Effects of fastener load on wave propagation through lap joint | Zendy

Jingjing Bao | Zendy; Victor Giurgiutiu | Zendy

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Effects of fastener load on wave propagation through lap joint

Author(s) -

Jingjing Bao,

Victor Giurgiutiu

Publication year - 2013

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.2012185

Subject(s) - fastener , lap joint , joint (building) , bolted joint , transducer , acoustics , materials science , structural engineering , engineering , finite element method , physics

Experimental results on the propagation of guided waves through a bolted joint under various bolt load values are presented. Piezoelectric wafer active sensor (PWAS) transducers are used for the generation and reception of the guided waves. Two specimen types are used, a strip lap joint and a plate lap joint. The signals measured under various bolt load values and frequency values are studied in order to identify relevant features that change drastically with bolt load. We found that some of the signals, especially those at S0 tuning frequency of 320 kHz, were very much simplified by the change from strip to plate conditions. The main contribution of this paper to the advancement of the state of the art consists in highlighting the need for removing the confounding effects of the strip side reflections on the correct interpretation of guided wave changes as they travel through a lap joint with various fastener loads.

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