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Cracking of coated materials under transient thermal stressesThe crack problem for a relatively thin layer bonded to a very thick substrate under thermal shock conditions is considered. The effect of surface cooling rate is studied by assuming the temperature boundary condition to be a ramp function. Among the crack geometries considered are the edge crack in the coating layer, the broken layer, the edge crack going through the interface, the undercoat crack in the substrate and the embedded crack crossing the interface. The primary calculated quantity is the stress intensity factor at various singular points and the main variables are the relative sizes and locations of cracks, the time, and the duration of the cooling ramp. The problem is solved and rather extensive results are given for two material pairs, namely a stainless steel layer welded on a ferritic medium and a ceramic coating on a steel substrate.
Document ID
19900033485
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rizk, A. A.
(Lehigh Univ. Bethlehem, PA, United States)
Erdogan, F.
(Lehigh University Bethlehem, PA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Publication Information
Publication: Journal of Thermal Stresses
Volume: 12
Issue: 2 19
ISSN: 0149-5739
Subject Category
Structural Mechanics
Accession Number
90A20540
Funding Number(s)
CONTRACT_GRANT: NAG1-713
CONTRACT_GRANT: NSF MSM-86-13611
Distribution Limits
Public
Copyright
Other

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