静拉伸条件下螺纹联接件三维弱磁信号研究  

Study into Three-Dimensional Weak Magnetic Signal of Bolted Connection Under Static Tension Condition

作　　者：张卫民[1] 涂青松[1] 殷亮[1] 

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《北京理工大学学报》2010年第10期1151-1154,1179,共5页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(50875023)

摘　　要：针对螺纹联接件应力分布不均匀和局部塑性变形问题,提出了利用地磁场环境下试件表面三维弱磁信号进行检测的新方法.在静拉伸试验机上对螺纹联接件进行了拉伸实验,利用二维磁记忆检测传感器实现了螺纹法向、轴向和切向三维弱磁信号的在位测量.利用有限元方法对螺纹的法向、轴向和切向应力应变进行了计算.结果表明,三维弱磁信号中,轴向弱磁信号和应力之间具有较好的相关性.To study the non-uniform stress and plastic deformation in threads of a bolted connection,a new method was proposed to detect three-dimensional weak magnetic signals under static tension loads within geomagnetic field.The triangular thread with a special hatch on the nut was used for static tension testing,and a two-dimensional magnetic memory detecting transducer was used to get weak magnetic signals of all the three dimensions on site.Then,the stress and strain of the thread was calculated using finite-element-method and the relationship between weak magnetic signals and stresses of the three dimensions was analyzed.The result shows that there exists a strong correlation between the magnetic signals and stress.

关 键 词：金属磁记忆 三维弱磁信号 螺纹联接件 静拉伸 

分 类 号：TH140.7[一般工业技术—材料科学与工程]