Fatigue damage detection and risk assessment via neural network modeling of ultrasonic signals

Hassan Alqahtani, Asok Ray

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This paper develops a data-driven autonomous method for detection of fatigue damage and classification of the associated damage risk in mechanical structures, based on ultrasonic signal energy. The underlying concept is built upon attenuation of the signal and stability of the attenuation process. The attenuation provides pertinent information for damage quantification, whereas the stability represents resistance toward the fatigue damage growth. The proposed neural network (NN) model has been trained using the scaled conjugate-gradient back-propagation method. The NN model is capable of damage detection and damage classification into five classes of increasing risk. The wavelet transform tool has been used to reduce the noisy pattern of the ultrasonic signal energy by using the associated approximation coefficients. The results show that the proposed method of approximation signal energy can detect and classify the damage with an accuracy of up to ∼98.5%.

Original languageEnglish (US)
Pages (from-to)1587-1604
Number of pages18
JournalFatigue and Fracture of Engineering Materials and Structures
Issue number6
StatePublished - Jun 2022

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering


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