One solution of an axisymmetric problem of the elasticity theory for a transversely isotropic material

A numerical-analytical method based on approximation of the sought solution by a system of basis functions is proposed to solve the boundary-value problem of axisymmetric deformation of articles made of a transversely isotropic material. An algorithm for constructing polynomial functions on the basis of invariant-group solutions is described.     

The axisymmetric contact problem of the theory of elasticity for a half-space in the presence of body forces

We consider the axisymmetric problem of determination of the stress-strain state in an elastic half-space in the case of a circular line of separation of the boundary conditions on the boundary plane z = 0. We assume that on the entire boundary z = 0 the tangential stress _rz = 0, while inside the circle r a (z = 0) the normal displacement u_z is known and in its exterior the normal stress _z is given. In addition, we assume that body forces are acting in the half-space. The investigation of problems of similar kind presents interest in connection with the application of A. A. Il'yushin's method of elastic solutions to the problem of the indentation of punches into a nonlinear-elastic, in particular, into an elastoplastic half-space.Translated from Zhurnal Prikladnoi Mekhaniki i Tekhnicheskoi Fiziki, No. 4, pp. 110–115, July–August, 1971.The author wishes to thank M. Ya. Leonov for his valuable suggestions during the preparation of this paper.     

Axisymmetric problem for a half-space in the micropolar theory of elasticity

The general solution of the equilibrium equations is obtained for a half-space subjected to arbitrary normal pressure. Four particular cases, including a concentrated force, are considered in detail. The singular parts of the displacements, rotations and stresses are obtained for the case of a concentrated force. The corresponding classical results have been derived. The graphs for various physical and geometrical quantities have been drawn to illustrate the micropolar effects.

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Zusammenfassung Die ellgemeine Lösung für Gleichgewicht eines Halbraums unter beliebigem Normaldruck wird gefunden. Vier Spezialfälle darunter eine konzentrieste Kraft werden genauer untersucht. Für diesen Fall werden die Verschiebungen, Drehungen und Spannungen gefunden. Die entsprechenden klassischen Lösungen wurden erhalten. Zur Illustration der Mikropolareffekte wurden Diagramme der verschiedenen physikalischen und geometrischen Grössen gezeichnet.

     

An elasticity solution for axisymmetric problem of finite circular cylinder

In this paper,the complete double-series in the closed region expressing the double-variable functions and their partial derivatives are derived by the H-transformation and Stockes’transformation.Using the double-series,a series solution for the axisymmetric boundary value problem of the elastic circular cylinder with finite length is presented.In a numerical example,the cylinder subjected to the axisymmetric tra(?)s with various loaded regions is investigated and the distributions of the displacements and stresses are obtained.It is possible to solve the axisymmetric boundary value problems in the cylinderical coordinates for other scientific fields by use of the method presented in this paper.     

The axisymmetric problem of the theory of elasticity for a thick-walled cylinder of finite length

International Applied Mechanics -     

An analytical solution of an axisymmetric problem of deforming an isotropic half-space with an elastic fixed boundary under the action of a distributed load

An analytical solution to the axisymmetric problem on the action of a distributed load on an isotropic half-space when the load is given by a function dependent on the radial coordinate is obtained. The surface of the half-space is elastically fixed outside the circular domain of load application, the shear stresses are absent along the entire boundary, and the stresses vanish at infinity. At the boundary and inside the elastic half-space, the solutions are represented by the formulas for the stress tensor components and for the displacement vector components.     

Numerical solution of the dynamic problem of elasticity for bodies with concentrated masses

On the basis of the virtual-displacement and the DAlembert principles, a new initial-boundary-value problem is formulated for the system of dynamic equilibrium equations of two bodies contacting with friction over a constant area. Their masses are assumed to be distributed with certain densities over the contact surfaces. An equivalent generalized problem is formulated. Classes of discontinuous functions of the finite-element method are used to construct computational schemes of high order of accuracy.__________Translated from Prikladnaya Mekhanika, Vol. 40, No. 12, pp. 65–75, December 2004.     

Numerical solution of Cauchy problems in linear elasticity in axisymmetric situations

An iterative method for solving axisymmetric Cauchy problems in linear elasticity is presented. This kind of problem consists in recovering missing displacements and forces data on one part of a domain boundary from the knowledge of overspecified displacements and forces data on another part of this boundary. Numerical simulations using the finite element method highlight the algorithm’s efficiency, accuracy and robustness to noisy data as well as its ability to deblur noisy data. An application of the inverse technique to the identification of a friction coefficient is also presented.