Stability analysis of linear thin shells

Hu, Bin (2014) Stability analysis of linear thin shells. [Laurea magistrale], Università di Bologna, Corso di Studio in Civil engineering [LM-DM270], Documento ad accesso riservato.
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Shell structure is widely used in engineering area. The purpose of this dissertation is to show the behavior of a thin shell under external load, especially for long cylindrical shell under compressive load, I analyzed not only for linear elastic problem and also for buckling problem, and by using finite element analysis it shows that the imperfection of a cylinder could affect the critical load which means the buckling capability of this cylinder. For linear elastic problem, I compared the theoretical results with the results got from Straus7 and Abaqus, and the results are really close. For the buckling problem I did the same: compared the theoretical and Abaqus results, the error is less than 1%, but in reality, it’s not possible to reach the theoretical buckling capability due to the imperfection of the cylinder, so I put different imperfection for the cylinder in Abaqus, and found out that with the increasing of the percentage of imperfection, the buckling capability decreases, for example 10% imperfection could decrease 40% of the buckling capability, and the outcome meet the buckling behavior in reality.

Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Hu, Bin
Relatore della tesi
Corso di studio
Ordinamento Cds
Parole chiave
shell structure, buckling behavior of shell structure
Data di discussione della Tesi
17 Luglio 2014

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