The Effect of Non-Flat Interfaces On System Dynamics

Lawal, Iyabo; Shah, Shrinil; Gonzalez-Madrid, M.; Hu, Tianchen; Schwingshackl, Christoph W.; Brake, Matthew Robert

doi:10.1007/978-3-319-74280-9_21

Cited by 2 publications

(1 citation statement)

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“…The BRB has been used in the past to observe nonlinear mechanisms at the contact interface. In [26,28,29], different shapes and geometry of the beam have been used to analyze the effect of interface geometry on natural frequencies and damping, and in [30] electronic pressure films and sensors have been used to locate the high-and low-pressure regions at the interface to monitor the dynamic pressure levels during a vibration cycle. Electronic pressure film sensors give great insights into joint behavior, but are an intrusive technique and may change the behavior of the joint.…”

Section: Bronsmentioning

confidence: 99%

Experimental Investigation of Local Dynamics in a Bolted Lap Joint Using Digital Image Correlation

Brøns

Kasper

Chauda

et al. 2020

Journal of Vibration and Acoustics

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Abstract The dynamics of structures with joints commonly show nonlinearity in their responses. This nonlinear behaviour can arise from the local dynamics of the contact interfaces. The nonlinear mechanisms at an interface are complicated to study due to the lack of observability within the contact interface itself. In this work, Digital Image Correlation (DIC) is used in combination with a high-speed camera to observe the local motion at the edge of the interface of a bolted lap joint. Results demonstrate that it is possible to use this technique to monitor the localised motion of an interface successfully. It is observed that the two beam parts of the studied lap joint separate when undergoing bending vibrations, and that there is a clear asymmetry in the response of the left and the right end of the interface. Profilometry indicates that the asymmetry in the response is due to the mesoscale topography of the contact interface, highlighting the importance of accounting for surface features in order to model the nonlinearities of a contact interface accurately.

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Section: Bronsmentioning

confidence: 99%