摘要
制备了以羰基铁粉为磁性颗粒的硅油基磁流变液,使用Anton Paar Physica MCR 301流变仪测试其流变性能,用Bingham模型对磁流变液的流变性能进行拟合计算。实验表明,Bingham模型可较好地描述磁流变液的流变行为。随着磁场的增大,磁流变液的剪切应力和粘度显著增大。磁场不变时,随着剪切速率增加,磁流变液剪切应力增加不明显,符合剪切稀化的Bingham模型。通过对数拟合的方法,得出磁流变液剪切应力和电流的关系,在电流较小时,剪切应力呈指数增长,指数值约为1.42,随着电流的增大,剪切应力达到稳定值。
Silicone-based magnetorheological fluids （MRFs） were prepared with carbonyl iron powder as magnetic particles and its rheological performances were tested with Rheometer Anton Paar Physica MCR 301 and calculated with Bingham model.The experimental results show that Bingham model can well describe the rheological behaviors of MRFs.The shear stress and viscosity of MRFs increase significantly with the increase of magnetic field.However,when the magnetic field keeps the same,there is no apparent increase in shear stress with the increase of shear rate,which conforms to the Bingham model of shear thinning.The relationship between shear stress and electric current of MRFs was obtained by using logarithm fitting.It is found that the shear stress of MRFs firstly increases exponentially with the index value being about 1.42 when the current is small,but it tends to be stable as the current increases.
出处
《山东科技大学学报（自然科学版）》
CAS
2016年第6期43-48,共6页
Journal of Shandong University of Science and Technology(Natural Science)
基金
山东省自然科学基金项目(ZR2011EEM005)
关键词
磁流变液
流变性能
屈服应力
流变模型
磁场
magnetorheological fluid
rheological performance
yield stress
rheological model
magnetic field
