Investigating Effects of Interphase on Mechanical Properties of Particulate Metal-Matrix Nanocomposites Using Surface Elasticity

Ebrahimi Estahbanati, Parvin | 2012

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 43929 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Naghdabadi, Reza
  7. Abstract:
  8. Due to ignoring the effect of length scale and neglecting the details at nanosize, classical methods are not sufficiently accurate to determine the properties of nanostructured materials. More reliable results can be obtained, using surface elasticity theory. Lots of analytical, experimental and numerical investigations have been done on the effect of interphase on the mechanical properties of polymer nanocomposites whereas metal matrix nanocomposites are in the first stages of analytical and numerical researches and have attracted so much attention.
    The main objective of this research is to investigate the effects of interphase as well as coating, on the mechanical behavior of metal matrix nanocomposites reinforced by nanoparticles. To this end, considering a coating or an interphase around the reinforcement and using the surface elasticity method, the relations in plane stress and plane strain cases are obtained where both the homogeneous and functionally graded interphase (coating) are considered.
    The results show that the mechanical behavior of nanocomposites depends on the size of inclusion and is affected by considering the interphase. Neglecting this effect may lead to inaccurate predictions. Furthermore, by using functionally graded coating around the reinforcement, the desired parameters can be controlled. Also, the proper range of each parameter to reach the desired properties is specified
  9. Keywords:
  10. Nanocomposite ; Surface Elasticity ; Nanoparticles ; Interphase ; Surface Stress

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