Mechanics |
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1997, No. 4
B.I. Astafev, Y.N. Radayev, L.V. Stepanova
ON THE UNLOADING OF THE DUGDALE CRACK IN A STEEL SHEET
The paper is devoted to the unloading of a mode I crack in a sheet under plane stress conditions while retaining in the framework of the Dugdale model of the plastic flow localization. The residential stress and displacement fields caused by the intensive plastic flow near the crack are also investigated.
A.V. Verevochnikov, N.G. Migranov
The purpose of work was the construction of the generalized thermodynamic potential (GTP), circumscribing a behaviour nematic liquid crystal (NLC) far from a thermodynamic equilibrium. GTP is analogue free energy for equilibrium systems. Knowing GTP, by his minimization, it is possible to show a possibility of existence of a various sort of dissipative structures. Near to a point of bifurcation the hydrodynamics NLC can be simplified owing to appearance of a slow style, which is dominating. This style is described slowly by varying complex amplitude w, through which all hydrodynamic variables both whose absolute value express and phase are connected to intensity and position convective rolls accordingly.
E.N. Kozhevnikov
DISPERSION OF LESLIE VISCOUS COEFFICIENTS IN NEMATIC LIQUID CRYSTAL
Relaxation processes in Nematic Liquid Crystal under shear waves are described on the base of molecular-kinetic model. Frequency dependence and dispersion temperature dependence of Leslie viscous koeficients are determined.