A nonlinear viscoelastic constitutive equation - Yield predictions in multiaxial deformationsYield stress predictions of a nonlinear viscoelastic constitutive equation for amorphous polymer solids have been obtained and are compared with the phenomenological von Mises yield criterion. Linear viscoelasticity theory has been extended to include finite strains and a material timescale that depends on the instantaneous temperature, volume, and pressure. Results are presented for yield and the correct temperature and strain-rate dependence in a variety of multiaxial deformations. The present nonlinear viscoelastic constitutive equation can be formulated in terms of either a Cauchy or second Piola-Kirchhoff stress tensor, and in terms of either atmospheric or hydrostatic pressure.
Document ID
19880067685
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Shay, R. M., Jr. (Purdue Univ. West Lafayette, IN, United States)
Caruthers, J. M. (Purdue University West Lafayette, IN, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Structural Mechanics
Meeting Information
Meeting: Developments in Mechanics. Volume 14(b) - Midwestern Mechanics Conference