Abstract
In order to achieve rapid detection and localization of defects in a crane box beam, we used acoustic emission technology (AET) and metal magnetic memory technology (MMMT) to obtain the propagating characteristics of artificial defects during destructive testing on the crane box beam. The AE sources of crack growth and plastic deformation could be located accurately on the box beam by using the AE linear location method. We analyzed the AE location event number of the AE sources; the AE location events of the crack growth were produced at a rate exceeding 85 % in the first loading process. We obtained the changing curve of the magnetic field intensity Hp value of the MMMT signals with the load; when the load was increased to 8 t, the Hp had a substantial increase, with a maximum of about 2,000 A/m. The results indicate that both the AET and MMMT could reflect the severity of the defects, but the AE is more sensitive and could provide dynamic monitoring of the structural changes.
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References
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Acknowledgment
This study was financially supported by China’s 12th Five-Year Science and Technology Supporting Project no. 2011BAK06B05.
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Wu, Z., Shen, G., Zhang, J., Li, Y. (2015). Research on the Acoustic Emission and Metal Magnetic Memory Characteristics of the Crane Box Beam During Destructive Testing. In: Shen, G., Wu, Z., Zhang, J. (eds) Advances in Acoustic Emission Technology. Springer Proceedings in Physics, vol 158. Springer, New York, NY. https://doi.org/10.1007/978-1-4939-1239-1_39
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DOI: https://doi.org/10.1007/978-1-4939-1239-1_39
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