期刊
EXPERIMENTAL MECHANICS
卷 54, 期 8, 页码 1319-1328出版社
SPRINGER
DOI: 10.1007/s11340-014-9896-9
关键词
Complex materials; Hierarchical materials; Impact testing; Geometric moirc; High-speed microscopic imaging
资金
- Institute for Collaborative Biotechnologies (ICB) [W911NF-09-D-0001]
- Army Research Office (ARO)
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 moir, 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 moir, 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.
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