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Article Dans Une Revue Philosophical Magazine Letters Année : 2005

Do lamellar liquid crystals flow like solids?

Résumé

The role of dislocations in the deformation or flow of lamellar-phase liquid crystals is critically examined in the light of two studies. In the first, dislocation climb is directly observed under a compression normal to the layers. Two regimes of climb are evidenced. In the second study, lamellar phases are sheared in a rotating rheometer. Gliding screw dislocations carry a vorticity tensor component, which counterbalances plastically the applied vorticity. The similarities and differences between dislocation processes in solid and lamellar liquid crystals are discussed.
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Dates et versions

hal-00020027 , version 1 (03-03-2006)

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Christophe Blanc, Claire Meyer, S. Asnacios, M. Kleman, Ioannis Lelidis, et al.. Do lamellar liquid crystals flow like solids?. Philosophical Magazine Letters, 2005, 85, pp.641-648. ⟨10.1080/14786430500402482⟩. ⟨hal-00020027⟩
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