This study introduces a simplified micromechanical model for analyzing a combined viscoelastic–viscoplastic response of unidirectional fiber reinforced polymer (FRP) composites. The micromechanical model is derived based on a unit-cell model consisting of fiber and matrix subcells. In this micromechanical model, a limited spatial variation of the local field variables in the fiber and matrix subcells is considered in predicting the overall time-dependent response of composites. The constitutive model for the polymer matrix is based on Schapery’s viscoelastic and Perzyna’s viscoplastic models. An incremental stress–strain relation is considered in solving the time-dependent and inelastic response. A linearized prediction and iterative corrector scheme are formulated to minimize errors from the linearization within the incremental stress–strain relation such that both the micromechanical constraints and the nonlinear constitutive equations are satisfied. The goal is to provide the accurate effective stress–strain relations of the composites and the corresponding viscoelastic and viscoplastic deformation in the polymeric matrix. The micromechanical model is verified by comparing the time-dependent response of the glass FRP composites having several off-axis fiber orientations with experimental data available in the literature.
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July 2012
Research Papers
A Simplified Micromechancial Model for Analyzing Viscoelastic–Viscoplastic Response of Unidirectional Fiber Composites Available to Purchase
Jaehyeuk Jeon,
Jaehyeuk Jeon
Mechanical Engineering Department,
Texas A&M University, 3123 TAMU, College Station, TX 77843-3123
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Anastasia Muliana
Anastasia Muliana
Mechanical Engineering Department,
e-mail: [email protected]
Texas A&M University, 3123 TAMU, College Station, TX 77843-3123
Search for other works by this author on:
Jaehyeuk Jeon
Mechanical Engineering Department,
Texas A&M University, 3123 TAMU, College Station, TX 77843-3123
Anastasia Muliana
Mechanical Engineering Department,
Texas A&M University, 3123 TAMU, College Station, TX 77843-3123
e-mail: [email protected]
J. Eng. Mater. Technol. Jul 2012, 134(3): 031003 (9 pages)
Published Online: May 7, 2012
Article history
Received:
September 21, 2011
Revised:
February 27, 2012
Published:
May 4, 2012
Online:
May 7, 2012
Citation
Jeon, J., and Muliana, A. (May 7, 2012). "A Simplified Micromechancial Model for Analyzing Viscoelastic–Viscoplastic Response of Unidirectional Fiber Composites." ASME. J. Eng. Mater. Technol. July 2012; 134(3): 031003. https://doi.org/10.1115/1.4006508
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