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@ARTICLE{Nordhorn:153809,
author = {Nordhorn, Christian and Mücke, Robert and Vaßen, Robert},
title = {{S}imulation of the effect of realistic surface textures on
thermally induced topcoat stress fields by two-dimensional
interface functions},
journal = {Surface and coatings technology},
volume = {258},
issn = {1944-737X},
address = {Amsterdam [u.a.]},
publisher = {American Concrete Institute (aci international)},
reportid = {FZJ-2014-03289},
pages = {181-188},
year = {2014},
abstract = {The simulation of thermally induced three-dimensional
stress fields in multilayer systems with rough
interfacesaccording to the distribution of stress levels by
two-dimensional modeling approaches is investigated here
byperforming a case study on atmospherically plasma-sprayed
thermal barrier coating systems. In order to analyzethe
microstructure effect, the pronounced interface roughness of
these systems is simulated with different
approximationfunctions, whose parameters are derived on the
basis of measured surface roughness parameters.Finite
element analyses of realistic three-dimensional and multiple
two-dimensional models were performedensuring that
consistent boundary conditions were established in both
cases. These analyses yielded stress distributionsas a
function of the thickness of a thermally grown oxide layer.
In comparison to the reference histogramfor the stress
distribution in the three-dimensional model, the analyses of
the two-dimensionalapproximation models result in histograms
which correctly reflect essential oxide-growth-related
featuressuch as stress field inversion and reduction of
maximum stress levels. However, these simplifying
twodimensionalmodels do not reflect all the details of the
stress distributions. The three-dimensional reference
isfound to be too complex with respect to the geometric
interface features to be replaced by a single
twodimensionalapproximating function.},
cin = {IEK-1},
ddc = {620},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {122 - Power Plants (POF2-122)},
pid = {G:(DE-HGF)POF2-122},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000346895000022},
doi = {10.1016/j.surfcoat.2014.09.032},
url = {https://juser.fz-juelich.de/record/153809},
}