0517 電場下で一定応力を印加されたスメクティック液晶の変形開始時の過渡挙動(OS5-4 非ニュートン流体の流動現象,オーガナイズドセッション)

概要

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We have investigated transient responses in start-up large deformation of smectic-A liquid crystal (8CB) whose yield stress can be controlled with electric field strength and its current type. Shear rate change in the transient behavior with constant stress applied had been measured. Apparent viscosity responses were estimated and those strain dependency was examined. When larger stresses than the yield stress were applied, the viscosity changes were almost corresponded with the strain regardless of the stress applied. In the case of the nearly the same stress with the yield stress, typical response with high constant apparent viscosity was obtained in the small strain region before the large deformation started. Very small deformation and increase in the resistance to deformation had been observed when smaller stress was applied.
社団法人日本機械学会の論文
2009-11-06