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Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral.

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Presentation on theme: "Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral."— Presentation transcript:

1 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Schematic illustration of a crystal of carbon nanoscrolls with inner core radius r 0, outer radius R and interlayer spacing h under uniaxial compression Figure Legend:

2 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Variation of the contact layer number n with the increasing compressive stress p¯, where n decreases mildly as p¯ increases. The parameters adopted in the calculations are B¯ = 270,γ¯ = 0.136,η = 1 (black), γ¯ = 0.136,η = 0.8 (red), and γ¯ = 0.68,η = 1 (blue). Figure Legend:

3 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Snapshots of MD simulation results showing the evolution of a CNS crystal under uniaxial compression/decompression Figure Legend:

4 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 The core size of CNSs normalized by h as a function of the number of layers. For comparison, the critical sizes normalized by h associated with self-collapse and self-recovery for CNTs are shown as black and red lines, respectively. Other system parameters are taken to be γ¯ = 0.136λ, η = 1 and (a) λ = 1, (b) λ = 0.2. Figure Legend:

5 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Stress-strain profiles of the CNS crystal under uniaxial compression (blue circles)/decompression (green triangles) under different LJ energy tuning parameter (a) λ = 1 and (b) λ = 0.4. The solid lines indicate theoretical results with parameters B¯ = 270,γ¯ = 0.136λ, η = 0.4 (blue), 0.6 (red), 1 (magenta) and η = 12 for λ = 1, η = 10 for λ = 0.4. (c) The normalized pull-off force (see arrows in Figs. 5(a) and 5(b)) for CNSs to recover from the collapsed state under different values of the LJ energy tuning parameter λ. (d) The normalized energy dissipated during a loading-unloading cycle under different values of the LJ energy tuning parameter λ. Figure Legend:

6 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Stress-strain profiles of a CNS crystal under uniaxial lateral compression with different lengths of the basal graphene that rolls into individual CNSs Figure Legend:

7 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Comparison of the stress-strain profiles for (a) CNS compressed under different strain rate and (b) CNTs and CNSs under uniaxial lateral compression Figure Legend:

8 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Snapshots of MD simulation results showing the initial and final states of a CNS crystal under equibiaxial compression/decompression Figure Legend:

9 Date of download: 5/28/2016 Copyright © ASME. All rights reserved. From: Tunable Mechanical Behavior of Carbon Nanoscroll Crystals Under Uniaxial Lateral Compression J. Appl. Mech. 2013;81(2):021014-021014-6. doi:10.1115/1.4024418 Stress-strain profiles of CNSs under biaxial compression/decompression under different values of the LJ energy factor λ. The lines are the theoretical results with η = 0.5, B¯ = 270,γ¯ = 0.136λ. Figure Legend:


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