Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Experimental and Finite Element Analysis of Free Vibration Behaviour of Graphene Oxide Incorporated Carbon Fiber/Epoxy Composite

  • Adak, Nitai Chandra (Academy of Scientific and Innovative Research (AcSIR), CSIR-CMERI) ;
  • Uke, Kamalkishor Janardhanji (Condition Monitoring and Structural Analysis Division, Council of Scientific and Industrial Research-Central Mechanical Engineering Research Institute) ;
  • Kuila, Tapas (Academy of Scientific and Innovative Research (AcSIR), CSIR-CMERI) ;
  • Samanta, Pranab (Academy of Scientific and Innovative Research (AcSIR), CSIR-CMERI) ;
  • Lee, Joong Hee (Advanced Materials Research Institute for BIN Fusion Technology (BK Plus Global, Program), Department of BIN Convergence Technology, Chonbuk National University)
  • Received : 2018.10.17
  • Accepted : 2018.12.11
  • Published : 2018.12.31
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Abstract

In the present study, the effect of GO in damping capacity of CF/epoxy laminates was studied via free vibration analysis. The composite laminates were manufactured by using vacuum assisted resin transfer molding technique. The damping properties of the prepared hybrid composites were determined in terms of natural frequency and damping ratio in free vibration test. The foremost aspire of this investigation was to compare the vibration properties i.e. natural frequency and modal damping of the prepared composites with the numerical results. The numerical study was carried out via FEA using $ANSYS^{TM}$ workbench software. The parametric study of the numerical models was also studied considering the beam free length and the beam thickness. It was found that the incorporation of GO enhanced the damping capacity of the composite and the variation of natural frequencies in mode1varied by 2-5% compared to the experimental study.

Keywords

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Fig. 1. Schematics of the experimental set-up for free vibration

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Fig. 2. Definition of ω1, ω2 and ωn according to the half-bandwidth method

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Fig. 3. Numerical model with meshed elements for free vibration test

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Fig. 4. Exciting frequency response of (a) pure CF/epoxy and (b)0.1 wt%, (c) 0.2 wt%, (d) 0.4 wt% GO incorporated CF/epoxy composite

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Fig. 5. Mode shapes for (a) mode 1 (b) mode 2 (c) mode 3 of 0.2 wt% GO incorporated CF/epoxy composite

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Fig. 6. Variation of frequencies depending on (a) beam free length and (b) beam thickness of 0.2 wt% GO incorporated CF/epoxy composite

Table 1. Calculated values of free vibration results of GO incorporated CF/epoxy composites

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Table 2. Calculated values of frequencies of 0.2 wt% GO incorporated CF/epoxy numerical model

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