磁流变液屈服应力的管道流测试方法研究  

Measurement Methods of Magnetreological fluids′s Yield Stress in Fixed Magnetrode Configuration

作　　者：金昀[1] 唐新鲁[1] 王晓杰 张培强[1] 陈祖耀[1] 

机构地区：[1]中国科学技术大学

出　　处：《实验力学》1998年第2期168-173,共6页Journal of Experimental Mechanics

基　　金：国家自然科学基金;中科院回国留学人员择优支持资助

摘　　要：设计加工了一套磁流变液测试设备，并对由不同组分的铁粉／硅油组成的磁流变液进行了一系列的实验测试，结果表明：用钴纳米粒子修饰铁粉可以提高此种磁流变液的屈服应力，而用醋酸处理铁粉会严重减弱其屈服应力。In this paper, an experimental apparatus has been built to measure the yield strength of magnetoreological(MR) fluids. Several MR suspensions made of iron particle/silicone oil using different modifier were tested with this apparatus. The results show that a small amount of nanosized Co ultrafine particles as the modifier of the microsized iron particles could lead to a significant enhancement of the yield stress, The suspensions containing iron particle slightly eroded by the HAc could significantly weaken the yield stress compared with the suspension of the iron particle without being eroded.

关 键 词：磁流变液 屈服应力 管流 测试 铁粉/硅油 

分 类 号：O37[理学—流体力学]