skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Modeling the anisotropic finite-deformation viscoelastic behavior of soft fiber-reinforced composite materials.

Abstract

This paper presents constitutive models for the anisotropic, finite-deformation viscoelastic behavior of soft fiber-reinforced composites. An essential assumption of the models is that both the fiber reinforcements and matrix can exhibit distinct time-dependent behavior. As such, the constitutive formulation attributes a different viscous stretch measure and free energy density to the matrix and fiber phases. Separate flow rules are specified for the matrix and the individual fiber families. The flow rules for the fiber families then are combined to give an anisotropic flow rule for the fiber phase. This is in contrast to many current inelastic models for soft fiber-reinforced composites which specify evolution equations directly at the composite level. The approach presented here allows key model parameters of the composite to be related to the properties of the matrix and fiber constituents and to the fiber arrangement. An efficient algorithm is developed for the implementation of the constitutive models in a finite-element framework, and examples are presented examining the effects of the viscoelastic behavior of the matrix and fiber phases on the time-dependent response of the composite.

Authors:
;  [1];
  1. (Sandia National Laboratories, Albuquerque, NM)
Publication Date:
Research Org.:
Sandia National Laboratories
Sponsoring Org.:
USDOE
OSTI Identifier:
946581
Report Number(s):
SAND2007-1149J
TRN: US200903%%507
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Proposed for publication in International Journal of Solids and Structures.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALGORITHMS; COMPOSITE MATERIALS; FIBERS; FREE ENERGY; IMPLEMENTATION; SIMULATION

Citation Formats

Nguyen, Tai D., Boyce, Brad Lee, and Jones, Reese E.. Modeling the anisotropic finite-deformation viscoelastic behavior of soft fiber-reinforced composite materials.. United States: N. p., 2007. Web. doi:10.1016/j.ijsolstr.2007.06.020.
Nguyen, Tai D., Boyce, Brad Lee, & Jones, Reese E.. Modeling the anisotropic finite-deformation viscoelastic behavior of soft fiber-reinforced composite materials.. United States. doi:10.1016/j.ijsolstr.2007.06.020.
Nguyen, Tai D., Boyce, Brad Lee, and Jones, Reese E.. Thu . "Modeling the anisotropic finite-deformation viscoelastic behavior of soft fiber-reinforced composite materials.". United States. doi:10.1016/j.ijsolstr.2007.06.020.
@article{osti_946581,
title = {Modeling the anisotropic finite-deformation viscoelastic behavior of soft fiber-reinforced composite materials.},
author = {Nguyen, Tai D. and Boyce, Brad Lee and Jones, Reese E.},
abstractNote = {This paper presents constitutive models for the anisotropic, finite-deformation viscoelastic behavior of soft fiber-reinforced composites. An essential assumption of the models is that both the fiber reinforcements and matrix can exhibit distinct time-dependent behavior. As such, the constitutive formulation attributes a different viscous stretch measure and free energy density to the matrix and fiber phases. Separate flow rules are specified for the matrix and the individual fiber families. The flow rules for the fiber families then are combined to give an anisotropic flow rule for the fiber phase. This is in contrast to many current inelastic models for soft fiber-reinforced composites which specify evolution equations directly at the composite level. The approach presented here allows key model parameters of the composite to be related to the properties of the matrix and fiber constituents and to the fiber arrangement. An efficient algorithm is developed for the implementation of the constitutive models in a finite-element framework, and examples are presented examining the effects of the viscoelastic behavior of the matrix and fiber phases on the time-dependent response of the composite.},
doi = {10.1016/j.ijsolstr.2007.06.020},
journal = {Proposed for publication in International Journal of Solids and Structures.},
number = ,
volume = ,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 2007},
month = {Thu Feb 01 00:00:00 EST 2007}
}