一軸伸長流動場におけるウィスカーの流動配向分布―Jeffery理論との比較―
Orientation Distribution of Whiskers under Uniaxial Elongational Flow-Comparison with Jeffery Theory-
小林正俊・滝本淳一・小山清人
Kobayasi, Masatoshi / Takimoto, Jun-ichi / Koyama, Kiyohito
Change of orientation distribution of whiskers in polystyrene-potassium titanate whisker composite melts under uniaxial elongational flow was studied by using wide angle X-ray diffraction. The orientation distribution had a single peak in the flow direction at all elongational strain rates, and the peak monotonously became sharp as elongational strain increased. The distribution was found to be strongly dependent on strain. These experimental results were compared with prediction of Jeffery theory. Although Jeffery theory does not take account of interaction among fillers, we found that tendency of the theory resembles to that of the orientation distribution under elongational flow even in high concentration systems.
Key words: Flow-induced fiber orientation / Orientation distribution / Uniaxial elongational flow / Whisker / Jeffery theory