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Collective rearrangement at the onset of flow of a polycrystalline hexagonal columnar phase | | Teresa Bauer
; Julian Oberdisse
; Laurence Ramos
; | | Date: |
22 Dec 2006 | | Journal: | Phys Rev Lett, 97 (25), 258303 | | Abstract: | Creep experiments on polycrystalline surfactant hexagonal columnar phases show a power law regime, followed by a drastic fluidization before reaching a final stationary flow. The scaling of the fluidization time with the shear modulus of the sample and stress applied suggests that the onset of flow involves a bulk reorganization of the material. This is confirmed by x-ray scattering under stress coupled to in situ rheology experiments, which show a collective reorientation of all crystallites at the onset of flow. The analogy with the fracture of heterogeneous materials is discussed. | | Source: | PubMed, pmid17280402 | | Other source: | [GID 168648] cond-mat/0612481 | | Services: | Forum | Review | Favorites | |
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