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Digital Image Correlation: Visualizing Strain Evolution and Coordinated Buckling within CNT Arrays by In Situ Digital Image Correlation (Adv. Funct. Mater. 22/2012)

Authors

  • Matthew R. Maschmann,

    1. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright Patterson Air Force Base, OH 45433, USA
    2. Universal Technology Corporation, Beavercreek OH, 45432, USA
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  • Gregory J. Ehlert,

    1. Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL, 32611-6250, USA
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  • Sei Jin Park,

    1. Mechanosynthesis Group, Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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  • David Mollenhauer,

    1. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright Patterson Air Force Base, OH 45433, USA
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  • Benji Maruyama,

    1. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright Patterson Air Force Base, OH 45433, USA
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  • A. John Hart,

    1. Mechanosynthesis Group, Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
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  • Jeffery W. Baur

    Corresponding author
    1. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright Patterson Air Force Base, OH 45433, USA
    • Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright Patterson Air Force Base, OH 45433, USA.
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Abstract

original image

Digital image correlation is used for the first time to measure the spatially resolved strain evolution of compressed carbon nanotube columns. A consistent local critical strain criterion of 5% is discovered, unifying otherwise disparate column behavior. As reported by Jeffery W. Baur and co-workers on page 4686, this new capability enables the visualization of the inhomogeneous deformation inherent in many nanoscale and microscale materials.

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