CAJ | 학술논문

为了揭示磁流变液宏观响应特性下的深层次物理背景，从而为研制高性能磁流变液提供指导，基于磁偶极子理论，结合铁磁颗粒的链化机理，提出了磁流变液双链密排微结构模型。在外加磁场下，当铁磁颗粒沿磁场方向形成链状结构后，通过考虑相邻链之间的影响，假定磁偶极子链发生剪切变形后的倾斜角度服从指数分布，从磁偶极子能量的角度推导了磁流变液双链密排微结构模型的剪切屈服应力公式。分析了磁感应强度、铁磁颗粒体积分数、铁磁颗粒尺寸以及颗粒包覆层厚度等主要影响因素与磁流变液剪切屈服应力的关系，并进行了试验验证。结果表明，该模型与试验结果吻合很好，可以反映各主要因素对磁流变液剪切屈服应力的影响。
위료게시자류변액굉관향응특성하적심층차물리배경，종이위연제고성능자류변액제공지도，기우자우겁자이론，결합철자과립적련화궤리，제출료자류변액쌍련밀배미결구모형。재외가자장하，당철자과립연자장방향형성련상결구후，통과고필상린련지간적영향，가정자우겁자련발생전절변형후적경사각도복종지수분포，종자우겁자능량적각도추도료자류변액쌍련밀배미결구모형적전절굴복응력공식。분석료자감응강도、철자과립체적분수、철자과립척촌이급과립포복층후도등주요영향인소여자류변액전절굴복응력적관계，병진행료시험험증。결과표명，해모형여시험결과문합흔호，가이반영각주요인소대자류변액전절굴복응력적영향。
In order to reveal the deep physical background of the macroscopic responses of the mag-netorheological fluid,and thus provide a guidance for the development of high performance magne-torheological fluid,the compact two-column microstructure model of magnetorheological fluid is proposed considering the chain mechanism of ferromagnetic particles based on the magnetic dipole theory.Under the external magnetic field,the ferromagnetic particles form into the chain-like struc-ture along the direction of magnetic field.The interactions between adjacent chains are considered, and it is assumed that the distribution of the chains obeys an exponential distribution.Finally,the yield shear stress formula is developed from the perspective of energy of the magnetic dipole,and the relationships between the yield shear stress and the main influencing factors,such as magnetic induc-tion intensity,volume fraction,size and coating thickness of ferromagnetic particles,are also ana-lyzed.These relationships are verified using the experimental data.The results show that the pro-posed model agrees well with the experimental data,and the model can reflect the influences of the main factors on shear yield stress.