针对磁流变胶泥材料在外加磁场作用下悬浮相内磁相互作用机理和材料设计参数不确定的问题，根据磁流变材料微观偶极子理论，建立铁磁颗粒在磁场中的平板单链模型，结合链与磁场夹角之间满足指数分布的规律，得出了磁流变胶泥材料剪切屈服应力的理论表达式；根据磁流变胶泥材料的实验数据，对理论分析模型进行了修正，使模型能更好地预测不同影响因素下的剪切屈服应力值；对磁流变胶泥剪切屈服应力与铁磁颗粒、质量分数、基体粘度等因素进行分析，为高性能磁流变胶泥材料的设计、制备提供理论指导。
This paper presents a model to solve the uncertain problem of magnetic interaction mechanism,and the composition design of dispersed phase for magnetorheological (MR)glue under external magnetic field. Based on the microscopic magnetic dipole theory,a parallel plates single chain model for ferromagnetic particles in a magnetic field is established.Theoretical expression of shear yield stress for MR glue is obtained,on condi-tion that the angle between magnetic chain and magnetic field direction satisfies exponential distribution law.By means of experimental data,the theoretical expression is optimized to better predict the yield stress under vari-ous influence factors.At last,the relationship between yield stress of MR glue and its influence factors (i.e., particle size,mass fraction,and viscosity)is analyzed,which provides a theoretical guidance for design and preparation of MR glue.
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