Details
| Original language | English |
|---|---|
| Pages (from-to) | 82-95 |
| Number of pages | 14 |
| Journal | Computational materials science |
| Volume | 116 |
| Publication status | Published - 9 Oct 2015 |
Abstract
Stiff films bonded to compliant substrates are used in a wide range of technological applications and especially in thermal barrier coatings (TBC). Thin films can be made of Functionally Graded Materials (FGMs) with a heterogeneous composition that usually range from a metallic to a ceramic phase. Aiming at investigating the phenomenon of delamination of thin FGM layers from compressed elastic substrates, a fully 3D nonlinear computational framework combining nonlinear fracture mechanics based on a novel interface element formulation for large displacements and a solid shell finite element to model the thin film is proposed. A comprehensive numerical analysis of delamination in TBCs is carried out, paying a special attention to the interplay between fracture and wrinkling instabilities. Results of the computations are also compared with benchmark 2D semi-analytical results, showing good accuracy of the proposed method that can be applied to general 3D configurations that are difficult to address by semi-analytical approaches.
Keywords
- Functionally Graded Materials, Nonlinear finite element method, Nonlinear fracture mechanics, Thin films, Wrinkling instability
ASJC Scopus subject areas
- Computer Science(all)
- General Computer Science
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Physics and Astronomy(all)
- General Physics and Astronomy
- Mathematics(all)
- Computational Mathematics
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Computational materials science, Vol. 116, 09.10.2015, p. 82-95.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A computational framework for the interplay between delamination and wrinkling in functionally graded thermal barrier coatings
AU - Reinoso, J.
AU - Paggi, M.
AU - Rolfes, R.
N1 - Funding information: MP and JR would like to thank the European Research Council for supporting the ERC Starting Grant “Multi-field and multi-scale Computational Approach to Design and Durability of PhotoVoltaic Modules” – CA2PVM, under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 306622. JR acknowledges the support of the Spanish Ministry of Economy and Competitiveness/FEDER (DPI2012-37187) and the Andalusian Government (Projects of Excellence No. TEP-7093 and P12-TEP-1050).
PY - 2015/10/9
Y1 - 2015/10/9
N2 - Stiff films bonded to compliant substrates are used in a wide range of technological applications and especially in thermal barrier coatings (TBC). Thin films can be made of Functionally Graded Materials (FGMs) with a heterogeneous composition that usually range from a metallic to a ceramic phase. Aiming at investigating the phenomenon of delamination of thin FGM layers from compressed elastic substrates, a fully 3D nonlinear computational framework combining nonlinear fracture mechanics based on a novel interface element formulation for large displacements and a solid shell finite element to model the thin film is proposed. A comprehensive numerical analysis of delamination in TBCs is carried out, paying a special attention to the interplay between fracture and wrinkling instabilities. Results of the computations are also compared with benchmark 2D semi-analytical results, showing good accuracy of the proposed method that can be applied to general 3D configurations that are difficult to address by semi-analytical approaches.
AB - Stiff films bonded to compliant substrates are used in a wide range of technological applications and especially in thermal barrier coatings (TBC). Thin films can be made of Functionally Graded Materials (FGMs) with a heterogeneous composition that usually range from a metallic to a ceramic phase. Aiming at investigating the phenomenon of delamination of thin FGM layers from compressed elastic substrates, a fully 3D nonlinear computational framework combining nonlinear fracture mechanics based on a novel interface element formulation for large displacements and a solid shell finite element to model the thin film is proposed. A comprehensive numerical analysis of delamination in TBCs is carried out, paying a special attention to the interplay between fracture and wrinkling instabilities. Results of the computations are also compared with benchmark 2D semi-analytical results, showing good accuracy of the proposed method that can be applied to general 3D configurations that are difficult to address by semi-analytical approaches.
KW - Functionally Graded Materials
KW - Nonlinear finite element method
KW - Nonlinear fracture mechanics
KW - Thin films
KW - Wrinkling instability
UR - http://www.scopus.com/inward/record.url?scp=84959510183&partnerID=8YFLogxK
U2 - 10.1016/j.commatsci.2015.08.031
DO - 10.1016/j.commatsci.2015.08.031
M3 - Article
AN - SCOPUS:84959510183
VL - 116
SP - 82
EP - 95
JO - Computational materials science
JF - Computational materials science
SN - 0927-0256
ER -