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Enhancing CFRP damping with graphene nanoplatelets: experiments versus finite element analysis.

Ch V Katsiropoulos1,2, G I Giannopoulos3, P Pappas2

  • 1Department of Chemical Engineering, University of Patras, Patras 26504, Greece.

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Summary

Adding graphene nanoplatelets (GNPs) to carbon fiber-reinforced polymer (CFRP) composites significantly improves their damping capabilities. This enhancement was validated through experiments and a validated finite element model, showing GNP concentration

Keywords:
2D materialsdamping propertiesfinite element analysis (FEA)graphenepolymer-matrix composites (PMCs)vibration

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Area of Science:

  • Materials Science
  • Composite Materials
  • Nanotechnology

Background:

  • Carbon fiber-reinforced polymers (CFRPs) are widely used but often require improved damping.
  • Graphene nanoplatelets (GNPs) offer potential for enhancing composite material properties.

Purpose of the Study:

  • To investigate the effect of graphene nanoplatelets (GNPs) on the damping properties of CFRP composites.
  • To develop and validate a computational model for predicting the damping behavior of GNP-enhanced CFRPs.

Main Methods:

  • Fabrication of epoxy and CFRP specimens with varying GNP concentrations.
  • Free vibration experiments to measure damping ratios.
  • Development of a finite element method (FEM) model using representative volume elements.

Main Results:

  • Experimental results demonstrated a clear enhancement in damping with increasing GNP concentration.
  • The FEM model accurately predicted the damping performance of the hybrid nanocomposites.
  • A strong correlation was observed between experimental and numerical damping data.

Conclusions:

  • Graphene nanoplatelets effectively enhance the damping properties of CFRP composites.
  • The developed FEM model is a reliable tool for simulating and predicting damping in these advanced materials.
  • GNP mass fraction is a critical factor in achieving improved damping in CFRPs.