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Modeling of evolving damage in high temperature polymer matrix composites subjected to thermal oxidation

  • Stretching the Endurance Boundary of Composite Materials: Pushing the Performance Limit of Composite Structures
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Abstract

This paper describes mechanism-based modeling of damage evolution in high temperature polymer matrix composites (HTPMC) under thermo-oxidative aging conditions. Specifically, a multi-scale model based on micro-mechanics analysis in conjunction with continuum damage mechanics (CDM) is developed to simulate the accelerated fiber–matrix debond growth in the longitudinal direction of a unidirectional HTPMC. Using this approach, one can relate the behavior of composites at the micro-level (representative volume element) to the macro-level (structural element) in a computationally tractable manner. Thermo-oxidative aging is simulated with diffusion-reaction model in which temperature, oxygen concentration, and weight loss effects are considered. For debond growth simulation, a model based on Darcy’s laws for oxygen permeation in the fiber–matrix interface is employed, that, when coupled with polymer shrinkage, provides a mechanism for permeation-controlled debond growth in HTPMC. Benchmark of model prediction with experimental observations of oxidation layer growth is presented, together with a laminate thermo-oxidative life prediction model based on CDM to demonstrate proof-of-concept.

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Acknowledgements

The authors gratefully acknowledge the support of the Mechanics of Multifunctional Materials & Microsystems Program of the Air Force Office of Scientific Research, with Dr. Byung “Les” Lee as Program Manager.

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Authors and Affiliations

  1. Department of Aerospace Engineering and Mechanics, University of Alabama, Tuscaloosa, AL, 35487-0280, USA

    Samit Roy & Sushil Singh

  2. Air Force Research Laboratory (AFRL), Materials and Manufacturing Directorate, Structural Materials Branch (MLBC), Wright-Patterson AFB, Dayton, OH, 45433-7750, USA

    Gregory A. Schoeppner

Authors
  1. Samit Roy
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  2. Sushil Singh
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  3. Gregory A. Schoeppner
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Correspondence to Samit Roy.

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Roy, S., Singh, S. & Schoeppner, G.A. Modeling of evolving damage in high temperature polymer matrix composites subjected to thermal oxidation. J Mater Sci 43, 6651–6660 (2008). https://doi.org/10.1007/s10853-008-2691-1

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  • DOI: https://doi.org/10.1007/s10853-008-2691-1

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