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.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)