Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 51 5 2019 12 22 Determination of Crack Growth in St52 Structural Steel via Acoustic Emission Technique and Its Application in Steel Structures Determination of Crack Growth in St52 Structural Steel via Acoustic Emission Technique and Its Application in Steel Structures 993 1004 2935 10.22060/mej.2018.13041.5512 FA Mohammad Riahi Seyed Mostafa Matloobi PhD student/IUST Seyed Milad Hoseinnejad mechanical engineering of master of science student, iran university of science and technology Journal Article 2017 06 19 Acoustic emission is one of the most important techniques in none-destructive test, that is able to evaluate crack growth in steel element of structure and is efficient in order to condition monitoring for deployment on in-service bridge component and these data can be used for schedule planning for maintenance of bridge structure. In the line of experiments and empirical research, samples of structural steel (St52) were used as a compact tension specimen in axial tensile fatigue test in order to study the crack growth. In this study, application of acoustic emission technique for health monitoring and determination of crack length in components of steel structure which are under axial fatigue load are investigated by using experimental test result, for this purpose correlation between acoustic emission parameters such an energy rate, count rate, and crack length and fatigue life has been studied. Finally, by using the extracted data from acoustic emission and fatigue test result, and least mean square regression analysis, the value of the constant for the relation between crack length and acoustic emission parameters have been determined. Acoustic emission is one of the most important techniques in none-destructive test, that is able to evaluate crack growth in steel element of structure and is efficient in order to condition monitoring for deployment on in-service bridge component and these data can be used for schedule planning for maintenance of bridge structure. In the line of experiments and empirical research, samples of structural steel (St52) were used as a compact tension specimen in axial tensile fatigue test in order to study the crack growth. In this study, application of acoustic emission technique for health monitoring and determination of crack length in components of steel structure which are under axial fatigue load are investigated by using experimental test result, for this purpose correlation between acoustic emission parameters such an energy rate, count rate, and crack length and fatigue life has been studied. Finally, by using the extracted data from acoustic emission and fatigue test result, and least mean square regression analysis, the value of the constant for the relation between crack length and acoustic emission parameters have been determined. https://mej.aut.ac.ir/article_2935_b6617980ce90f637e68c3ebe8b9be745.pdf