On the Use of Acoustic Emission and Digital Image Correlation for Welded Joints Damage Characterization

Journal of Applied and Computational Mechanics

Safaa Al-Jumaili¹  Kadhum Shrama²  Alastair Clarke³  Sam Evans³  Rhys Pullin³ 

[1] Department of Materials Engineering, University of Basrah, Basrah, Iraq;Iraqi Ministry of Electricity, General Directorate of Electrical Energy production, Basrah, Basrah, Iraq;School of Engineering, Cardiff University, The Parade, CF24 3AA, Cardiff, UK;

关键词: Fatigue;    Welded steel;    Damage characterization;    Acoustic Emission;    Digital Image Correlation;   

DOI  :  10.22055/jacm.2018.25941.1301

来源: DOAJ

【 摘 要 】

A series of tests have been conducted to investigate fatigue damage characterization in corroded welded steel plates using structural health monitoring (SHM) techniques. Acoustic Emission (AE) is a non-destructive testing (NDT) technique with potential applications for locating and monitoring fatigue cracks in service. In the present work, AE is implemented to characterize damage during crack evolution. It is considered to be based on the relationship between RA value (the rise time divided by the amplitude) and the average frequency of the recorded data. Results are confirmed by visual observation of the crack geometry at the end of the test and by Digital image correlation (DIC) measurements. It is seen that the obtained results allow a better understanding of such damage mechanisms, and enabling an early warning against final failure. Thus, ensuring the safety and integrity of the structures is feasible.

【 授权许可】

Unknown