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Determination of Damping Ratio of Nanocomposite Plates Using Piezoceramics

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. big picture. Current composites can be improved

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Determination of Damping Ratio of Nanocomposite Plates Using Piezoceramics

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  1. 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

  2. big picture Current composites can be improved for many applications.

  3. b i g p i c t u r e Vibration affects passenger comfort and safety.

  4. 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

  5. Vaccum-Assisted Resin Transform Molding Figure 1: Carbon Nanofiber (CNF) Paper (Gou, Song, Gu1) 1 Gou, J. and G. Song and H. Gu. “Development of Carbon Nanopaper Based Nanocomposites for Structural Damping Applications.” 2007. background Figure 2: Schematic of Vacuum-Assisted Resin Transform Molding Formed Nanocomposite Composition

  6. 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.

  7. methods Preparation Sensor Actuator Spare Sensor

  8. Nanocomposite Plate dSpace Data Acquisition Board Sensor ADC DAC Actuator dSpace Enabled PC Output Input Power Amplifier methods Connections

  9. methods Analysis

  10. Half-Band Power Algorithm 3 dB ω2 ω1 ωn methods Analysis

  11. results Time Domain Response

  12. results Average Damping Ratio vs. Weight % CNF 1.0 1.5 0 0.5

  13. 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

  14. questions

  15. 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!

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