Low-cycle fatigue of V-notched cylindrical samples of bronze alloy

The article presents the results of experiments on cyclic loading samples with an annular V-shaped notch and their mathematical modeling. tests were carried out specimens BrKh08-Sh alloy a change in tensile load from 0 to given value. Under such loading, material groove area is subjected elastoplastic deformation, which leads failure due low-cycle fatigue. When testing using digital image correlation method, deformation surface undercut was measured, made it possible determine nature its range cycle cycle. Mathematical modeling according finite element method. For this purpose, models elastic-plastic accumulation damages are introduced into SIMULIA Abaqus software package. plasticity model based theory flow under combined hardening. damage energy strength criterion. basic equations used calculate models. parameters determined verified experiment tension-compression smooth cylindrical sample asymmetric rigid loading. Based calculation, cartograms stresses, deformations, accumulated constructed. It shown that when unloaded, stress concentration close groove, compressive stresses arise, values at moment application maximum load. compared experiment. A comparison terms axial number cycles before failure.