基于力磁效应的磨削粗糙表面接触性能的研究

Study on Contact Performance of Grinding Rough Surface Based on Force-Magnetic Effect

根据微凸体的力磁效应,采用45#钢磨削粗糙表面轮廓数据,利用ANSYS建立了二维粗糙表面和周边空气的实体模型和二维有限元模型,分析了粗糙表面与刚性平面接触,在0~10 MPa法向载荷下的接触性质。并在接触分析的基础上结合力磁耦合模型,运用APDL语言进行静磁分析,获得一定的提离高度下,接触表面上方空气层的漏磁场分布。仿真结果表明:根据漏磁场的法向分量的过零点或切向分量的极值点,可以判断出接触区域的个数,及其接触区域的应力水平,有效证明了应力的磁导率效应的理论以及力磁耦合模型的适用性,以及磁记忆检测技术用于研究结合面接触特性的可行性。

According to the force and magnetic effect of a micro convex body,and using 45#steel grinding of rough surface profile data,the two-dimensional rough surface and surrounding air solid model and the two-dimensional finite element model are established by ANSYS in this paper.The contact property of rough surface and rigid plane contact under 0-10MPa normal load is then studied.On the basis of contact analysis,combined with the force magnetic coupling model,the static and magnetic analysis is carried out by using the APDL language,and the leakage field distribution of the air layer above the contact surface is obtained at a certain height of lift off.The simulation results show that the number of the contact area and the stress level of the contact area can be judged according to the zero or the extreme points of the tangential component of the normal component of the leakage magnetic field.The theory of magnetic permeability effect of the stress and the applicability of force-magnetic coupling model are proved effectively,and the feasibility of magnetic memory detection technology to study the surface contact characteristics is proved.