Determination of Damping Ratio of Nanocomposite Plates Using Piezoceramics

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Determination of Damping Ratio of Nanocomposite
Plates Using Piezoceramics

• Christiana Chang
• Haichang Gu, PhD
• Gangbing Song, PhD

Department of Mechanical Engineering University
of Houston
A National Science Foundation Sponsored Project
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big picture
Current composites can be improved for many
applications.
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b i g p i c t u r e
Vibration affects passenger comfort and safety.
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objective
Project Goals

• Obtain time-domain and frequency-domain responses
  of nanocompostite plates
• Determine damping ratio of nanocomposite plates
• Analyze results for relationship between weight
  of Carbon Nanofiber (CNF) and damping ratio

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Vaccum-Assisted Resin Transform Molding
background
Figure 2 Schematic of Vacuum-Assisted Resin
Transform Molding Formed Nanocomposite Composition
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background
Piezoceramics
Figure 2 Schematic of Lead Zirconate Titanate
(PZT) Operation (Olmi, Song, Mo2) 2 Olmi, C and
G. Song and Y.L. Mo. Development of an
Innovative Smart Vibration Platform. The
Proceedings of the 4th Japan-China-US Symposium
on Structural Control and Monitoring, Oct.
16-17, 2006.
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methods
Preparation
Sensor
Actuator
Spare Sensor
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methods
Connections
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methods
Analysis
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methods
Analysis
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results
Time Domain Response
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results
Average Damping Ratio vs. Weight CNF
1.0
1.5
0
0.5
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conclusions
Conclusions

• Carbon Nanofibers (CNF) in the composite matrix
  significantly damp vibration magnitude
• As weight of CNF increases, magnitude of
  response decreases
• As weight of CNF increases, damping ratio
  increases
• VARTM molding is capable of producing damped CNF
  nanocomposite

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questions
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g r a t I t u d e
Acknowledgements

• National Science Foundation for Funding of REU
• University of Houston Host of Program
• Smart Materials and Structures Lab Host of
  Project
• Dr. Jan Gou, University of South Alabama
  Supplier of Nanocomposite Plates
• REU Participants For being there!