Abstract
Stress is one of the important factors that cause fatigue and fracture of ferromagnetic components, and its accurate measurement is of great significance to ensure the safety and reliability of components. Accordingly, a set of alternating magnetic field stress measurement system was designed and developed. The system includes a measurement sensor, DDS signal excitation module, signal conditioning module, signal acquisition, and processing module. The system was used to carry out uniaxial tensile testing of Q235 steel, and the influence of different testing parameters on the testing signal was studied. The research results show that: in the elastic stage, there is a good linear relationship between the real part of the detection signal and the tensile stress. This characteristic quantity can be used to evaluate the stress of ferromagnetic materials; In addition, the correlation coefficient and sensitivity of different detection parameters were compared through linear fitting analysis, and a set of best detection parameters were obtained. Under this parameter, the correlation coefficient reaches 0.991, and the sensitivity is 7.318 mV/kN. The above research provides test methods and techniques for ferromagnetic material stress measurement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: The Journal of Strain Analysis for Engineering Design
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
