Calculations of Buckle-Driven Delamination Using Cohesive Elements
- 195 Downloads
Plane strain, elastic calculations of buckle-driven thin film delamination from compliant substrates using finite element models are considered. The interfacial properties between the film and the substrate are modeled using cohesive elements with a tractionseparation law formulated in terms of a potential. The model yielded the geometry of the buckles given the properties of the film and the substrate, the interfacial toughness and the value of the compressive equi-biaxial stress. Results for the relation between the buckle width and the interfacial toughness were very close to similar results by Yu and Hutchinson (2002), thus giving confidence that the cohesive element approach presented can be used in applications where buckle-driven delamination of thin films is an issue.
KeywordsThin films delamination compliant substrate cohesive elements
Unable to display preview. Download preview PDF.
- Gioia, G., Ortiz, M., (1997). Delamination of compressed thin films. Advances in Applied Mechanics, 33, Academic Press, 119- 192.Google Scholar
- Hutchinson, J.W., Suo, Z., (1992). Mixed mode cracking in layered materials. Advances in Applied Mechanics, 29, Academic Press, 63-191.Google Scholar
- Kachanov, L.M., (1976). Separation failure of composite materials. Mekhanika Polimerov, 5, 918-922. Translation in Mechanics of Composite Materials, 12, 812-815.Google Scholar
- Mei, H., Huang, R., Chung, J.Y., Stafford, C.M., Yu, H.-H., (2007). Buckling modes of elastic thin films on elastic substrates. Applied Physics Letters, 90, 151902-1-3.Google Scholar
- Moody, N.R., Reedy, E.D., Corona, E., Adams, D.P., Zhou, X., Emerson, J.A., Nguyen, T.D., Kennedy, M.S., Cordill, M.J., Hale, L., Yeager, J., Bahr, D.F., (2009). Nanomechanics of Hard Films on Compliant Substrates. Sandia Report SAND2009-6196.Google Scholar