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SENSITIVITY ANALYSIS OF AXIALLY COMPRESSED CYLINDRICAL SHELLS WITH PROBABILISTIC AND DETERMINISTIC METHODS

Wagner, Ronald and Hühne, Christian (2015) SENSITIVITY ANALYSIS OF AXIALLY COMPRESSED CYLINDRICAL SHELLS WITH PROBABILISTIC AND DETERMINISTIC METHODS. 3rd Int. Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Struc-tures., 25.-27. März 2015, Braunschweig, Deutschland. (Unpublished)

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Abstract

Thin-walled unstiffened cylindrical composite shells are prone to buckling. The structural behavior of these shells responds really sensitive to initial geometric imperfections, which occur during the manufacturing process of an unstiffened composite cylinder. Geometric imperfections like small dimples cause a deviation from the perfect geometrical shape of a cylinder and can reduce the buckling load significantly. Scattering of material and geometric parameters as well as an inhomo-geneous loading causes also a reduction of the load carrying capability of these cylinders. Re-search’s mainly investigated the influence of geometric imperfections on the buckling load and ignored the other sources of imperfections. In this paper the before mentioned imperfections and their effects on the buckling load of cylindrical shells are investigated using a semi-analytical prob-abilistic sensitivity analysis. With this method the structural response behavior of the cylindrical shells is evaluated in order to identify imperfections which are most critical in terms of stability behavior. The study is performed for shells with equal material und geometric parameters but different laminate stacking and the imperfections are classified into different degrees of priority using indices. The purpose of this paper is to identify imperfections which are most critical on the stability behavior of unstiffened cylindrical composite shells to show where to spend resources for the largest improvement of future guidelines for imperfection sensitive composite launcher structures.

Item URL in elib:https://elib.dlr.de/102161/
Document Type:Conference or Workshop Item (Speech)
Title:SENSITIVITY ANALYSIS OF AXIALLY COMPRESSED CYLINDRICAL SHELLS WITH PROBABILISTIC AND DETERMINISTIC METHODS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, Ronaldronald.wagner (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:2015
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Unpublished
Keywords:Buckling, cylindrical composite shells, imperfection, probabilistic sensitivity analysis
Event Title:3rd Int. Conference on Buckling and Postbuckling Behaviour of Composite Laminated Shell Struc-tures.
Event Location:Braunschweig, Deutschland
Event Type:international Conference
Event Dates:25.-27. März 2015
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Wagner, Ronald
Deposited On:14 Jan 2016 12:21
Last Modified:10 May 2016 23:42

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