摘要
基于Hertz冲击理论,采用有限元仿真方法,建立了无摩擦条件下离散磁道式磁盘与磁头接触的动力学模型,研究了磁头径向寻道速度固定、法向冲击速度变化时,磁道材料力学特性对磁盘接触力场特性的影响规律,研究结果表明:随弹性模量增大,最大接触面积减小,最大接触力、最大VonMises应力和最大等效塑性应变均增大;屈服强度对力场特性的影响与接触力场Von Mises应力大小有关,只有当磁盘最大Von Mises应力达到磁道材料屈服强度时,屈服强度变化才会影响磁盘的接触力场特性。
Based on Hertz impact theory,a finite element model is built under frictionless condition using finite element analysis to investigate the effect of track material mechanical properties on the contact force field characteristics of discrete track recording disk.The analytical result shows that with the increase of elastic modulus,the maximum total contact area decreases,the maximum total contact force,the maximum Von Mises stress and the maximum equivalent plastic strain increase,and the effect of yield strength has relationship with the magnitude of Von Mises stress.Only when the magnitude of Von Mises reaches yield strength,do yield strength have effect on the contact force field characteristics of disk.
出处
《机械设计与制造》
北大核心
2012年第5期8-10,共3页
Machinery Design & Manufacture
关键词
离散磁道式磁盘
力学特性
力场特性
Discrete track recording disk
Mechanical properties
Force field characteristics
