Thin wallled cylinders under external pressure may be affected by instability phenomena particularly dangerous when taking place in the elastic domain. Geometric imperfections caused by fabrication processes heavily influence the critical pressure. In order to investigate the relationship between the collapse mechanism and the various types of imperfections affecting this kind of structures a series of experimental tests on scale models has been carried out. The dimensional parameters of the specimens have been selected in order to keep the instabiliy phenomenon in the elastic range. At the same time numerical calculations simulating the experimental tests have been performed by finite element method. The geometrical defects measured on the specimens were introduced in the correspondent numerical models. A good agreement was found in the comparison between experimental and numerical results.
Elastic instability of thin cylindrical shells: Numerical and experimental investigation
Die elastische Instabilität von dünnen Zylinderschalen: numerische und experimentelle Untersuchungen
Ocean Engineering ; 24 , 2 ; 133-160
1997
28 Seiten, 22 Bilder, 3 Tabellen, 16 Quellen
Aufsatz (Zeitschrift)
Englisch
Meerestechnik , Zylinderschale , dynamisches Verhalten , Wanddicke , Außendruck , Instabilität , elastische Verformung , kritischer Druck , Fertigungsfehler , experimentelle Untersuchung , numerisches Verfahren , Modellsimulation , Finite-Elemente-Methode , Dehnungsmessung , Eigenwert , Systemanalyse
DYNAMIC INSTABILITY I N CYLINDRICAL SHELLS
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