disclination

disclination

/dis·cli·na·tion/ (dis″klin-a´shun) extorsion.
References in periodicals archive ?
EN(A)] for the examined disclination ranges can be simply calculated, e.
18] reported that a few disclination loops could be seen in the initial quiescent state and within the bulk of the TLCP sample.
However, this explanation of the flow behavior in the first shear rate region can be considered as a first approach to the model of the shear induced complex development of disclination loops (defects) and of textures.
Thus, a toroidal configuration with the nematic field director arranged concentrically around a disclination line running through the center of the droplet [ILLUSTRATION FOR FIGURE 2 OMITTED] has been predicted theoretically (21, 22), but has always been found to be higher in energy than the bipolar configuration, under the common assumption that the three elastic constants are all equal.
Graziano and Mackley (16) report the continuous creation, deformation, relaxation and disappearance of disclination loops (line defects in this report) dependent on the loop orientation relative to the flow field.
Nematic LCPs contain disclinations, points of reorientation of the molecular director, and the degree of packing of the molecules in the vicinity of the disclination is lower than elsewhere in the structure (4).
Above a specific shear rate, they saw a distinct increase in disclination density.
Using these techniques, we present in this report results from the full three-dimensional morphology of bulk injection-molded LCPs sufficient resolution to detect disclination defects and to quantify their density.
The influence of micro(or meso-, or nano-)structures on the behaviour of the macrostructures is of great importance in applications in very different fields: fluids with bubbles, microcrack distribution in solids, crystal fluids, dislocations and disclinations, granular solids, porous media, and so on.
Topics of individual papers include computer simulations of the interaction of junction disclinations in nanomaterials with grain boundary vacancies, nonlinear corrected interactions of mesodefects and transition to macro-fracturing, high temperature mechanical characteristics of zirconia reinforced with carbon nanotubes or silicon carbide whiskers, the effects of heat treatment on acoustic properties of chromium polycrystals at low temperatures, iron alloys, investigation of the structure and properties of polymer layers on substrates through mechanical spectroscopy, lipidic aggregates, chemical spectroscopy of oil films on metallic and neutral substrates, and a history of the Russian study of anelasticity in solids.
Computer Simulation of the Interaction of Junction Disclinations in Nanomaterials with Grain Boundary Vacancies