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OC-M1: Room C / Nondestructive Evaluation and Advanced Signal Processing 3
Time:
Wednesday, 15/Nov/2023:
9:00am - 10:50am
Session Chair: Prof. Antonello Tamburrino Session Chair: Prof. Tetsuya Uchimoto
Presentations
9:00am - 9:30am ID: 327 / OC-M1: 1 Regular_Abstract (short paper) Submission Topics: Nondestructive Evaluation (Electromagnetic and Mechanical methods) and Advanced Signal Processing (NEASP) Keywords: Yield strength, Low carbon steels, magnetic properties, magnetic sensor
NON-DESTRUCTIVE EVALUATION OF YIELD STRENGTH ON LOW CARBON STEELS BY USING FSES METHOD
Yuji TSUCHIDA
Oita University, Japan
This paper presents our proposed frequency sweeping excitation and spectrogram method (FSES method) by magnetic sensor for non-destructive evaluation of yield strength on low carbon steels. This method can evaluate the magnetic properties of low carbon steels whose yield strength were changed by induction heating. It was examined by our proposed method that the degrees of yield strength on low carbon steels were varied depending on conditions of induction heating.
9:30am - 9:50am ID: 357 / OC-M1: 2 Regular_Abstract (short paper) Submission Topics: Nondestructive Evaluation (Electromagnetic and Mechanical methods) and Advanced Signal Processing (NEASP) Keywords: Magnetic Flux Leakage (MFL) testing, Wire rope
SIMULATION ANALYSIS OF MAGNETIC FLUX LEAKAGE (MFL) TESTING FOR WIRE ROPE BASED ON MULTILAYER HELICAL STRUCTURE
Xiaoyuan JIANG, Yanhua SUN, Mengqi LIU, Lingsong HE
School of Mechanical Science and Engineering, Huazhong University of Science and Technology, 430074, Wuhan, China
For magnetic flux leakage testing, various variants of the same-diameter steel wire rope were developed respectively, and the simulation results show that different modeling structures of wire rope result in different distributions of internal magnetic field and defect leakage magnetic field. Therefore, a comprehensive study on the magnetic field transmission and defect leakage magnetic field characteristics of steel wire rope is required.
EVALUATION OF DEBONDING BETWEEN REBAR AND CONCRETE WITH MAGNETIC FORCE INDUCED VIBRATION EVALUATION (M5) METHOD
Pawel Karol FRANKOWSKI, Tomasz CHADY
West Pomeranian University of Technology, Szczecin, Poland
This paper aims to present the effectiveness of the new nondestructive method dedicated to detection of the rebar-concrete debonding. The Magnetic Force-Induced Vibration Evaluation (M5) method is designed to detect changes caused by corrosion. The method's concept is to directly induce rebars' vibrations (not a whole structure), measure them, and analyze the frequency spectrum changes. The presented in the paper experiments show that the structure condition correlates with its response to electromagnetic excitation at different frequencies. In the purpose to avoid the damping of the mechanical wave by the concrete cover, a magnetic coupling was implemented. Such a solution allowed to increase the sensitivity and reproducibility of measurements significantly. The work presents the principle of operation of the M5 method as well as the results of the most critical tests.
10:10am - 10:30am ID: 258 / OC-M1: 4 Regular_Abstract (short paper) Submission Topics: Nondestructive Evaluation (Electromagnetic and Mechanical methods) and Advanced Signal Processing (NEASP) Keywords: MFL, magnetic field sensor, surface condition, NDT
INFLUENCE OF SURFACE CONDITION ON SMALL SIZED DEFECTS DETECTION USING MAGNETIC FLUX LEAKAGE METHOD
Hiroaki KIKUCHI, Kohshi URAZAKI, Shota ONODERA
Iwate University, Japan
We investigated an influence of surface condition of steel specimen on nondestructive testing to detect small defects using magnetic flux leakage with highly sensitive magnetic field sensor. When the defect diameter becomes smaller, the leakage flux distribution caused by the defect becomes equal to the background magnetic field distribution, which makes defect detection difficult. The background noise is not attributed to environmental magnetic noise or electrical noise, and reflects some magnetic characteristics of the specimen.
