A novel hierarchical multiscale model has been applied to simulate the thick-walled hollow cylinder tests in dry sand and to investigate the corresponding shear failures. The combined finite-element method and discrete-element method (FEM/DEM) model employs the FEM as a vehicle to advance the solution for a macroscopic non-linear boundary value problem incrementally. It is, meanwhile, free of c...

This report discusses the development and application of two alternative strategies in the form of global and sequential local response surface (RS) techniques for the solution of reliability-based optimization (RBO) problems. The problem of a thin-walled composite circular cylinder under axial buckling instability is used as a demonstrative example. In this case, the global technique uses a si...

The conventional elastic analysis of thick walled cylinders to final radial & hoop stresses is applicable for the internal pressures up to yield strength of material. The stress is directly proportional to strain up to yield point Beyond elastic point, particularly in thick walled cylinders. The operating pressures are reduced or the material properties are strengthened. There is no such existi...

This report discusses the development and application of two alternative strategies in the form of global and sequential local response surface (RS) techniques for the solution of reliability-based optimization (RBO) problems. The problem of a thin-walled composite circular cylinder under axial buckling instability is used as a demonstrative example. In this case, the global technique uses a si...

Introduction. Functionally graded materials are of great use, because heterogeneity properties enables to control the strength and rigidity structures. This has caused interest in topic world scientific literature. The construction solutions such problems depends significantly on type boundary conditions. In this paper, we consider equilibrium a thin-walled circular cylinder whose mechanical ch...

The paper presents a dynamic loading analysis of material carried out by the exploding wire method (EWM). A composite cylinder is chosen as an experimental sample. It thick-walled made polymethyl methacrylate with axial bore formed therein, pressed into aluminium shell. sample was loaded applying electric voltage to conductor in form copper placed inside An equation state for explosion obtained...