中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 19 Special 3 December 2009 |
Q235 steel tubular member specimens
（1. College of Civil Engineering, Chang’an University, Xi’an 710061, China;
2. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
3. School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China;
4. College of Civil Engineering, Xi’an Euraisa University, Xi’an 710065, China）
Abstract:The magnetomechanical coupling tests were performed on Q235 steel tubular model specimens in NIM-2000HF magnetomechanical coupling equipment. The hysteresis loops were obtained in different magnetic fields and stresses. The magnetization curves were also achieved at different stresses. The influence of applied stresses on the hysteresis loops was investigated. The stress sensitive region and linear stress sensitive region of magnetic induction are determined for the model specimen according to the experimental data. The linear dependence relation of magnetic induction versus applied stresses is established, and the optimum magnetic field is determined in the stress sensitive range of magnetic induction, which builds a basis for nondestructive testing (NDT) of stress with the total magnetic flux for steel structure.
Key words: magnetomechanical coupling tests; hysteresis loops; stress sensitive region; magnetic induction; total magnetic flux; nondestructive testing
