磁化状态对力磁耦合关系的影响分析

摘要

The influences of magnetization state on magnetomechanical coupling relationship were analyzed both at the micro level and at the macro level.From the microscopic perspective,under dif-ferent magnetization states,the changing rules were analyzed,that the domain structure of ferromag-netic components was subj ected to applied stresses was analyzed.From the macroscopic perspective, based on approaching principle,the process which a applied stress made the initial magnetization state approached nonhysteresis magnetization state constantly was explained,where the closed direction is determined by the sizes of differences between nonhysteresis magnetization and initial magnetization. If the differences are greater than zero,the magnetization will increase with stress increasing,and if the differences is less than zero,the situation is versa,but nonhysteresis magnetization will change momently with the changes of stresses.Finally,in order to further verify theoretical analysis experi-mentally,a static load tensile test was applied to Q235 steel with three different magnetization states, the experimental results are consistent with theoretical analyses.%从宏观和微观两方面分析了磁化状态对力磁耦合关系的影响.从微观角度,在不同的磁化状态下,分析了铁磁构件磁畴结构在外加应力作用下的变化规律;从宏观角度,基于接近原理解释了外加应力是使初始磁化状态不断向无滞后磁化状态靠近的过程,而靠近的方向由无滞后磁化强度与初始磁化强度的差值决定,如果差值大于零,则磁化强度随应力的增大而增大,如果差值小于零,则反之,但无滞后磁化强度又随应力的变化时刻发生变化.为了验证理论分析结果,对三种不同初始磁化状态下的Q235钢进行静载拉伸试验,试验结果与理论分析具有一致性.