This paper presents results of a computational study focused on examining the role of manufacturing-induced voids in the initiation and growth of damage at the microstructural level in polymer matrix composites loaded in tension normal to fibers. The polymer deformation is described by an improved macromolecular constitutive model accounting for strain-rate-, pressure-, and temperature-sensitive yielding, isotropic hardening before peak yield, intrinsic postyield softening, and rapid anisotropic hardening at large strains. A new craze model that accounts for craze initiation, growth, and breakdown mechanisms is employed. An energy-based criterion is used for cavitation induced cracking that can lead to fiber/matrix debonding. The role of voids is clarified by conducting a comparative study of unit cells with and without voids. The effects of strain rate and temperature are investigated by a parametric study. The overall composite stress-strain response is also depicted to indicate manifestation of microlevel failure on macroscopic behavior.
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April 2008
Research Papers
Effects of Manufacturing-Induced Voids on Local Failure in Polymer-Based Composites
K. A. Chowdhury,
K. A. Chowdhury
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843
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R. Talreja,
R. Talreja
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843
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A. A. Benzerga
A. A. Benzerga
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843
Search for other works by this author on:
K. A. Chowdhury
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843
R. Talreja
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843
A. A. Benzerga
Department of Aerospace Engineering,
Texas A&M University
, College Station, TX 77843J. Eng. Mater. Technol. Apr 2008, 130(2): 021010 (9 pages)
Published Online: March 13, 2008
Article history
Received:
August 3, 2007
Revised:
January 8, 2008
Published:
March 13, 2008
Citation
Chowdhury, K. A., Talreja, R., and Benzerga, A. A. (March 13, 2008). "Effects of Manufacturing-Induced Voids on Local Failure in Polymer-Based Composites." ASME. J. Eng. Mater. Technol. April 2008; 130(2): 021010. https://doi.org/10.1115/1.2841529
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