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A mounted SWNT bundle, in which the upper end is attached to the lead rod and the lower end is fixed on the surface of a rigid stage, is subjected to tensile loading (a) before breaking and (b) moments after it was broken into two parts.
Applied force vs elongation curve obtained from uniaxial tensile test on a SWCNT bundle (sample E shown in Table I). Inset is the linear fit of force to strain while strain is below 2%, which gives the slope.
Energy curves of a seven-SWCNT hexagonal arrays (inset) with varying center-to-center distance between the center SWCNT and the rest in the bundle. The bundle state refers to the situation where all of the seven SWCNTs are arranged in the array while the pull-out state refers to a situation when the center tube is pulled out from the array.
Results of eight SWCNT bundles (A–H) measured by uniaxial tensile test. Listed are the effective cross-sectional area , elastic energy , total energy , and , the friction energy.
Results of molecular mechanics simulations.
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