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Strain-controlled bulge test
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Date
2008-12-01
Author
Alaca, B. Erdem
Toga, K. Bugra
Akar, Orhan
Akın, Tayfun
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A closed-loop approach is adopted to implement strain rate Control during the bulge test. Due to the difficulty Of measuring strains directly, the technique is based oil the conversion of displacement measurement to the corresponding strains using the plane-strain formulation. The necessary temporal evolution of the midpoint displacement of a rectangular diaphragm is derived under the condition of constant Strain rate and is Imposed as a control criterion. The technique is demonstrated oil 500-nm-thick Au diaphragms by applying, strain rates ranging from 2 x 10(-6) to 2 x 10(-4) s(-1). By measures the corresponding yield strength values, a Strain rate sensitivity of 0.11 is obtained, which is close to what was previously reported oil similar specimens using the microbending test.
Subject Keywords
Mechanical Engineering
,
General Materials Science
,
Mechanics of Materials
,
Condensed Matter Physics
URI
https://hdl.handle.net/11511/42011
Journal
JOURNAL OF MATERIALS RESEARCH
DOI
https://doi.org/10.1557/jmr.2008.0395
Collections
Department of Electrical and Electronics Engineering, Article