The uniaxial tension test can be used to study the interface properties of thin metal films on compliant substrates. These properties are identified by the comparison of experimentally observed delamination buckling and results achieved by a computational model which contains the interface properties as parameters. The mathematical model is built in a multi-scale approach by a macromodel comprising the whole tension test sample, and a 3/D micromodel of a small detail where delamination buckling of the film is studied. It is shown that, for the considered uniaxial tension test, the buckling and associated delamination process are initiated and driven by interfacial shear in addition to compressive stresses in the film. The proposed model is able to reproduce all important experimentally observed phenomena like cracking stress of the film, film strip curvature and formation of triangular buckles. Combined with experimental data, the developed computational model is found to be effective in determining interface strength properties.
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