Non-destructive testing of steel bar stress based on metal magnetic memory technology
1. Rongzhi College of Chongqing Technology and Business University, Chongqing 401320, China; 2. College of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 3. College of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China; 4. China Merchants Chongqing Communications Technology Research ＆ Design Institute Co., Ltd., Chongqing 400067, China
Abstract：The non-destructive testing technique was introduced for reinforcement stress of bridge by employing a self-designed 3-dimensional magnetic field scanning device to detect and assess the magnetic induction strength leaked from steel concrete. The magnetic induction strength test of metal magnetic memory was carried out for the steel at different stress phase. The corresponding experiments were carried out for the concrete steel at different stress phase to analyze the influence of concrete on experimental results. The preliminary basis of reinforcement stress based on metal magnetic recording was obtained according to the relationship between magnetic induction strength and stress change .The results show that the reinforcement of steel can be determined by magnetic induction strength. In hardening stage, the amplitude of magnetic induction intensity curve is overlapped with the background magnetic field lines. In necked stage, the amplitude of magnetic induction intensity curve shows peak mutation. The leakage signals are still with high accuracy when the height exceeds 6 cm.
马惠香1, 周建庭2, 赵瑞强3, 辛景舟2, 李志刚4. 基于金属磁记忆技术的钢筋应力无损检测试验[J]. 江苏大学学报（自然科学版）, 2018, 39(3): 349-354.
MA Hui-Xiang-1, ZHOU Jian-Ting-2, ZHAO Rui-Qiang-3, XIN Jing-Zhou-2, LI Zhi-Gang-4. Non-destructive testing of steel bar stress based on metal magnetic memory technology[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2018, 39(3): 349-354.
2018, Vol. 39 
