@inproceedings{9bb8256188d84e5c83ae6972c65cb2a3,
title = "Rate-dependent, large-displacement deformation of vertically aligned carbon nanotube arrays",
abstract = "Rate dependent mechanical response of the vertically aligned carbon nanotube arrays (VA-CNTs) has been examined with large-displacement indentation tests. The VA-CNTs are observed to exhibit elastic deformation at small displacement and then plastic deformation at large displacement. Under the cylindrical, flat-ended punch, the nanotube arrays collapse plastically at positions of immediately beneath the indenter face. The plastic zone remains stable at large displacement, because the stress/strain field under a flat cylindrical punch is relatively constant. From the normalized indentation stress-displacement curve, the critical indentation pressure (Pm), a measure of collapsing stress of the CNT arrays, is obtained. The speeds of the indenter have been varied, from 0.5 to 4 μm/s. The large displacement deformation is influenced by the effective strain rate of the material. The critical indentation pressure increases with the increase with the strain rates.",
keywords = "Carbon nanotube, Indentation, Large displacement, Strain rate",
author = "Lu, {Y. C.} and J. Joseph and Maschmann, {M. R.} and L. Dai and J. Baur",
year = "2013",
doi = "10.1007/978-1-4614-4241-7_15",
language = "English (US)",
isbn = "9781461442400",
series = "Conference Proceedings of the Society for Experimental Mechanics Series",
pages = "101--107",
booktitle = "Challenges in Mechanics of Time-Dependent Materials and Processes in Conventional and Multifunctional Materials - Proceedings of the 2012 Annual Conference on Experimental and Applied Mechanics",
note = "2012 Annual Conference on Experimental and Applied Mechanics ; Conference date: 11-06-2012 Through 14-06-2012",
}