University of Illinois Urbana-Champaign

Numerical simulation of semicrystalline nylon 6: elastic constants of crystalline and amorphous parts

Hsia, K.J.; Xin, Y.B.; Lin, L.

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https://hdl.handle.net/2142/112393

Description

Title
Numerical simulation of semicrystalline nylon 6: elastic constants of crystalline and amorphous parts
Author(s)
  • Hsia, K.J.
  • Xin, Y.B.
  • Lin, L.
Issue Date
1993-01
Keyword(s)
  • Semi-crystalline Nylon 6
  • Elastic Constants
  • Crystalline And Amorphous Parts
Abstract
The elastic responses of crystalline and amorphous parts in semi-crystalline nylon 6 are determined by computer simulation using the finite element method. Semi-crystalline nylon 7 is modelled as a composite consisting of alternating layers of lamellar crystals and amorphous regions. Full morphological details identified by Lin and Argon in their highly textured nylon 6 bulk samples are incorporated in the model. An optimization scheme is employed to systematically search for the individual components' elastic constants which give rise to a composite elastic behavior as that measured by Lin and Argon. A two-dimensional plane strain finite element analysis is performed to evaluate the composite elastic behavior for given set of constituents' elastic constants. The resulted elastic constants of semi-crystalline nylon 6 for the optimized values of crystalline and amorphous elastic properties are within 6% average error with the experimental data. The computations also reveal that high stress concentration exists in the crystalline region. Therefore, experimental measurements of plastic resistance may represent a significant underestimate of the intrinsic critical resolved shear strength of polymer crystals.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
  • TAM R 706
  • 1993-6004
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112393
Copyright and License Information
Copyright 1993 Board of Trustees of the University of Illinois

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Technical Reports - Theoretical and Applied Mechanics (TAM) PRIMARY
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.