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ROBUST KNOCKDOWN FACTORS FOR THE DESIGN OF CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION: POTENTIALS, PRACTICAL APPLICATION AND RELIABILITY ANALYSIS

Wagner, Ronald and Hühne, Christian (2018) ROBUST KNOCKDOWN FACTORS FOR THE DESIGN OF CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION: POTENTIALS, PRACTICAL APPLICATION AND RELIABILITY ANALYSIS. Thin-Walled Structures (135), pp. 410-430. Elsevier. DOI: 10.1016/j.ijmecsci.2017.11.020 ISSN 0263-8231

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Abstract

This paper overviews the efforts that led to new improved knockdown factors for the design of cylindrical metal shells under axial compression. The corresponding design methods were derived by means of three step procedure involving deterministic methods for the buckling load prediction, high-fidelity experimental results and an extensive probabilistic analysis. The new design procedure is demonstrated by means of a full-scale primary launch-vehicle shell and the results show an estimated weight reduction of about 20 %. The potentials of the new design guidelines are shown and open questions regarding the influence of manufacturing specific imperfection signatures on the buckling load are addressed and design implications are derived and discussed. Dynamic load-controlled simulations with imperfection signatures for different manufacturing qualities and processes are performed and the influence of load introduction and mechanical boundary conditions on the buckling loadise studied. From the results it is concluded that the commonly used practice of displacement-controlled shell buckling experiments and numerical simulations is sufficient for conservative design of real shell applications.

Item URL in elib:https://elib.dlr.de/118231/
Document Type:Article
Title:ROBUST KNOCKDOWN FACTORS FOR THE DESIGN OF CYLINDRICAL SHELLS UNDER AXIAL COMPRESSION: POTENTIALS, PRACTICAL APPLICATION AND RELIABILITY ANALYSIS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wagner, Ronaldronald.wagner (at) dlr.deUNSPECIFIED
Hühne, Christianchristian.huehne (at) dlr.deUNSPECIFIED
Date:2018
Journal or Publication Title:Thin-Walled Structures
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.ijmecsci.2017.11.020
Page Range:pp. 410-430
Editors:
EditorsEmail
Wiercigroch, M.UNSPECIFIED
Davey, K.UNSPECIFIED
Publisher:Elsevier
Series Name:Elsevier
ISSN:0263-8231
Status:Published
Keywords:Shell buckling, robust design, knockdown factor, imperfection sensitivity, perturbation approach, probabilistic approach, Monte-Carlo-Method, load controlled
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Raumfahrzeugsysteme - Numerische Verfahren und Simulation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Deposited By: Wagner, Ronald
Deposited On:15 Jan 2018 12:27
Last Modified:06 Sep 2019 15:20

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