Abstract
The modelling of the dynamic response of a structure containing joints is gradually reaching a stage where somewhat realistic results can be obtained from the analysis. Regardless of the progress in the analysis, often a validation against experimental data fails due to the poor repeatability of the experimental results. Every reassembly of a joint tends to lead to a slightly different nonlinear response, since the underlying nonlinear mechanisms at the interface, driving the nonlinear response, are very sensitive to the boundary conditions. To understand the reassembly repeatability of a lap joint, a state of the art, high fidelity, modelling approach was used to investigate which parameters lead to the largest uncertainties. Variations in the friction parameters, loss of bolt preload and inaccuracies in the surface geometry were considered. It could be shown that all these effects can influence the nonlinear response of a structure with a lap joint, with the interface geometry having the larges impact.
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Acknowledgement
The author would like to thank the participants of Project 3 of the 2016 NOMAD institute for providing him with an updated FE model as a starting point of this investigation.
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Schwingshackl, C.W. (2017). Identification Reassembly Uncertainties for a Basic Lap Joint. In: Allen, M., Mayes, R., Rixen, D. (eds) Dynamics of Coupled Structures, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-54930-9_6
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DOI: https://doi.org/10.1007/978-3-319-54930-9_6
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