# Décollement par fatigue d'un film mince en flexion: une approche variationnelle

Abstract : We study the debonding of a thin film initially bonded at a rigid support and submitted to a cyclic deflexion. By using a principle of least energy, a Dugdale surface energy and an irreversible condition, we build a debonding growth model under cyclic loading in order to model the phenomenon of fatigue. In particular the number of cycles until the total debonding depends on the ratio $\varepsilon$ between the internal length introduced in the Dugdale energy and the length of the film. When $\varepsilon$ tends to 0, we show that the limit fatigue law is like a Paris law; the debonding growth rate is a function of the potential energy release rate: $\dot{\ell}=f(G)$.
Keywords :
Document type :
Conference papers
Domain :

Cited literature [4 references]

https://hal.archives-ouvertes.fr/hal-01813057
Contributor : Mathias Legrand <>
Submitted on : Tuesday, June 12, 2018 - 5:37:01 AM
Last modification on : Tuesday, May 14, 2019 - 10:13:50 AM
Long-term archiving on : Thursday, September 13, 2018 - 2:37:17 PM

### File

Marigo_2005.pdf
Files produced by the author(s)

Public Domain

### Identifiers

• HAL Id : hal-01813057, version 1

### Citation

André Jaubert, Jean-Jacques Marigo. Décollement par fatigue d'un film mince en flexion: une approche variationnelle. 7e colloque national en calcul des structures, CSMA, May 2005, Giens, France. ⟨hal-01813057⟩

Record views