Elastic Instability of Multilayer Films Coated on Substrates

Published

January 1, 2005

Author(s)

Shu Guo, Martin Y. Chiang, Christopher M. Stafford

Abstract

Mechanical properties of ultra-thin (submicrometer) films coated on a substrate are paramount in many applications. One question arises as to whether the physical and mechanical properties of supported thin films in applications can be significantly different from the properties of chemically identical bulk materials. There have been many methods developed to measure these properties of thin films for the purpose of understanding the relation between the microstructure and behavior of material in the bulk and material in thin films coated on a substrate.The basic concept among them is that these properties can be deduced from the response of a film/substrate system perturbed either mechanically, thermally, acoustically, or optically. In some specialty or common applications, multilayer material system has been developed to meet the increasingly demanding cost and performance requirements. Therefore, we present here a theoretical analysis for the structural stability of a multilayer system on an elastic medium. Ultimately, rather than a single layer system reported in the literature, this stability analysis could facilitate the development of a measurement technique for deducing the mechanical properties of each constituent layer in a multilayer system. Also, the finite element analysis (FEA) has been performed on the multilayer system to clarify the assumptions used and validate the results in the theoretical analysis.

Proceedings Title

Proceedings| 28th Annual Meeting

Volume

16

Conference Dates

February 13-16, 2005

Conference Title

Adhesion Society

Pub Type

Conferences

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Keywords

buckling, classic laminate theory, mechanical properties, multilayer, thin film

Citation

Guo, S. , Chiang, M. and Stafford, C. (2005), Elastic Instability of Multilayer Films Coated on Substrates, Proceedings| 28th Annual Meeting, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=852474 (Accessed October 31, 2024)