Affiliations: [a] Electrical and Computer Engineering Department,
Michigan State University, MI, USA | [b] Composite Vehicle Research Center, MI, USA | Université Laval, Canada | Tohoku University, Japan
Correspondence:
[*]
Corresponding author: Oleksii Karpenko, Electrical and Computer
Engineering Department, Michigan State University, MI 48824, USA. E-mail:
karpenko@msu.edu
Abstract: Dissimilar material bonding has recently gained a lot of attention
in automotive, marine and defense applications. Nevertheless, a major hurdle
limiting the full acceptance of such structural components is the lack of
non-destructive evaluation (NDE) technique to evaluate their strength, which
depends on the integrity of the bonding layer. In this work, guided wave (GW)
inspection with surface-mounted piezoelectric sensors (PZT) was employed along
with time reversal for Structural Health Monitoring (SHM) of dissimilar
material lap-joints. Baseline-free probability imaging was used to identify the
location of artificial disbond. The results of GW inspection were further
validated with ultrasonic C-scan. Overall, the technique shows great potential
in detection of defects in bonded joints.
Keywords: Dissimilar material joints, SHM, guided waves, time reversal, diagnostic imaging
