CAJ | 학술논문

基于三维磁敏传感单元，研究了不同载荷激励下 FV520B钢试件表面三维自发射漏磁信号的变化及分布特征，分析了磁记忆信号的不同特征参量，并探讨了该特征参量与轴向应力之间的相关性。结果表明：三维弱磁信号在加载阶段和断裂后均呈现不同的变化特征，根据断裂后激变信号特征可对失效部位进行准确定位；磁记忆信号特征参量与外加应力之间存在一定的相关性， Bxave和KBz特征量与外加应力之间近似呈线性变化，根据该特征量的变化可以判断试件承受的工作应力；根据特征值KBz和Byave随应力的变化关系可以区分试件的弹、塑性变形阶段；三维磁记忆技术可为复杂零构件的损伤判定提供指导。
기우삼유자민전감단원，연구료불동재하격려하 FV520B강시건표면삼유자발사루자신호적변화급분포특정，분석료자기억신호적불동특정삼량，병탐토료해특정삼량여축향응력지간적상관성。결과표명：삼유약자신호재가재계단화단렬후균정현불동적변화특정，근거단렬후격변신호특정가대실효부위진행준학정위；자기억신호특정삼량여외가응력지간존재일정적상관성， Bxave화KBz특정량여외가응력지간근사정선성변화，근거해특정량적변화가이판단시건승수적공작응력；근거특정치KBz화Byave수응력적변화관계가이구분시건적탄、소성변형계단；삼유자기억기술가위복잡령구건적손상판정제공지도。
Based on the three-dimensional magnetic sensor,the variation characteristics of three-dimensional self-emitting magnetic signals of FV520B steel were studied under different tensile loads,and different characteristic parameters of magnetic signals were analyzed and the correlations between parameters and applied stress were explored.The results indicated that three-dimensional magnetic memory signals showed different variation features during tensile process and fracturing,and could accurately locate the site of failure according to the signal changes. Meanwhile,there was a certain correlation between the parameters and applied stress,the relationship between applied stress and parameters of Bxave and KBz was approximately linear and the applied stress of the specimens could be predicted based on the eigenvalues.The elastic and plastic deformation stages could be distinguished according to the relationship between stress and parameters of KBz and Byave .Three-dimensional magnetic memory technology would provide guidance on how to identifythe damage of complex components.