Mechanics

Elastic Mode Mixity Parameters for Semi-Elliptical Crack under Biaxial Loading

Authors: Shlyannikov V. N., Tumanov A. V.

A method for solution and result of calculations for the elastic mode mixity parameters. The energy release rate is suggested for complex loading including modes I+II+III. The behavior of the edge inclined semi-circular and semi-elliptical surface cracks is considered under biaxial loading of arbitrary direction. The algorithm is based on application to the full elliptical crack solution of the correcting functions accounting for the crack front intersection of the plate free surface.

Hemodynamics and Mechanical Behavior of Pathologically Tortuous Carotid Arteries

Authors: Pavlova O. E., Ivanov D. V., Gramakova А. А., Моrozov K. M., Suslov I. I.

The numerical analysis of blood flow through anatomically real healthy and pathologically tortuous bifurcation of human carotid was carried out. Experimental velocity field data in carotid bifurcation were obtained using noninvasive technology. 3D computer models based on computer tomogram were built. The material of the wall is assumed to be linear isotropic.

Stability of Vertical Mountain Developments in Elastic Viscous-Plastic Files with Porous Structure

Authors: Gotsev D. V., Stasjuk A. N.

The mathematical model of the basic intense-deformed condition of the vertical mountain development, considering elastic-viscousplastic properties of a file, and also porous structure of a material is constructed. Within the limits of the exact three-dimensional stability equations stability of the basic condition of vertical development in files of rocks with the compressed time is investigated. The estimation of influence on size of critical pressure of parametres of hills is given.

 

Variantof the Descriptionof the Intense-Deformed Stateofthe Plane with the Semi-Infinite Flaw on the Basis of the Concept of the Stratum of Interaction at the Normal Separation

Authors: Glagolev V. V., Glagolev L. V., Markin А. А.

The flaw is considered as a physical slit, and a material lying on continuation of a slit, shapes an interaction stratum between its coast sides. The given approach, unlike the concept of a mathematical slit, allows to establish laws of change of voltages and strains in deadlock field. It gives the chance to specify the values of exterior loadings corresponding to transition of a stratum in a plastic state.