Berggreen, Christian

Branner, Kim

Høgh, Jacob Herold

Schmidt, Jacob Wittrup

Stang, Henrik

Waldbjørn, Jacob Paamand

Hybrid testing is a substructuring technique where a structure is emulated by modelling a part of it in a numerical model while testing the remainder experimentally. Previous research in hybrid testing has been performed on multi-component structures e.g. damping fixtures, however in this paper a hybrid testing platform is introduced for single-component hybrid testing. In this case, the boundary between the numerical model and experimental setup is defined by multiple Degrees-Of-Freedoms (DOFs) which highly complicate the transferring of response between the two substructures. Digital Image Correlation (DIC) is therefore implemented for displacement control of the experimental setup. The hybrid testing setup was verified on a multicomponent structure consisting of a beam loaded in three point bending and a numerical structure of a frame. Furthermore, the stability of the hybrid testing loop was investigated for different ratios of stiffness between the numerical model and test specimen. It was found that when deformations were transferred from the numerical model to the experimental setup, the hybrid test was only stable when the stiffness of the numerical model was higher than the test specimen. The hybrid test gave similar results as a numerical simulation of the full structure. The deviation between the two was primarily due to the response of the specimen in the hybrid test being one load step behind the numerical model.<br/

Online Research Database In Technology

Hybrid Testing of Composite Structures with Single-Axis Control - DTU Orbit (09/11/2017) Hybrid Testing of Composite Structures with Single-Axis ControlHybrid testing is a substructuring technique where a structure is emulated by modelling a part of it in a numerical modelwhile testing the remainder experimentally. Previous research in hybrid testing has been performed on multi-componentstructures e.g. damping fixtures, however in this paper a hybrid testing platform is introduced for single-component hybridtesting. In this case, the boundary between the numerical model and experimental setup is defined by multiple Degrees-Of-Freedoms (DOFs) which highly complicate the transferring of response between the two substructures. Digital ImageCorrelation (DIC) is therefore implemented for displacement control of the experimental setup. The hybrid testing setupwas verified on a multicomponent structure consisting of a beam loaded in three point bending and a numerical structureof a frame. Furthermore, the stability of the hybrid testing loop was investigated for different ratios of stiffness between thenumerical model and test specimen. It was found that when deformations were transferred from the numerical model tothe experimental setup, the hybrid test was only stable when the stiffness of the numerical model was higher than the testspecimen. The hybrid test gave similar results as a numerical simulation of the full structure. The deviation between thetwo was primarily due to the response of the specimen in the hybrid test being one load step behind the numerical model.     General informationState: PublishedOrganisations: Department of Civil Engineering, Section for Structural Engineering, Department of MechanicalEngineering, Solid Mechanics, Section for Building Design, Department of Wind Energy, Wind TurbinesAuthors: Waldbjørn, J. P. (Intern), Høgh, J. H. (Intern), Stang, H. (Intern), Berggreen, C. (Intern), Schmidt, J. W. (Intern),Branner, K. (Intern)Number of pages: 11Publication date: 2013 Host publication informationTitle of host publication: Proceedings of the 19th International Conference on Composite MaterialsMain Research Area: Technical/natural sciencesConference: 19th International Conference on Composite Materials, Montréal, Canada, 28/07/2013 - 28/07/2013Hybrid testing, Hardware-in-the-loop, Substructural testing, Composites, Three point bending, Finite element modelling,high-precision controlSource: dtuSource-ID: u::8626Publication: Research - peer-review › Article in proceedings – Annual report year: 2013 

Hybrid Testing of Composite Structures with Single-Axis Control

https://orbit.dtu.dk/en/publications/eddbb760-c2e6-4e15-8eac-6b8493c8c70e

Hybrid Testing of Composite Structures with Single-Axis Control

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology