Analytical model for the prediction of wrinkling of rear pressure bulkheads

Ferrari, Alberto (2015) Analytical model for the prediction of wrinkling of rear pressure bulkheads. [Laurea magistrale], Università di Bologna, Corso di Studio in Ingegneria aerospaziale [LM-DM270] - Forli', Documento ad accesso riservato.
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Abstract

In Airbus GmbH (Hamburg) has been developed a new design of Rear Pressure Bulkhead (RPB) for the A320-family. The new model has been formed with vacuum forming technology. During this process the wrinkling phenomenon occurs. In this thesis is described an analytical model for prediction of wrinkling based on the energetic method of Timoshenko. Large deflection theory has been used for analyze two cases of study: a simply supported circular thin plate stamped by a spherical punch and a simply supported circular thin plate formed with vacuum forming technique. If the edges are free to displace radially, thin plates will develop radial wrinkles near the edge at a central deflection approximately equal to four plate thicknesses w0/ℎ≈4 if they’re stamped by a spherical punch and w0/ℎ≈3 if they’re formed with vacuum forming technique. Initially, there are four symmetrical wrinkles, but the number increases if the central deflection is increased. By using experimental results, the “Snaptrhough” phenomenon is described.

Abstract
Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Ferrari, Alberto
Relatore della tesi
Scuola
Corso di studio
Ordinamento Cds
DM270
Parole chiave
Wrinkling, RPB, bulkhead, wrinkles, plate
Data di discussione della Tesi
19 Marzo 2015
URI

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