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Semi-analytical tools for the Single Perturbation Load Approach using the Ritz Method

Castro, Saullo and Mittelstedt, Christian and Arbelo, Mariano and Khakimova, Regina and Degenhardt, Richard (2014) Semi-analytical tools for the Single Perturbation Load Approach using the Ritz Method. 1st International Conference on Mechanics of Composites, 8.-12.Juni 2014, Long Island, USA.

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Many structural components or launcher structures can be modelled using a conical or cylindrical-like set of shell equations. The current guidelines used at the preliminary design phase are perceived as conservative and do not take into account properly the stacking sequence of laminated shells. New guidelines has been developed for example by the NASA project Shell Buckling Knock-Down Factor (SBKDF) and by the European consortium DESICOS. One of the approaches currently investigated is the Single Perturbation Load Approach (SPLA), originally proposed by Christian Hühne (2008) which is based on the phenomena that the axially compressed shell buckling load gets nearly constant after a threshold of geometric imperfection caused by a lateral load, obtaining a convenient design load. A disadvantage of this method is that it requires many non-linear computations in order to find this load threshold. This study presents the development of semi-analytical tools that allow a fast prediction of the design load using the SPLA, with the aim to overcome the computational disadvantage of this method.

Item URL in elib:https://elib.dlr.de/90375/
Document Type:Conference or Workshop Item (Speech)
Title:Semi-analytical tools for the Single Perturbation Load Approach using the Ritz Method
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Castro, SaulloPFH GöttingenUNSPECIFIED
Mittelstedt, ChristianSogettiUNSPECIFIED
Arbelo, MarianoPFH GöttingenUNSPECIFIED
Degenhardt, RichardDLRUNSPECIFIED
Date:8 June 2014
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Buckling, Ritz-method, composites
Event Title:1st International Conference on Mechanics of Composites
Event Location:Long Island, USA
Event Type:international Conference
Event Dates:8.-12.Juni 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Raumfahrzeugsysteme - HL-Primärstrukturen für Orbitale Systeme (old)
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:01 Sep 2014 08:14
Last Modified:20 Jun 2021 15:45

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