MAGNETIC NONDESTRUCTIVE TESTING TECHNIQUES OF CONSTRUCTIONAL STEEL
Steel is a kind of ferromagnetic material, which is extensively applied in such fields as buildings, bridges, railways, machines and lifeline engineering etc. Those engineering structures built of constructional steel will unavoidably experience some damages during their service lifetime, thus which will influence the distribution regularity of internal forces in structures, result in overstresses, cause the local failure of structures, and even lead to collapse of the whole structure. Therefore, it is a pressing topic to study how to directly evaluate the real-time stressed states of structural members, damages and steel characteristics in present structural health monitoring and diagnosing fields. And the achievements of this research will be of theoretical significance and of application value of engineering. This paper summarizes varieties of new magnetic nondestructive testing techniques used in constructional steel, respectively investigates the testing principles, characteristics and application for the magnetic Barkhausen noise technique, magnetic acoustic emission technique, magnetic flux leakage technique, magnetic memory technique and magnetic absorption technique, and points out the problems present in the application of these new techniques to actual testing and the further research objective.
magnetic nondestructive testing technique damages steel stress structural health monitoring
Er-Gang Xiong She-Liang Wang Qian Zhang
College of Civil Engineering, Changan University, Xian 710061, P.R. China Schoo of Civil Engineering, Xian University of Architecture & Technology, Xian 710055, P.R. China College of Civil Engineering, Xian Euraisa University, Xian 710065, P.R. China
国际会议
广州
英文
1220-1227
2009-11-28（万方平台首次上网日期，不代表论文的发表时间）