Abstract
Motivated by recent developments in laser-induced spallation testing of thin film structures, we develop a spectral scheme for the simulation of dynamic failure of thin films. In this first study, we focus on the anti-plane shear (mode 3) loading case. The scheme relies on an exact spectral representation of the elastodynamic solutions in the substrate and in the film, and their combination through interface conditions that involve general cohesive failure and/or frictional contact models. A detailed modal analysis of the response of a single spectral mode is performed to assess the stability and precision of the resulting numerical scheme. A set of dynamic fracture problems involving non-propagating and propagating cracks are simulated to show the ability of the numerical scheme to capture the effect of wave reflection on the near-tip stress and displacement fields, and on the dynamic motion of a crack along the film/substrate interface.
Original language | English (US) |
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Pages (from-to) | 1866-1891 |
Number of pages | 26 |
Journal | Engineering Fracture Mechanics |
Volume | 72 |
Issue number | 12 SPEC. ISS. |
DOIs | |
State | Published - Aug 2005 |
Keywords
- Delamination
- Dynamic fracture
- Spallation
- Spectral scheme
- Thin film
ASJC Scopus subject areas
- Mechanical Engineering
- Mechanics of Materials