A variable constraint tube model for size effects of polymer nano-structures

Shan Tang*, M. Steven Greene, Wing Kam Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


We develop a molecular-based hyperelastic model to simulate the size dependent mechanical properties of polymer nano-structures. We assume that polymer chains are confined to a different tube size in a boundary layer than that in the core, which alters the free energy and produces the size effect. Simulations also explore anisotropic orientations of polymer chains and surface tension. The axial modulus of nanofibers is studied in detail, although the model is applicable to other systems like thin films and nano-biological systems.

Original languageEnglish (US)
Article number191910
JournalApplied Physics Letters
Issue number19
StatePublished - Nov 7 2011

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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