A methodology to model the complex morphology of rough interfaces

Vincent Maurel (1) , Esteban P. Busso (2) , Julien Frachon (1) , Jacques Besson (1) , Franck N'Guyen (1)

1 MAT - Centre des Matériaux
2 ONERA - The French Aerospace Lab [Palaiseau]

A methodology is proposed to model the complex morphology of rough interfaces using Fourier techniques and image analysis. It allows an optimal representation of a rough interface so as to enable a realistic calculation of the local stress and strain fields in the interface vicinity using finite element techniques. The methodology is illustrated through a sensitivity analysis carried out on a thermal barrier coating system. Typical bi-material interfaces with different levels of morphological complexity are described in 2D and 3D using both periodic (sinusoidal) and Fourier functions. The results are discussed in terms of their relative accuracy.

Mots clés: Interface morphology; Image correlation; Thermal barrier coatings; Finite element modelling

Domaines: Physique [physics]; Matière Condensée [cond-mat]; Science des matériaux [cond-mat.mtrl-sci]

Vincent Maurel, Esteban P. Busso, Julien Frachon, Jacques Besson, Franck N'Guyen. A methodology to model the complex morphology of rough interfaces. International Journal of Solids and Structures, 2014, 51 (19-20), pp.3293-3302. ⟨10.1016/j.ijsolstr.2014.04.015⟩. ⟨hal-01083592⟩