On the inherent polycrystal stress concentration under external loading on example of single-phase α-Fe samples

Abstract

It is known that most structural materials are polycrystals. Under any loading, the structural features of the polycrystal may lead to the appearance and accumulation of microplastic deformation due to stress concentrations. This statement is part of a multiscale approach to describing the fracture process. The present development of computer engineering allows modeling of complex non-homogeneous objects, such as polycrystal. In this paper, a numerical model is developed for analyzing of the polycrystal stress state under mechanical loading. It is shown that inherent stress concentration takes place. The localization and statistical estimation of inherent stress concentration is made on the example of α-Fe polycrystal.