Open AccessInfluence of the Porous Structure of a Cement Substrate on the Stress State of Coatings
Author(s) -
В. И. Логанина
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1079/6/062012
Subject(s) - coating , materials science , composite material , cracking , porosity , substrate (aquarium) , stress (linguistics) , elongation , cement , wetting , ultimate tensile strength , geology , linguistics , oceanography , philosophy
The article presents the results of a study of the effect of pores, unfilled with a paint composition, on cracking of paint coatings. A model for calculating stresses is presented. The effect of the discrete nature of the contact of the coating with the substrate on the distribution of internal stresses in the coating is established. The effect of the pore size on the substrate and the coating thickness on the values of internal stresses is shown. It was found that in the absence of cracking in the coating, the dependence of the stress on the pore diameter in the contact zone is practically not manifested. It is shown that at a coating thickness of more than 0.09 cm, the relative deformations of the coating exceed the value of the ultimate elongation, cracking is predicted. The stress values in the coating above the pore not filled with the paint composition are constant. For the area of dense abutment of the coating, the dependence of the stress value on the pore diameter is observed.