Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Disclination"”.
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Disclinations in Homogeneously Deformed Nematic Elastomers
… This thesis explores issues concerned with disclinations---which are tubular neighborhoods in which the material is isotropic and, thus, behaves like conventional rubber---in such materials. Following Fried and Todres, we consider a nematic elastomer that has been cross-linked in the …
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Geometry and topological phase of matter
… of the nematic field, which is physically a disclination, creates a nonzero geometry curvature in the disclination core. The leading coupling between the nematic field and gauge field includes a Wen-Zee term which links the geometry curvature with the gauge theory. In the second part of this …
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Instabilities and flow-induced structures in anisotropic systems
… and structures in LCLC solutions. Pure-twist disclination loops form in a range of shear rates as a consequence of the low twist elastic constant of LCLC solutions. We demonstrate that the size of the pure-twist disclination loops is governed by the balance between nucleation and annihilation …
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Liquid crystal adaptive planar optical devices
… LC to a pair of oppositely charged half-integer disclination lines. The voltage-based transient behaviour of the pincement transition correlated with the tuning curve response seen in voltage controlled LC tunable gratings. In order to reduce the hysteresis effect a new grooved substrate geometry …
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Direct UV-written waveguide devices
… is believed to be related to the dynamics of the disclination line formed along the waveguide axis with increase or decrease in supply voltage.<br/><br/>Finally, a description of the successful demonstration of UV-written single channels, y-splitters, and Bragg gratings into a novel flat fibre …
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Investigating intergranular fracture in nickel via atomistic simulations
… This mechanism relies on the generation of disclination dipoles due to GB migration, which can interact with the crack, causing it to advance or heal. We also demonstrate the healing of nanocracks in realistic 3D microstructures.
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Higher-order topological phases with crystalline symmetries
… in units of 1/n at corners and bulk disclination defects in symmetric HOTIs. Using spatially localized Wannier representations, we provide an intuitive microscopic theory to account for the mechanism of charge fractionalization. Via the K-theory classification framework, we …
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Methods of Analytical Mechanics in Continuum Mechanics: A unifying approach to growth, remodeling, and evolution of defects in simple and grade-one materials
L'abstract è presente nell'allegato / the abstract is in the attachment