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Erschienen in:
2020 | OriginalPaper | Buchkapitel
Bolted Joint Monitoring Using the Elastic Wave Propagation
verfasst von : Rafał Kędra, Magdalena Rucka
Erschienen in: Proceedings of the 13th International Conference on Damage Assessment of Structures
Verlag: Springer Singapore
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Abstract
The paper presents an analysis of wave propagation through the contact zone in pretensioned bolted lap joints. A mathematical Schoenberg’s model of wave propagation through the interface between two elastic media was discussed. The experiment was carried out using piezoelectric transducers. A single lap joint with different preload levels was examined. The value of the bolt load was measured by a force washer transducer. In the first step, an indicator based on the signal energy was tested. It has been shown that the visible trend is observable only for selected frequency and small range of bolt load. For this reason, advanced signal processing techniques were used for quantitative comparing the recorded signals. The presented experimental results are consistent with the theoretical prediction and they can be used to monitor the bolted joint state in a wide range of the pretension force.