MULTISCALE EVALUATION OF THE NONLINEAR ELASTIC PROPERTIES OF CARBON NANOTUBES UNDER FINITE DEFORMATION

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SHAHABODINI ABOLFAZL; ANSARI REZA; DARVIZEH MANSOUR

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Journal: JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS Year:2017 | Volume:50 | Issue:1 Page(s): 60-80

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Title

MULTISCALE EVALUATION OF THE NONLINEAR ELASTIC PROPERTIES OF CARBON NANOTUBES UNDER FINITE DEFORMATION

Author(s)

SHAHABODINI ABOLFAZL | ANSARI REZA | DARVIZEH MANSOUR | Issue Writer Certificate

Keywords

ELASTIC PROPERTIES

CARBON NANOTUBE

MULTISCALE MODELING

HIGHER-ORDER CAUCHY-BORN RULE

FINITE DEFORMATION

Abstract

This paper deals with the calculation of the ELASTIC PROPERTIES for single-walled CARBON NANOTUBEs (SWCNTs) under axial deformation and hydrostatic pressure using the atomistic-based continuum approach and the deformation mapping technique. A hyperelastic model based on the higher-order Cauchy-Born (HCB) rule being applicable at finite strains and accounting for the chirality and material nonlinearity is presented. Mechanical properties of several CARBON NANOTUBEs (CNTs) are computed and compared with the existing theoretical results and a good agreement is observed. Moreover, by comparison with atomistic calculations, it is found that the present model can reproduce the energetics of axially deformed CNTs. The model is then adopted to study the dependence of the ELASTIC PROPERTIES on chirality, radius and strain which yields an upper bound on the stability limit of axially and circumferentially stretched nanotubes. The influence of chirality is found to be more prominent for smaller tubes and as the diameter increases, the anisotropy induced by FINITE DEFORMATIONs gets nullified. It is discerned that the constitutive properties of the CNT can vary with deformation in a nonlinear manner. It is also found that the CNT displays a martial softening behavior at finite tensile strains and a hardening behavior at slightly compressive strains.

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APA: Copy

SHAHABODINI, ABOLFAZL, ANSARI, REZA, & DARVIZEH, MANSOUR. (2017). MULTISCALE EVALUATION OF THE NONLINEAR ELASTIC PROPERTIES OF CARBON NANOTUBES UNDER FINITE DEFORMATION. JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS, 50(1), 60-80. SID. https://sid.ir/paper/347370/en

Vancouver: Copy

SHAHABODINI ABOLFAZL, ANSARI REZA, DARVIZEH MANSOUR. MULTISCALE EVALUATION OF THE NONLINEAR ELASTIC PROPERTIES OF CARBON NANOTUBES UNDER FINITE DEFORMATION. JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS[Internet]. 2017;50(1):60-80. Available from: https://sid.ir/paper/347370/en

IEEE: Copy

ABOLFAZL SHAHABODINI, REZA ANSARI, and MANSOUR DARVIZEH, “MULTISCALE EVALUATION OF THE NONLINEAR ELASTIC PROPERTIES OF CARBON NANOTUBES UNDER FINITE DEFORMATION,” JOURNAL OF ULTRAFINE GRAINED AND NANOSTRUCTURED MATERIALS, vol. 50, no. 1, pp. 60–80, 2017, [Online]. Available: https://sid.ir/paper/347370/en

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