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A new approach to the elastic–plastic stress transfer analysis of metal matrix composites

Khosoussi, S ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1007/s00419-015-1013-8
  3. Publisher: Springer Verlag , 2015
  4. Abstract:
  5. An analytical approach is proposed for studying the elastic–plastic behavior of short-fiber-reinforced metal matrix composites under tensile loading. In the proposed research, a micromechanical approach is employed, considering an axisymmetric unit cell including one fiber and the surrounding matrix. First, the governing equations and the boundary conditions are derived and the elastic solution is obtained based on some shear-lag-type methods. Since under normal loading conditions and according to the fiber material characteristics, the metal matrix undergoes plastic deformation, while the fiber remains within the elastic region, a plastic deformation is considered for the matrix under each small tensile loading step. Then, applying the successive elastic solutions method, all the plastic strain terms are obtained for the matrix. Thereafter, the elastic–plastic stress transfer behavior of the composite is studied considering this plastic deformation. The results are finally compared with the numerical results obtained from the FE analysis of the considered micromechanical model. The proposed method is capable of predicting all plastic strain terms in the matrix and the stress terms, as well
  6. Keywords:
  7. Micromechanical approach ; Plasticity in matrix ; Successive elastic solutions ; Fiber optic sensors ; Fiber reinforced metals ; Fibers ; Metallic matrix composites ; Metals ; Micromechanics ; Plastic deformation ; Polymer matrix composites ; Stress analysis ; Tensile stress ; Analytical approach ; Elastic solutions ; Governing equations ; Micro-mechanical modeling ; Micromechanical approach ; Shear lag ; Short fiber reinforced metal matrix composites ; Tensile loading ; Loading
  8. Source: Archive of Applied Mechanics ; Volume 85, Issue 11 , November , 2015 , Pages 1701-1717 ; 09391533 (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs00419-015-1013-8