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Determination of the material/geometry of the section most adequate for a static loaded beam subjected to a combination of bending and torsion

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Resumo:The Finite Element Method (FEM) is widely used to solve structural analysis problems. In this work, a novel Finite Element Model Updating methodology for static analysis is presented. The aim of the work is to improve the quality of the results using the Finite Element Updating techniques, by optimizing geometric parameters of the models and material properties in order to minimize deflection. Deflection can be minimized by increasing the Inertia moment of the section and/or Young modulus of the material. The Young modulus can be optimized by selecting an adequate material. In this work, material selection charts were used to determine the most reliable material. The selected material was then tested by tensile and extensometry tests to obtain Young modulus, Yield stress, and Poisson coefficient. The Inertia moment can be maximized by improving the geometry of the section, such as adding ribs or webs. A substantial improvement of the deflection can be achieved, but, in order to obtain the best results, optimization must be used. A MATLAB program was used to optimize the ANSYS models using a programming code. In order to know if the results are getting worse or better in relation to the previous iterations, an objective function was defined. The model is optimized when is not possible to further optimize the objective function.
Autores principais:Silva, Hugo Miguel
Assunto:Finite element method Finite element model updating Optimization Structural static analysis Materials selection Mechanical tests
Ano:2011
País:Portugal
Tipo de documento:dissertação de mestrado
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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