Auteur(s): Blanc C., Meyer C., Asnacios S., Kleman M., Lelidis I., Martin J.-L.
(Article) Publié: Philosophical Magazine Letters, vol. 85 p.641-648 (2005)
Ref HAL: hal-00020027_v1
DOI: 10.1080/14786430500402482
WoS: 000234228400004
Exporter : BibTex | endNote
9 Citations
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.