MEMS-based in-situ tensile experiments designed to arrest catastrophic failure in brittle nanomaterials

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Quantitative characterization of mechanical properties of many nano- or micro-scaled materials is of crucial importance for many technological applications. Among various experimental methods, the in-situ nanomechanical tensile testing is of particular significance due to its capability of direct observation of mechanical behavior. Especially, the tensile loading mode enabling the precise displacement control is desirable for brittle nanomaterials that often suffer from the catastrophic failure by mechanical instability. In this study, we developed the MEMS-based nanomechanical tensile device optimized for stable displacement control even in the presence of the rapid reduction of sample stiffness. The MEMS device is designed to stabilize the motion of the actuating rod in the testing equipment via the high stiffness of springs and the large mass of the movable part. To verify the performance of the device, we conducted tensile testing on the pre-notched metallic glass samples and successfully observed fast load drops during crack propagation.
Publisher
ELSEVIER
Issue Date
2020-11
Language
English
Article Type
Article
Citation

EXTREME MECHANICS LETTERS, v.41, pp.101071

ISSN
2352-4316
DOI
10.1016/j.eml.2020.101071
URI
http://hdl.handle.net/10203/278430
Appears in Collection
PH-Journal Papers(저널논문)NE-Journal Papers(저널논문)
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