EVALUATION OF STRESS IN STEEL STRUCTURES USING ELECTROMAGNETIC METHODS BASED ON UTILIZATION OF MICROSTRIP ANTENNA SENSOR AND MONITORING OF AC MAGNETIZATION PROCESS
Przemyslaw Lopato
plopato@zut.edu.plWest Pomeranian University of Technology Szczecin (Poland)
Grzegorz Psuj
West Pomeranian University of Technology Szczecin (Poland)
Michał Herbko
West Pomeranian University of Technology Szczecin (Poland)
Michał Maciusowicz
West Pomeranian University of Technology Szczecin (Poland)
Abstract
In this paper the results of utilization of electromagnetic methods operating in low and high frequency range for evaluation of stress state and plastic deformation in steel elements are presented. In low frequency range Barkhausen noise and magnetic hysteresis loop method for evaluation of stress level and growth of plastic deformation changes were utilized. The methods allow to monitor parameters related to magnetization process under AC filed. Additionally in this paper the possibility of utilization of high frequency method for estimation of deformation extent (i.e. elongation) caused by stress will be presented. In this experiment the frequency response (the reflection coefficient S11) is measured. The strong relation of antennas resonant frequency to patch dimensions is utilized in order to obtain information about deformation of the sample.
Keywords:
nondestructive testing, stress measurement, sensor, ac magnetization, Barkhausen noise, microstrip antennaReferences
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Authors
Przemyslaw Lopatoplopato@zut.edu.pl
West Pomeranian University of Technology Szczecin Poland
Authors
Grzegorz PsujWest Pomeranian University of Technology Szczecin Poland
Authors
Michał HerbkoWest Pomeranian University of Technology Szczecin Poland
Authors
Michał MaciusowiczWest Pomeranian University of Technology Szczecin Poland
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