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Influences of interface properties and coating thickness on fracture behaviors of coating/substrate systems

Influences of interface properties and coating thickness on fracture behaviors of... Interface delamination plays an important role on the failure of multi-layer parts, influences of interface properties and coating thickness on interface fracture of coating/substrate systems attract great attention. In this paper, interface fracture behaviors of ceramic coating/substrate systems under three-point bending were modelled based on finite element simulations with interface cohesive elements. Influences of coating thickness, interfacial strength and interfacial fracture toughness on interface crack evolution were studied. The simulations indicate that interface crack initiates earlier for the thicker coating systems or the systems with the smaller interface fracture toughness, and the influence of interface strength is more complicated. The simulation results are in agreement with the experimental results and instructive to understand interface failure behaviors of coating/substrate systems deeply. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Strength, Fracture and Complexity iospress

Influences of interface properties and coating thickness on fracture behaviors of coating/substrate systems

Strength, Fracture and Complexity , Volume 12 (2-4): 5 – Mar 26, 2020

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Publisher
IOS Press
Copyright
Copyright © 2020 IOS Press and the authors. All rights reserved
ISSN
1567-2069
eISSN
1875-9262
DOI
10.3233/SFC-190239
Publisher site
See Article on Publisher Site

Abstract

Interface delamination plays an important role on the failure of multi-layer parts, influences of interface properties and coating thickness on interface fracture of coating/substrate systems attract great attention. In this paper, interface fracture behaviors of ceramic coating/substrate systems under three-point bending were modelled based on finite element simulations with interface cohesive elements. Influences of coating thickness, interfacial strength and interfacial fracture toughness on interface crack evolution were studied. The simulations indicate that interface crack initiates earlier for the thicker coating systems or the systems with the smaller interface fracture toughness, and the influence of interface strength is more complicated. The simulation results are in agreement with the experimental results and instructive to understand interface failure behaviors of coating/substrate systems deeply.

Journal

Strength, Fracture and Complexityiospress

Published: Mar 26, 2020

References