acta natura et scientia, vol.3, no.1, pp.59-69, 2022 (Peer-Reviewed Journal)
Predictive maintenance techniques are developed to help determine the
condition of in-service equipment in order to predict when maintenance should be
performed. There is a need for cost-performance effective approaches and methods
for predictive maintenance that can make non-destructive on-site measurements to
predict residual stress-induced critical faults in large metal structures, such as ships.
In this study, an optical method based on the calculation of the non-destructive
surface magnetic permeability coefficient is proposed for monitoring the residual
stress distribution in AISI4040 and DUPLEX materials. In our proposed new method
for determining theoretically the residual stress at the joint site of large plates in
ships, the Lorentz-Drude model and the Fresnel approximation were used. Our
results show that the new optical technique proposed in this study is sufficient and
thriving for the determination of residual stresses in large metal structures.