Design and Experiment of Electromagnetically Induced Acoustic Emission for Metal Crack Detection

2011 ◽  
Vol 291-294 ◽  
pp. 1278-1283
Author(s):  
Chuang Zhang ◽  
Su Zhen Liu ◽  
Qing Xin Yang ◽  
Liang Jin ◽  
Yu Huai Kan
Keyword(s):  
Acoustic Emission ◽  
Theoretical Analysis ◽  
Crack Detection ◽  
Pulse Current ◽  
Engineering Application ◽  
Stress Waves ◽  
Current Generator ◽  
Acoustic Emission Technique ◽  
Expected Effect ◽  
Large Pulse

A new electromagnetically induced acoustic emission technique (EMAE) is presented in this paper. It does nondestructive detection with the effect of dynamic electromagnetic loading to generate a stress field stimulating stress waves from the defects. Theoretical analysis and experiment of the EMAE is carried out. The large pulse current generator which is used in electromagnetically induced acoustic emission (EMAE) is designed based on the energy storage of the capacitor. Applying to the EMAE experiment, it can achieve the expected effect and locate the defect in the aluminium plate. This work laid a good foundation for the engineering application of EMAE.

Characterisation of Partial Melting and Solidification of Granite E93/7 by the Acoustic Emission Technique

2008 ◽  
Vol 1107 ◽  
Author(s):  
Lyubka M. Spasova ◽  
Fergus G.F. Gibb ◽  
Michael I. Ojovan
Keyword(s):  
Acoustic Emission ◽  
Phase Transformations ◽  
Partial Melting ◽  
Frequency Spectrum ◽  
Stress Waves ◽  
Radioactive Wastes ◽  
Deep Borehole ◽  
Acoustic Emission Technique ◽  
Ae Signals ◽  
Melting And Solidification

AbstractThe acoustic emission (AE) technique was used to detect and characterise the processes associated with generation of stress waves during melting and solidification of granite E93/7 at a pressure of 0.15 GPa. The AE signals recorded as a result of partial melting of the granite at a temperature of 780°C and subsequent solidification during cooling were distinguished from the equipment noise and their parameters used to characterise the AE sources associated with the phase transformations during melting and solidification of the granite. The mechanisms generating AE during granite melting were differentiated by AE signals with their highest peaks in the frequency spectrum at 170 and 268 kHz. The transformation of the liquid into glass during solidification of the partially melted granite generated AE waves in an essentially broad range of frequencies between 100 and 300 kHz. This preliminary work demonstrates the potential of the AE technique for use in applications related to deep borehole disposal of radioactive wastes.

Optimizing the Acoustic-Emission Technique for Examining the Strength of Welded Joints

Vestnik MEI ◽  
2017 ◽  
pp. 96-101
Author(s):  
Viktor V. Nosov ◽  
◽  
Alsu R. Yamilova ◽  
Nikolay A. Zelenskiy ◽  
Ilya V. Matviyan ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Welded Joints ◽  
Acoustic Emission Technique

Evaluation of Severely Damaged Reinforced Concrete Beam Repaired with Epoxy Injection using Acoustic Emission Technique

2021 ◽  
pp. 102890
Author(s):  
Soffian Noor Mat Saliah ◽  
Noorsuhada Md Nor ◽  
Noorhazlinda Abd Rahman ◽  
Shahrum Abdullah ◽  
Mohd Subri Tahir
Keyword(s):  
Acoustic Emission ◽  
Reinforced Concrete ◽  
Concrete Beam ◽  
Reinforced Concrete Beam ◽  
Acoustic Emission Technique
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