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Some Considerations of Determination of Residual Stresses and Young's Moduli in Ceramic Coatings
Author(s) -
Hsueh ChunHway
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb07153.x
Subject(s) - residual stress , materials science , composite material , coating , substrate (aquarium) , ceramic , bending , modulus , bending moment , elastic modulus , stress (linguistics) , young's modulus , structural engineering , linguistics , oceanography , philosophy , engineering , geology
Residual stresses that develop during cooling of a ceramic coating/substrate strip are considered. Bending occurs because of an asymmetric stress distribution in the strip. In the presence of residual stresses, strains induced on the surfaces of the coating and the substrate are analyzed when (1) the coating‐substrate interface exhibits a transition from a bonded to a debonded state, and (2) a bending moment is applied to straighten the strip. The result shows that both the residual stress and Young's modulus in the ceramic coating can be determined from the surface strains due to either interfacial debonding or strip straightening, Young's modulus of the substrate, and the thicknesses of the coating and the substrate.