Solution of tasks for elastoplastic transversal isotropic bodies

In this article: the theorem has been proven for existence and uniqueness of the generalized solution of elastoplastic boundary problem based on the theory of plastic yielding of transversal isotropic bodies from the loading surface in the deformation and stress space.

GROUND STRENGTHENING METHOD BY MULTISTAGE LOCAL CONSOLIDATION

Authors are investigating a ground strengthening method, which effectively consolidates the construction area of requisite minimum in a short time by local consolidation for the soft ground. In this paper, Authors research that the effect of increasing the strength of soft ground by using the three-dimensional elasto-plastic finite element analysis when the area of local loading is gradually changed. First, it was found that the strength of the soft ground just below the local loading surface increased with a short time by the local consolidation and ultimate bearing capacity increases to 2.6 times as much as the initial bearing capacity by the multistage loading. Next, analysis was carried out in the case of the multistage loading with cyclic loading. In the reloading process, loading area is reduced to 1/3 and 1/6 of the loading area of the previous stage. In this case, the ultimate bearing capacity increases to 8.25 times as much as the initial bearing capacity. In conclusion, it was found that the strength of the soft ground just under the loading surface is considerably increased by multistage local loading with reducing the loading area.

Formation of the Stress Field in the Vicinity of a Single Defect under Shock (Impulse) Loading

The formation of residual stresses in the vicinity of a single defect of continuity in the process of intense impulse loading surface with considerable distance from the defect is examined. Modeling is carried out within the framework of large elastic-plastic deformation. In the vicinity of the defect there is level of stress, leading to its elimination.