and results are compared with the published analytical results.

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Vibration isolation design for periodically stiffened shells by the wave finite element method

Journal of Sound and Vibration ◽

10.1016/j.jsv.2017.12.035 ◽

2018 ◽

Vol 419 ◽

pp. 90-102 ◽

Cited By ~ 9

Author(s):

Jie Hong ◽

Xueqing He ◽

Dayi Zhang ◽

Bing Zhang ◽

Yanhong Ma

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Vibration Isolation ◽

Stiffened Shells ◽

Element Method

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Static Analysis of Stiffened Shells Using an Edge-Based Smoothed MITC3 (ES-MITC3) Method

Mathematical Problems in Engineering ◽

10.1155/2021/3996485 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Quoc Hoa Pham ◽

Phu-Cuong Nguyen

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Beam Theory ◽

Numerical Results ◽

Shell Structures ◽

Triangular Element ◽

Good Convergence ◽

Stiffened Shells ◽

Edge Based ◽

Element Method

A novel approach for solving the stiffened shell structures by using an edge-based smoothed MITC3 finite element method (ES-MITC3) is presented in this paper. The ES-MITC3 method is an efficient finite element method by combining the edge-based smoothed finite element method (ES-FEM) with the original MITC3 triangular element to not only significantly improve the accuracy but also overcome the shear-locking phenomenon in the Reissner–Mindlin shell analysis. In this study, the ES-MITC3 method is applied for shell structures and then reinforced by stiffeners based on the Timoshenko beam theory to achieve more durability and strength structures. The transverse displacements of the shell structures and stiffeners at the contact positions are assumed compatible. Numerical results of the ES-MITC3 element are compared with those of available other numerical results to demonstrate a good convergence and accuracy of the present method.

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Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽

10.1039/c9nr06508c ◽

2019 ◽

Vol 11 (43) ◽

pp. 20868-20875 ◽

Cited By ~ 1

Author(s):

Junxiong Guo ◽

Yu Liu ◽

Yuan Lin ◽

Yu Tian ◽

Jinxing Zhang ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Interfacial Effect ◽

Infrared Photodetector ◽

The Finite Element Method ◽

Ferroelectric Domains ◽

Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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