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发帖数: 5 | 1 Finite Element Analysis of the Indentation-Induced
Delamination of Bi-Layer Structures
Ming Liu and Fuqian Yang∗
Materials Program, Department of Chemical and Materials Engineering,
University of Kentucky, Lexington, KY, 40506, USA
Journal of
Computational and Theoretical Nanoscience
Vol. 9, 851–858, 2012
Contact deformation can cause local damage of mechanical structures and lead
to structural failure
of mechanical devices. In this work, we use the finite element method
to analyze the indentation-
induced delamination of a film-substrate structure and the critical
tensile stress as the criterion to
determine local delamination on the interface between the film and the
substrate. The simulation
results show that both the size of the delamination zone and the maximum
separation increase
with increasing the indentation depth and with decreasing the film
thickness. The delamination also
depends on the interfacial friction for the sliding on the interface. The
largest delamination occurs at
the friction coefficient of 0.5 for the film-substrate structure
used in this work. For friction coefficient
larger than 0.5, the size of the delamination zone decreases with increasing
the friction coefficient.
Keywords: Indentation, Delamination, Film, Interface, Finite Element
Analysis. |
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