Nonlinear Guided-Wave Mixing for Condition Monitoring of Bolted Joints

Bolted joints are fundamental to numerous structural components in engineering practice. Nevertheless, their failure or even their loosening can lead to insufficient performance and reduced structural safety. This study presents a theoretical development and experimental investigation into nonlinear guided-wave mixing for integrity monitoring of bolted joints in plates. Combinational harmonics generated due to nonlinear Lamb wave mixing and contact acoustic nonlinearity at the bolted joints were used to evaluate the applied torque level in the joint. The area of the power spectral density in the region of the sum combinational harmonic bandwidth is found to be highly correlated to the applied torque level at the joint. Moreover, the effect of the number of cycles and thus the time duration of the excitation is investigated. The results show that the combinational harmonics remain robust for different numbers of cycles in detecting bolt loosening. The findings presented in this study also provide physical insight into the phenomena of nonlinear Lamb wave mixing for evaluating applied torque in bolted joints, and the results help further advance the use of nonlinear guided waves for damage detection.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:21

Enthalten in:

Sensors (Basel, Switzerland) - 21(2021), 15 vom: 27. Juli

Sprache:

Englisch

Beteiligte Personen:

Pineda Allen, Juan Carlos [VerfasserIn]
Ng, Ching Tai [VerfasserIn]

Links:

Volltext

Themen:

Bolt loosening
Bolted joint
Combination harmonic
Guided wave
Journal Article
Lamb wave
Nonlinear
Wave mixing

Anmerkungen:

Date Revised 13.08.2021

published: Electronic

Citation Status PubMed-not-MEDLINE

doi:

10.3390/s21155093

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM329164368