Research output: Contribution to journal › Article › peer-review
A multilayer film coating with slightly curved boundary. / Grekov, M.A.; Kostyrko, S.A.
In: International Journal of Engineering Science, Vol. 89, 2015, p. 61-74.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - A multilayer film coating with slightly curved boundary
AU - Grekov, M.A.
AU - Kostyrko, S.A.
PY - 2015
Y1 - 2015
N2 - Surface irregularity is often a source of stress concentrations. They can be reduced by proper matching of dissimilar surface layers. In this connection, a 2-D model of an isotropic multilayer film-substrate composite with rough surface is considered, in order to examine an influence of physical and geometrical properties of the components on the stress state of a boundary. Using the complex variable representations and boundary perturbation technique, the problem is reduced to the set of Fredholm integral equations of the second kind for an arbitrary shape of the boundary. The solution is given in terms of Fourier series for the periodic shape. In the case of a bilayer film coating, numerical results obtained with the use of the first-order approximation demonstrate effects of the boundary shape, thickness and elastic properties of the layers and the substrate on the stress state of a rough surface.
AB - Surface irregularity is often a source of stress concentrations. They can be reduced by proper matching of dissimilar surface layers. In this connection, a 2-D model of an isotropic multilayer film-substrate composite with rough surface is considered, in order to examine an influence of physical and geometrical properties of the components on the stress state of a boundary. Using the complex variable representations and boundary perturbation technique, the problem is reduced to the set of Fredholm integral equations of the second kind for an arbitrary shape of the boundary. The solution is given in terms of Fourier series for the periodic shape. In the case of a bilayer film coating, numerical results obtained with the use of the first-order approximation demonstrate effects of the boundary shape, thickness and elastic properties of the layers and the substrate on the stress state of a rough surface.
KW - Multilayer film coating
KW - Rough surface
KW - Stress concentration
U2 - 10.1016/j.ijengsci.2014.12.001
DO - 10.1016/j.ijengsci.2014.12.001
M3 - Article
VL - 89
SP - 61
EP - 74
JO - International Journal of Engineering Science
JF - International Journal of Engineering Science
SN - 0020-7225
ER -
ID: 3927102