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      • HARVEST
      • Electronic Theses and Dissertations
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      ON FURTHER MODELING OF STIFFNESS AND DAMPING OF CORRUGATED CARDBOARDS FOR VIBRATION ISOLATION APPLICATION

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      ZHANG-THESIS.pdf (1.876Mb)
      Date
      2015-01-13
      Author
      zhang, fan
      Type
      Thesis
      Degree Level
      Masters
      Metadata
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      Abstract
      In a recent study, an environment-friendly material, corrugated cardboard, was used as a building block for the vibration isolator with a preliminary study. The present thesis was motivated to advance technology for improving the design of such a corrugated cardboard vibration isolator with a focus on the modeling of its stiffness and damping. In particular, this study has performed the following works: (1) improving the FE (finite element) model of the stiffness of the corrugated cardboards by more accurately identifying the material parameters in the cardboard material constitutive equation; (2) analyzing the effect of the error in geometry of the corrugated cardboards in the FE model; (3) developing the Rayleigh damping model of the corrugated cardboards and evaluating its accuracy. Several conclusions were drawn from this study: (1) the parameter identification procedure based on the inverse analysis is feasible for improving the accuracy of the model of the stiffness of the cardboard. (2) The FE model of the cardboards with a greater in-plane geometrical deflection has less vertical compressive stiffness. The geometrical deflections of the corrugated cardboards also change the condition of the contact friction stress and the compressive deformation. (3) Rayleigh damping model is accurate enough for calculating the damping of the corrugated cardboards. The contributions of the thesis include: (1) provision of a more accurate model for the compressive stiffness the corrugated cardboards, (2) finding that the friction between the cardboard and the vibrator and the geometrical error of the cardboards have a significant influence over the accuracy of the FE model, (3) finding that in practice the foregoing influence can significantly degraded the performance of the cardboards as a vibrator isolator, and (4) provision of a model for the compressive damping of the corrugated cardboards.
      Degree
      Master of Science (M.Sc.)
      Department
      Biomedical Engineering
      Program
      Biomedical Engineering
      Supervisor
      Zhang, Chris
      Committee
      Wu, Fangxiang; Kushwaha, Lal
      Copyright Date
      October 2014
      URI
      http://hdl.handle.net/10388/ETD-2014-10-1871
      Subject
      Corrugated cardboard
      Finite Element (FE)
      Stiffness
      Vibration isolation
      Rayleigh damping
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      • Graduate Theses and Dissertations
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