Open AccessA mesoscopic analysis of a localized shear band propagation effect on the deformation and fracture of coated materials
Author(s) -
Р. Р. Балохонов,
В. А. Романова,
Aleksandr Zemlianov
Publication year - 2021
Publication title -
reports in mechanical engineering
Language(s) - English
Resource type - Journals
ISSN - 2683-5894
DOI - 10.31181/rme200102006b
Subject(s) - materials science , composite material , shear band , fracture mechanics , shear (geology) , isotropy , deformation (meteorology) , mesoscopic physics , optics , condensed matter physics , physics
The numerical simulations of the deformation and fracture in an iron boride coating – steel substrate composition are presented. The dynamic boundary-value problem is solved numerically by the finite-difference method. A complex geometry of the borided coating – steel substrate interface is taken into account explicitly. To simulate the mechanical behavior of the steel substrate, use is made of an isotropic strain hardening model including a relation for shear band propagation. Local regions of bulk tension are shown to arise near the interface even under simple uniaxial compression of the composition and in so doing they determine the mesoscale mechanisms of fracture. The interrelation between plastic deformation in the steel substrate and cracking of the borided coating is studied. Stages of shear band front propagation attributable to the interface complex geometry have been revealed. The coating cracking pattern, location of the fracture onset regions and the total crack length are found to depend on the front velocity in the steel substrate.