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

Journal Article · Thu Feb 01 00:00:00 EST 2007 · Proposed for publication in International Journal of Solids and Structures.

DOI:https://doi.org/10.1016/j.ijsolstr.2007.06.020· OSTI ID:946581

Nguyen, Tai D; Boyce, Brad Lee ^[1]; Jones, Reese E

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1. Sandia National Laboratories, Albuquerque, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 946581
• Report Number(s): SAND2007-1149J; TRN: US200903%%507
• Journal Information: Proposed for publication in International Journal of Solids and Structures., Journal Name: Proposed for publication in International Journal of Solids and Structures.
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALGORITHMS
COMPOSITE MATERIALS
FIBERS
FREE ENERGY
IMPLEMENTATION
SIMULATION