Next Article in Journal
Surface Segregation of Amphiphilic PDMS-Based Films Containing Terpolymers with Siloxane, Fluorinated and Ethoxylated Side Chains
Previous Article in Journal
Synthesis of Solution-Stable PEDOT-Coated Sulfonated Polystyrene Copolymer PEDOT:P(SS-co-St) Particles for All-Organic NIR-Shielding Films
Previous Article in Special Issue
Stress-Affected Lithiation Reactions in Elasto-Viscoplastic Si Particles with Hyperelastic Polymer Coatings: A Nonlinear Chemo-Mechanical Finite-Element Study
Article Menu

Export Article

Open AccessArticle
Coatings 2019, 9(3), 152; https://doi.org/10.3390/coatings9030152

Fracture Mechanics Solutions for Interfacial Cracks between Compressible Thin Layers and Substrates

1
Department of Civil, Chemical and Environmental Engineering, University of Genoa, 16145 Genova, Italy
2
Institute for Problems in Mechanics, Russian Academy of Sciences, 119526 Moscow, Russia
3
Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
*
Author to whom correspondence should be addressed.
Received: 30 January 2019 / Revised: 17 February 2019 / Accepted: 21 February 2019 / Published: 26 February 2019
(This article belongs to the Special Issue Modelling and Simulation of Coating 2019)
Full-Text   |   PDF [2991 KB, uploaded 8 March 2019]   |  

Abstract

The decohesion of coatings, thin films, or layers used to protect or strengthen technological and structural components causes the loss of their functions. In this paper, analytical, computational, and semi-analytical 2D solutions are derived for the energy release rate and mode-mixity phase angle of an edge-delamination crack between a thin layer and an infinitely deep substrate. The thin layer is subjected to general edge loading: axial and shear forces and bending moment. The solutions are presented in terms of elementary crack tip loads and apply to a wide range of material combinations, with a large mismatch of the elastic constants (isotropic materials with Dundurs’ parameters 1 α 1 and 0.4 β 0.4 ). Results show that for stiff layers over soft substrates ( α 1 ), the effects of material compressibility are weak, and the assumption of substrate incompressibility is accurate; for other combinations, including soft layers over stiff substrates ( α 1 ), the effects may be relevant and problem specific. The solutions are applicable to edge- and buckling-delamination of thin layers bonded to thick substrates, to mixed-mode fracture characterization test methods, and as benchmark cases. View Full-Text
Keywords: mixed-mode fracture; phase angle; delamination; interfaces; coatings; sandwich; linear elastic fracture mechanics; soft materials substrates mixed-mode fracture; phase angle; delamination; interfaces; coatings; sandwich; linear elastic fracture mechanics; soft materials substrates
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Massabò, R.; Ustinov, K.; Barbieri, L.; Berggreen, C. Fracture Mechanics Solutions for Interfacial Cracks between Compressible Thin Layers and Substrates. Coatings 2019, 9, 152.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Coatings EISSN 2079-6412 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top