Vibration Analysis for Damage Detection in Metal-to-Metal Adhesive Joints

Abstract

Vibration based non-destructive evaluation shows promise for damage detection in metal-to-metal adhesive joints. This research investigates an experimental technique to diagnose damage in single-lap adhesive joints subject to cyclical tensile loading. Vibration analysis reveals that damage can be correlated with changes in identified modal damping ratios. Constant amplitude forcing functions are employed to eliminate amplitude-dependent nonlinearities in the dynamic response profiles. Damping estimates obtained from time-domain analyses correlate well with damage magnitudes. Finite element modal analysis of the lap joints supports the experimental results.

Evaluation of Welded Lap Joints Using Ultrasonic Guided Waves

“…These joints play a crucial role in ensuring the optimal performance of the assembled parts. However, the presence of defects within lap joints can significantly compromise their strength and integrity [ 1 , 2 , 3 , 4 , 5 ]. In recent years, ultrasonic guided waves (UGWs) have emerged as a powerful technique for the non-destructive testing and evaluation of lap joints [ 6 , 7 , 8 ].…”

Defect‐Free Sound Insulator Using Single Metal‐Based Friction Stir Process Array

“…However, in many applications, nonuniform vibrational waves or high‐strain‐rate periodic stresses can induce or initiate significant failure on the metallic structures of metals and alloys during long‐term service, for example, fatigue damages, [ 1 ] stress corrosion, [ 2 ] and even strong embrittlement. [ 3 ] Furthermore, in metal‐to‐metal joints [ 4 ] and dissimilar metal welds, [ 5 ] vibrational waves can cause more premature and substantial damage due to impedance mismatch and cavitation or internal reflecting standing waves. [ 4,5 ] Industries have focused on vibrational/sound isolation by damping using rubber mounting ( Figure A), [ 6 ] utilizing the nonlinear effective stiffness of structural materials, [ 7 ] or design optimization using liquid cavities, [ 8 ] to prevent mechanical failure.…”

“…[ 3 ] Furthermore, in metal‐to‐metal joints [ 4 ] and dissimilar metal welds, [ 5 ] vibrational waves can cause more premature and substantial damage due to impedance mismatch and cavitation or internal reflecting standing waves. [ 4,5 ] Industries have focused on vibrational/sound isolation by damping using rubber mounting ( Figure A), [ 6 ] utilizing the nonlinear effective stiffness of structural materials, [ 7 ] or design optimization using liquid cavities, [ 8 ] to prevent mechanical failure. Those designs are practically valuable and commonly used.…”

Study of surface bonding imperfection effects on equivalent identified dynamic Young’s and shear moduli using a modal based joint identification method

“…One of these limitations is the absence of a low-cost and reliable Non-Destructive Evaluation (NDE) method to monitor the adhesive joint's structural health state and remaining service life of it intelligently [4] needs to be further developed. Although, Local Damage Detection (LDD) methods like Acoustic emission [5], X-ray [6], etc.…”