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Imaging in-plane and normal stresses near an interface crack using traction force microscopy
Ye Xu, Wilfried C. Engl, Elizabeth R. Jerison, Kevin J. Wallenstein, Callen Hyland, Larry A. Wilen, Eric R. Dufresne and Katepalli R. Sreenivasan
Proceedings of the National Academy of Sciences of the United States of America
Vol. 107, No. 34 (August 24, 2010), pp. 14964-14967
Published by: National Academy of Sciences
Stable URL: http://www.jstor.org/stable/27862176
Page Count: 4
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Colloidal coatings, such as paint, are all around us. However, we know little about the mechanics of the film-forming process because the composition and properties of drying coatings vary dramatically in space and time. To surmount this challenge, we extend traction force microscopy to quantify the spatial distribution of all three components of the stress at the interface of two materials. We apply this approach to image stress near the tip of a propagating interface crack in a drying colloidal coating and extract the stress intensity factor.
Proceedings of the National Academy of Sciences of the United States of America © 2010 National Academy of Sciences