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Download fileStress-strain dependence for soy-protein nanofiber mats
journal contribution
posted on 2012-08-15, 00:00 authored by S. Khansari, S. Sinha-Ray, A. L. Yarin, B. PourdeyhimiSoy protein=nylon 6 monolithic and core-shell nanofibers were solution-blown and collected
on a rotating drum as fiber mats. Tensile tests of rectangular strips of these mats revealed their stress-strain dependences. These dependences were linear at low strains which correspond to their elastic behavior. Then, a plastic-like nonlinearity sets in, which is followed by catastrophic rupture.
Parameters such as Young’s modulus, yield stress, and specific strain energy were measured. The results were rationalized in the framework of the phenomenological elastic-plastic model, as well
as a novel micromechanical model (the latter attributes plasticity to bond rapture between
the individual overstressed fibers in the mat). Besides, the effects of stretching history, rate of stretching, and winding velocity of the collector drum on the strength-related parameters are
studied. The results for soy protein=nylon 6 nanofiber mats are also compared to those for solution blown pure nylon 6 mats, which were produced and tested in the same way.