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Integration of Micromechanical and Probabilistic Analysis Models of Nanocomposites

Pilla, Srikanth
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1134422032

Abstract Details

2005, Master of Science in Mechanical Engineering, University of Toledo, Mechanical Engineering.
Carbon nanofiber/nanotube reinforced composites show great potential as a replacement for conventional composite materials because of their exceptional properties. Experimental results demonstrate that substantial improvements in the mechanical behavior of a nano-structured composite can be attained using small amounts of carbon nanofibers/nanotubes as reinforcing phase. To date many researchers have theoretically predicted the effective behavior of conventional composites and nanocomposites using traditional methods (for example using Mori-Tanaka or Halpin-Tsai models). The effect of the interface between the nanofibers/nanotubes and the matrix has also been investigated. There is uncertainty in the value of the modulus of the reinforcement in nanocomposites because it is difficult to measure the modulus. Moreover there is variability in the matrix and interface moduli. Therefore, it is important to study the effect of uncertainty and variability in the properties of the phase materials on the properties of nanocomposite. A large amount of work has been done on modeling uncertainty and variability in conventional materials (e.g., aluminum, steel or long fiber composites) and on predicting the probability distribution of the performance characteristics of structures made of these materials. However, an integrated tool is needed for probabilistic analysis of structures made of carbon nanofiber/nanotube composites. In this thesis, existing models for stiffness analysis of conventional composites and nanocomposites have been modified and integrated with tools for deterministic and probabilistic analysis of structures. A two-step model has been developed for determining deterministically the stiffness of nanocomposite materials considering the effect of the interface between the reinforcement and the matrix. A methodology consisting of the above two-step model, deterministic analysis of plates and probabilistic analysis of structures has also been developed and demonstrated. It is shown that it is important to consider the interface between the reinforcement and polymer matrix and the variability and uncertainty in the properties of the phase materials of a nanocomposite.
Efstratios Nikolaidis (Advisor)
143 p.
Engineering, Mechanical
nanocomposites; micromechanical modeling; probabilistic analysis; reliability analysis; interface modeling

Recommended Citations

Citations

  • Pilla, S. (2005). Integration of Micromechanical and Probabilistic Analysis Models of Nanocomposites [Master's thesis, University of Toledo]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1134422032

    APA Style (7th edition)

  • Pilla, Srikanth. Integration of Micromechanical and Probabilistic Analysis Models of Nanocomposites. 2005. University of Toledo, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=toledo1134422032.

    MLA Style (8th edition)

  • Pilla, Srikanth. "Integration of Micromechanical and Probabilistic Analysis Models of Nanocomposites." Master's thesis, University of Toledo, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1134422032

    Chicago Manual of Style (17th edition)

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© 2005, all rights reserved.
This open access ETD is published by University of Toledo and OhioLINK.