We investigated the possibility of axial escape of a nematic liquid crystal confined between two concentric cylinders with surface-imposed pure bend distortion. We found that this effect appears also in the case of strong anchoring. When the twist-anchoring is weak only at one of the surfaces, the critical thickness dc of the structure is affected by the saddle-splay elastic constant K24. Moreover, if the twist-anchoring is weak at the external surface, a transition of the first order was found, dc playing the role of an order parameter. Such a transition, characterized by bistability and hysteresis, may be driven by K24 and by the anchoring strength.
|Titolo:||Axial Escape of Nematics in Bend Cylindrical Configuration|
|Data di pubblicazione:||1993|
|Digital Object Identifier (DOI):||10.1142/S0217979293002274|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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