磁记忆检测力磁效应的有限元分析

本研究利用ANSYS软件建立了20钢小孔平板试样的三维有限元模型，结合力-磁耦合模型，利用间接法顺序耦合方式进行了金属磁记忆力磁效应的数值仿真，分析得出了带孔平板表面磁场强度法向分量出现过零点、切向分量出现峰值，当应力逐渐增大，这种现象越来越明显。本研究还对特征值磁场强度法向分量梯度K值与二维李萨如图作了分析，得出法向分量梯度K值和应力集中具有很强的相关性，二维李萨如图出现封闭区域，该区域的面积与应力大小并非简单的线性关系。

Finite Element Analysis of Stress-magnetic Effect of Magnetic Memory Testing

Combined with stress-magnetic coupling model, the finite element analysis was carried out on 20# steel plate specimen with a hole by indirect coupling sequence based on ANSYS. It was concluded that zero point of the normal component and peak values of the tangential component occured to the surface magnetic strength of the plate. With stress increasing, the phenomenon was more obvious. What＇ s more, the gradient values of the normal component and two-dimensional Lissajous figures were studied too, It was concluded that the gradient values of the normal component was much related to stress concentration, and the two-dimensional Lissajous figures have closed zone, the area of the closed zone was not simply linearly related to stress intensity.