Accession Number:

ADA196531

Title:

Plastic Flow in Oriented Glassy Polymers

Descriptive Note:

Technical rept. no. 2, 15 Jan 1987-30 Jun 1988

Corporate Author:

MASSACHUSETTS INST OF TECH CAMBRIDGE

Report Date:

1987-10-01

Pagination or Media Count:

45.0

Abstract:

A manufactured product often possesses residual texture which was either incidentally or deliberately acquired during its processing history. This is particularly true for the case of polymers, where the ability to easily preferentially pre-orient the material in specific directions is exploited in order to obtain a higher strength product. Specific examples include synthetic fibers, and biaxially-oriented films and containers. The response of the pre-orientedtextured product to normal service life loading conditions will differ considerably from that of a product composed of isotropic material. This paper addresses the issue of the effects of texture on the deformation behavior of glassy polymers. Here, the physically-based constitutive model of Boyce, Parks, and Argon 1987 describing the rate, temperature, and pressure dependent inelastic deformation of initially isotropic glassy polymers is extended to include effects of pre-orientation, i.e., initial texture, via the use of appropriate initial conditions on internal state variables. Keywords Plastic flow Glassy polymers Texture Oriented polymers Computer simulation of plastic flow.

Subject Categories:

  • Polymer Chemistry
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE