Title: Experimental results from multiaxial buckling tests on cylindrical CFRP shells with R/t-ratio of 147

DOI: 10.15480/882.15211


Authors: Stefan Panek [0000-0001-7498-2949], Tobias S. Hartwich [0000-0001-6360-5240], Dieter Krause [0000-0002-1253-1699]


Affiliation: Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, Hamburg, Germany

Contact: stefan.panek@tuhh.de


Keywords: Thin-walled Shell, Composite Shell, Buckling, Experiment, Combined Loading

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Abstract 

Buckling failure of cylindrical CFRP shells in combined load cases is only considered in few experimental studies, despite occurring frequently in both aerospace and civil applications. Hence, validation and verification of numerical models for these scenarios can be challenging.
In this publication the thoroughly documented results of a large number of buckling tests with CFRP shells in multiaxial loading are provided, to support the validation of FE models and possibly enable the development of new design approaches.
Extensive experimental campaigns on the buckling of small-scale cylindrical CFRP shells in multiaxial load cases were carried out on a set of nominally identical cylindrical CFRP shells. These shells were manufactured at the Institute of Composite Structures and Adaptive Systems of DLR in Braunschweig and have been tested in a previous campaign in pure axial compression. In this study, various combined load cases comprised of axial compression and bending, axial compression and torsion, as well as combinations of all three buckling inducing load types were investigated. This publication contains a separate sheet for each considered shell, listing for all individual tests the achieved buckling loads and the loading imperfections determined from measurement data as well as the mean values and standard deviation calculated per test point.


Purpose und Method

The buckling failure of cylindrical CFRP shells in combind load cases is only considered in very few experimental studies, despite combined loading occurring frequently in both aerospace and civil applications. Hence, validation and verification of numerical models for these scenarios is challenging.
In order to support the validation of FE models and possibly enable the development of new design approaches, the thoroughly documented results of a large number of buckling tests with CFRP shells in multiaxial loading are provided here. 
The shells were manufactured at DLR in Braunschweig and extensively tested on the Hexapod test rig at TUHH.



Access and terms of use 

The results of the test campaigns as presented in this publication are free to use under CC BY 4.0. Please cite this data set accordingly.