Delamination growth of a sandwich layer by diffusion of a corrosive species

Alessandro Leronni; Norman A. Fleck

doi:10.1016/j.jmps.2022.105179

Delamination growth of a sandwich layer by diffusion of a corrosive species

Alessandro Leronni
, Norman A. Fleck

University of Cambridge

Research output: Contribution to journal › Article › peer-review

4 Citations (SciVal)

Abstract

The progressive delamination of a sandwich layer is analysed by assuming that delamination is driven by Fickian diffusion of a corrosive species. One side face of the layer is exposed to a constant concentration of corrodent and the corrodent diffuses along both the sandwich layer and the delamination. The corrodent is consumed ahead of the delamination tip by a first-order chemical reaction on the interface; when a critical amount of corrodent has reacted, the delamination front advances, thereby setting the delamination growth criterion. Numerical solutions are obtained for growth of the delamination as a function of time over the full range of geometric and material parameters. Analytic solutions are obtained for asymptotic regimes of behaviour, with an emphasis on the case of slow growth subsequent to an initiation period.

Original language	English
Article number	105179
Number of pages	17
Journal	Journal of the Mechanics and Physics of Solids
Volume	172
Early online date	16 Dec 2022
DOIs	https://doi.org/10.1016/j.jmps.2022.105179
Publication status	Published - 1 Mar 2023

Data Availability Statement

No data was used for the research described in the article.

Acknowledgements

The authors are grateful to Prof. Vikram Deshpande and to Dr. Sina Askarinejad for insightful discussions.

Funding

The authors are grateful for financial support from the European Research Council in the form of an Advanced Grant (MULTILAT, 669764).

Keywords

Adhesion and adhesives
Corrosion and embrittlement
Delamination
Diffusion
Fracture

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10.1016/j.jmps.2022.105179Licence: CC BY

Cite this

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title = "Delamination growth of a sandwich layer by diffusion of a corrosive species",

abstract = "The progressive delamination of a sandwich layer is analysed by assuming that delamination is driven by Fickian diffusion of a corrosive species. One side face of the layer is exposed to a constant concentration of corrodent and the corrodent diffuses along both the sandwich layer and the delamination. The corrodent is consumed ahead of the delamination tip by a first-order chemical reaction on the interface; when a critical amount of corrodent has reacted, the delamination front advances, thereby setting the delamination growth criterion. Numerical solutions are obtained for growth of the delamination as a function of time over the full range of geometric and material parameters. Analytic solutions are obtained for asymptotic regimes of behaviour, with an emphasis on the case of slow growth subsequent to an initiation period.",

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T1 - Delamination growth of a sandwich layer by diffusion of a corrosive species

AU - Leronni, Alessandro

AU - Fleck, Norman A.

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N2 - The progressive delamination of a sandwich layer is analysed by assuming that delamination is driven by Fickian diffusion of a corrosive species. One side face of the layer is exposed to a constant concentration of corrodent and the corrodent diffuses along both the sandwich layer and the delamination. The corrodent is consumed ahead of the delamination tip by a first-order chemical reaction on the interface; when a critical amount of corrodent has reacted, the delamination front advances, thereby setting the delamination growth criterion. Numerical solutions are obtained for growth of the delamination as a function of time over the full range of geometric and material parameters. Analytic solutions are obtained for asymptotic regimes of behaviour, with an emphasis on the case of slow growth subsequent to an initiation period.

AB - The progressive delamination of a sandwich layer is analysed by assuming that delamination is driven by Fickian diffusion of a corrosive species. One side face of the layer is exposed to a constant concentration of corrodent and the corrodent diffuses along both the sandwich layer and the delamination. The corrodent is consumed ahead of the delamination tip by a first-order chemical reaction on the interface; when a critical amount of corrodent has reacted, the delamination front advances, thereby setting the delamination growth criterion. Numerical solutions are obtained for growth of the delamination as a function of time over the full range of geometric and material parameters. Analytic solutions are obtained for asymptotic regimes of behaviour, with an emphasis on the case of slow growth subsequent to an initiation period.

KW - Adhesion and adhesives

KW - Corrosion and embrittlement

KW - Delamination

KW - Diffusion

KW - Fracture

U2 - 10.1016/j.jmps.2022.105179

DO - 10.1016/j.jmps.2022.105179

M3 - Article

SN - 0022-5096

VL - 172

JO - Journal of the Mechanics and Physics of Solids

JF - Journal of the Mechanics and Physics of Solids

M1 - 105179

ER -

Delamination growth of a sandwich layer by diffusion of a corrosive species

Abstract

Data Availability Statement

Acknowledgements

Funding

Keywords

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