Simonelli, Maria Grazia (2017) Plastic buckling of thin and moderately thin plates and shells: classic problems and new perspectives. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Plastic buckling of thin and moderately thin plates and shells: classic problems and new perspectives |
| Autori: | Autore Email Simonelli, Maria Grazia mariagrazia.simonelli@unina.it |
| Data: | 10 Aprile 2017 |
| Numero di pagine: | 172 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Strutture per l'Ingegneria e l'Architettura |
| Dottorato: | Ingegneria strutturale, geotecnica e sismica |
| Ciclo di dottorato: | 29 |
| Coordinatore del Corso di dottorato: | nome email Rosati, Luciano rosati@unina.it |
| Tutor: | nome email Guarracino, Federico [non definito] |
| Data: | 10 Aprile 2017 |
| Numero di pagine: | 172 |
| Parole chiave: | plasticity; flow theory; deformation theory; stability; plastic buckling paradox; plates; shells; non-linear FEA |
| Settori scientifico-disciplinari del MIUR: | Area 08 - Ingegneria civile e Architettura > ICAR/08 - Scienza delle costruzioni |
| Depositato il: | 25 Apr 2017 22:06 |
| Ultima modifica: | 13 Mar 2018 08:07 |
| URI: | http://www.fedoa.unina.it/id/eprint/11745 |
| DOI: | 10.6093/UNINA/FEDOA/11745 |
Abstract
Elastic-plastic instability of structures is an extensive field which encompasses a broad category of civil and mechanical engineering problems and involves several topics such as the physical and mechanical characterization of materials, yield criteria, different theories of plasticity and phenomena related to geometric nonlinearities, especially for thin and moderately thin plates and shells. The aim of this work is to investigate the plastic buckling of plates and shells subjected to different loading conditions with respect to the phenomenon of the plastic buckling paradox. Following the proposal of a new analytical approach to the problem, which throws light on the fundamental differences in the use of the flow theory and of the deformation theory of plasticity, by means of an extensive numerical investigation on cylindrical shells with different geometrical and material properties, some fundamental limitations of the modern numerical nonlinear analyses conducted by the use of the Finite Elements are highlighted and discussed in detail.
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