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Experimental Nondestructive Test for Estimation of Buckling Load on Unstiffened Cylindrical Shells Using Vibration Correlation Technique

Kalnins, K. and Arbelo, Mariano and Ozolins, Olgerts and Skukis, Eduards and Castro, Saullo and Degenhardt, Richard (2015) Experimental Nondestructive Test for Estimation of Buckling Load on Unstiffened Cylindrical Shells Using Vibration Correlation Technique. Shock and Vibration, 729. Hindawi Publishing Corporation. DOI: 10.1155/2015/729684 ISSN 1070-9622

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Abstract

Nondestructive methods, to calculate the buckling load of imperfection sensitive thin-walled structures, such as large-scale aerospace structures, are one of the most important techniques for the evaluation of new structures and validation of numerical models. The vibration correlation technique (VCT) allows determining the buckling load for several types of structures without reaching the instability point, but this technique is still under development for thin-walled plates and shells. This paper presents and discusses an experimental verification of a novel approach using vibration correlation technique for the prediction of realistic buckling loads of unstiffened cylindrical shells loaded under axial compression. Four different test structures were manufactured and loaded up to buckling: two composite laminated cylindrical shells and two stainless steel cylinders. In order to characterize a relationship with the applied load, the first natural frequency of vibration and mode shape is measured during testing using a 3D laser scanner.The proposed vibration correlation technique allows one to predict the experimental buckling load with a very good approximation without actually reaching the instability point. Additional experimental tests and numerical models are currently under development to further validate the proposed approach for composite and metallic conical structures.

Item URL in elib:https://elib.dlr.de/114119/
Document Type:Article
Title:Experimental Nondestructive Test for Estimation of Buckling Load on Unstiffened Cylindrical Shells Using Vibration Correlation Technique
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Kalnins, K.RTUUNSPECIFIED
Arbelo, Marianopfh göttingenUNSPECIFIED
Ozolins, OlgertsrtuUNSPECIFIED
Skukis, EduardsrtuUNSPECIFIED
Castro, Saullopfh göttingenUNSPECIFIED
Degenhardt, RicharddlrUNSPECIFIED
Date:27 July 2015
Journal or Publication Title:Shock and Vibration
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:729
DOI :10.1155/2015/729684
Publisher:Hindawi Publishing Corporation
ISSN:1070-9622
Status:Published
Keywords:VCT, buckling
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 > Structural Mechanics
Deposited By: Degenhardt, Richard
Deposited On:18 Sep 2017 09:35
Last Modified:18 Sep 2017 09:35

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