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An Experimental Technique for the Dynamic Characterization of Soft Complex Materials

Thevamaran, R. ; Daraio, C.

In: Experimental Mechanics, 2014, vol. 54, no. 8, p. 1319-1328

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    Titre
    • An Experimental Technique for the Dynamic Characterization of Soft Complex Materials
    Auteur
    • Thevamaran, R.. Engineering and Applied Science, California Institute of Technology, 91125, Pasadena, CA, USA
    • Daraio, C.. Engineering and Applied Science, California Institute of Technology, 91125, Pasadena, CA, USA
    Type de document
    • Postprint
    Langue
    • Inglese
    Publié dans
    • Experimental Mechanics, 2014, vol. 54, no. 8, p. 1319-1328. Springer US; http://www.springer-ny.com
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:326598
    Summary
    We describe an experimental technique to study the dynamic behavior of complex soft materials, based on high-speed microscopic imaging and direct measurements of dynamic forces and deformations. The setup includes high sensitivity dynamic displacement measurements based on geometric moiré interferometry and high-speed imaging for in-situ, full-field visualization of the complex micro-scale dynamic deformations. The method allows extracting dynamic stress-strain profiles both from the moiré interferometry and from the high-speed microscopic imaging. We discuss the advantages of using these two complementing components concurrently. We use this technique to study the dynamic response of vertically aligned carbon nanotube foams subjected to impact loadings at variable deformation rates. The same technique can be used to study other micro-structured materials and complex hierarchical structures.