摘要
研究了铁磁构件在应力和地磁场共同作用下的磁记忆检测机理,从磁记忆的原理出发,根据铁磁材料所具有的自发磁化和磁畴的特点以及磁的产生机制,提出一种新的磁记忆检测技术的机理模型.以此模型为基础,得出试件表面所测得的磁场是缺陷处产生的漏磁场、试件本身感应磁场以及环境磁场矢量叠加的结果,并以矩形槽为例用matlab对磁场进行了仿真,很好的解释了磁记忆检测过程中的现象.
The mechanism of metal magnetic memory on ferromagnetic materials under loading and geomagnetic field was studied.Based on the principle of magnetic memory,the ferromagnetic materials with characteristics of spontaneous magnetization and magnetic domain,as well as the magnetic mechanism,we propose a new physical mechanism model of magnetic memory testing.Based on this model,we can conclude that the tested magnetic field on the surface is the result of vector superposition of the leakage magnetic field generated by defects,the inductive magnetic field of the specimen itself,and the environmental magnetic field.The magnetic field of a rectangular slot was simulated by matlab.The phenomena in the course of magnetic memory testing can be explained well.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2010年第1期16-19,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(10772061)
关键词
磁记忆
机理模型
漏磁场
磁畴
magnetic memory
physical mechanism model
magnetic leakage field
magnetic domain
