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Determination of Viscoelastic Response of Interphase Region in Carbon Fiber Reinforced Epoxy Using AFM Indentation

  • Libin K. BabuEmail author
  • Raman Singh
Conference paper
Part of the Conference Proceedings of the Society for Experimental Mechanics Series book series (CPSEMS)

Abstract

The interphase region in fiber reinforced polymer (FRP) composites exhibits time dependent behavior due to the viscoelasticity of the matrix. AFM based (Atomic Force Microscopy) indentation utilizing different dwell periods for various constant loads are employed to analyze the creep behavior of the near–fiber region in carbon fiber reinforced epoxy. It is observed that along a radial line to the fiber, the relaxation of the polymer is lower closer to the fiber. Loading in the interphase region is known to be influenced by the fiber constraint effect. Therefore, 3D FE (Finite Element) simulations using an assumed non-linear elastic and linear viscoelastic behavior of epoxy is used to determine the extent of the influence of the fiber constraint on the viscoelastic response of the interphase region.

Keywords

Carbon fiber reinforced composites Viscoelasticity Fiber constraint AFM indentation 

Notes

Acknowledgements

This material is based upon work supported by the National Science Foundation under Grant No. 1649481.

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Copyright information

© Society for Experimental Mechanics, Inc. 2020

Authors and Affiliations

  1. 1.Department of Integrated Engineering Minnesota State UniversityMankatoUSA
  2. 2.School of Mechanical and Aerospace EngineeringOklahoma State UniversityTulsaUSA
  3. 3.School of Materials Science and EngineeringOklahoma State UniversityTulsaUSA

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