Mechanical deformation and failure of electrospun polyacrylonitrile nanofibers as a function of strain rate Academic Article uri icon

abstract

  • The mechanical deformation of 12m long electrospun polyacrylonitrile (PAN) nanofibers with diameters of 300600nm was investigated. The nanofibers were subjected to cold drawing in atmospheric conditions and at strain rates between 102 and 104s1. The ultimate strain of the PAN nanofibers was 60%130% varying monotonically with the strain rate. On the contrary, the fiber tensile strength, ranging between 30 and 130MPa, varied nonmonotonically with the slowest drawing rate resulting in the largest ductilities and fiber strengths. At the two faster rates, the large fiber ductilities originated in the formation of a cascade of ripples (necks), while at the slowest strain rate, the nanofibers deformed homogeneously allowing for the largest engineering strengths and extension ratios.

published proceedings

  • APPLIED PHYSICS LETTERS

altmetric score

  • 3

author list (cited authors)

  • Naraghi, M., Chasiotis, I., Kahn, H., Wen, Y., & Dzenis, Y.

citation count

  • 74

complete list of authors

  • Naraghi, Mohammad||Chasiotis, Ioannis||Kahn, Harold||Wen, Yongkui||Dzenis, Yuris

publication date

  • October 2007