Stress Concentration in Construction Elements of Polycrystalline Materials at Various Stress States

Abstract

Stress Concentration in Construction Elements of Polycrystalline Materials at Various Stress States

Evdokimov E.E., Arzamaskova L.M., Klimenko V.I., Konovalov O.V.

Incoming article date: 08.02.2019

The paper is concerned with relevant stress concentration research in construction elements made of structurally heterogeneous materials. On the base of the physico-mechanical model of structurally heterogeneous body (polycrystal) , with the use of finite elements method, stress distribution in construction elements made of polycrystalline metals with hexagonal lattice (magnesium, titanium, zinc) is investigated at various stress states. Coefficients of stress concentration in plates with circular holes are determined in the case of uniaxial tension, uniform biaxial tension, and pure shear. It is demonstrated that stress concentration coefficients calculated regarding microstructural factors of stress concentration can take values that considerably differ from values for isotropic body, depending on anisotropy of elastic properties of polycrystalline metals and a type of stress state

Keywords: linear and plane stress states, polycrystalline structure, microstructural factors, nonuniformity of stress