Abstract

This Brief Report analyzes the dependence of helix deformation modes on the flow alignment properties of sheared cholesteric liquid crystals. It is predicted that the helix of nonaligning cholesterics will not unwind. On the other hand, for flow-aligning cholesterics the helix will unwind only if the shear rate is larger than a pitch-dependent threshold. \textcopyright{} 1996 The American Physical Society.

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