Abstract
Ultrasonic vibrothermography is an effective and non-destructive method, which can be used for a quick detection of coating defects on large surfaces. Mechanical excitation of a layered structure induces inelastic deformation and, as a consequence, energy dissipation in the defective area and local heating. In this work, a three-dimensional numerical simulation of this process is applied to the bi-metallic layered structure with an edge crack. Two models of energy dissipation are considered (hysteretic damping model and visco-elastic Maxwell’s model) for simulation of energy dissipation in a crack tip area under ultrasonic loading. The models allow us to study the effects of the loading frequency, loading direction and location of the coating defects on the heat dissipation and propose optimal regimes for the ultrasonic vibrothermography of bi-metallic layered structures.
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Article history
- ReceivedUntil the next stage: 27 days
- Revision requestedUntil the next stage: 8 days
- RevisedUntil the next stage: 1 day
- AcceptedUntil the next stage: 14 days
- Published
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Copyright © 2018 Anastasiia Kostina, Oleg Plekhov, Sergey Aizikovich.
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