Magnetorheological Fluid Materials Properties, Rheological Behaviour and Device Design in Valve Application

摘要

This paper presents a comprehensive review of magnetorheological (MR) fluidudtechnology in valve mode or flow mode application. Special emphasises are put on the three majorudelements in MR valve applications namely the MR materials, rheological behaviour and the deviceuddesign. In the duration of past ten years, the MR fluid materials and valve mode devices evolvedudfrom conceptual design to functional applications. Spiralling efforts is going on around the worldudcontributes to this huge steps of development. The accomplishment of this technology isudcontributed by the good design of the valve mode device as well as the refined properties of MRudfluid. Good MR fluid measured through its stability in sedimentation behaviour, the large ratio ofud‘on’ and ‘off’ state viscosity and maximum effects of shear stress under induction of magneticudfield. This paper first presents the material composition of MR fluid components for valve modeudapplication. Then, the rheological behaviour of MR fluid in valve mode environment is discussed.udFinally, this paper reviews the development of MR valve design and their applications in past tenudyears.