Analysis of the stressed-strained state of the foundation-shell at interaction with the elastic-plastic medium

Abstract

On the basis of modern numerical implementations of the finite element method the article presents the justification of the adequacy of the method of solving the problems of structures straining in their contact interaction with the elastic-plastic nonlinear soil medium.
 Compatible calculations of structures and nonlinear bases, which are described by modern mechanical and soil models within one problem is a significant technical problem.
 The solution of the assigned tasks is possible only within the framework of numerical methods, the most common of which is the finite element method (FEM). The construction of the computational finite element model raises many complex questions that require additional detailed study. In addition, the compliance with the state building norms and regulations is an important factor for further practical use.
 The use of numerical methods in the calculation of machines and structures, taking into account their interaction with the elastic-plastic medium is largely determined by the complexity or even impossibility of analytical calculation due to the complexity of structural schemes, heterogeneity of material features, uneven soil layers, implementation of step-by-step work execution technologies and so on.
 The combination of the latest achievements in the field of structural mechanics and soil mechanics is a promising direction for the development of effective approaches to building discrete models of space systems “structure-nonlinear base” for solving applied problems.
 The use of the developed method allows to significantly specify the structures stress state interacting with the soil base, and to significantly specify the impact on the calculated level of the base bearing capacity. Only the simultaneous consideration of the nonlinear resistance of the soil base together with the plasticity and the structure destruction in the numerical simulation of the foundation-shell load provided good agreement with the natural experiment data as to the type of the boundary state and the bearing capacity level.

Determining the patterns of asymmetric interaction of plastic medium with counter-directional metal flow

“…However, the use of numerical methods in the calculation of machines and structures, taking into account their interaction with the elastoplastic medium, is largely determined by the complexity or even the impossibility of analytical calculations due to the complexity of structural schemes, heterogeneity of material properties, and unevenness of soil layers. Solving the problems considered in [5] is possible only within the framework of numerical methods, the most common of which is the finite element method. Some ways to overcome such difficulties are proposed in [6] using a procedure for constructing computational models of joint deformation and the mutual influence of rigid structures and the plastic external environment.…”

“…Our review of the literature [2,5,17] reveals that new challenges arise related to the latest experimental and theoretical research in the mechanics of deformed solids and mechanics in general. These statements suggest that there is a need to more fully use modern achievements of theory and science in solving complex technological problems.…”