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Stress of Heavy-Wall Tubing Cylindrical Pipes Taking into Account the Gravity for Materials with Difficult Rheology

Authors: Sporykhin A. N., Gotsev D. V., Plotnikov L. G.

Within a method of small parametre the field of stresses of heavy tubing cylindrical pipes is investigated at modelling of a material by the incompressible elasticis viscous-plastic environment. The estimation of influence on size of a plastic zone physicomechanical design parametres is given.

One-Demential Automodel Problem about Impact of Rigid Body with Elastoplastic Half-Space

Authors: Mantsybora A. A., Semenov K. T.

The one-demential automodel problem about impact of rigid body with elastoplastic half-space is considered. In the case of plastic deformation is accumulated inside Riman simple wave is presented. The solution with a possible wave picture, when perturbation in the environment propagate by means of two elastic waves and one plastic simple wave, is shown. 

Multimodulus Behevior of the Grained Composites on the Base of Unsaturated Polyetheres

Authors: Bessonov D. E., Zezin Y. P., Lomakin E. V.

The results of the investigation of elastic properties of grained composite based on the unsaturated polyetheres were presented. This material was designed to substitute natural rocks in civil and mechanical engineering. The experimental values of elastic modulus and the Poisson‘s ratio under the tension and compression were obtained. It was shown that the investigated composite exhibits the dependence of elastic properties on the type of the stress state.

The loading parameters calculation of a hollow sphere at the large elastocreep deformations

Authors: Murashkin E. V.
We presented a model of large elastocreep deformations. Separation of Almansi strain tensor is determined by the quadratic form of reversible and irreversible components. We consider spherically symmetric deformation of a hollow sphere in the steady creep process. Numerical solution of boundary-value problem was obtained. A method for determining loading force on the deformed state was proposed. Functions of the external loading force according to the laws of a given change in the displacement field were constructed.