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An analytical model for prediction of the steady state creep deformations and stresses of short fiber composites

Mondali, M ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. Publisher: 2008
  3. Abstract:
  4. A new analytical model based on the shear-lag theory is developed for stress analysis and steady state creep deformation of short fiber composites subjected to an applied axial load. A perfect fiber/matrix interface is assumed and an exponential law is considered for describing the steady state creep behavior of the matrix material. The matrix stress field components obtained from the proposed analytical solution satisfies the equilibrium and constitutive creep equations. Also, the obtained axial stress in the fiber in an average form satisfies the equilibrium requirements within the fiber and between the fiber and the matrix. Moreover, the above stress field components satisfy well the overall boundary conditions including the surface conditions, the interface continuity conditions, and the axial force equilibrium conditions. These analytical results are then validated by the FEM modeling Interestingly, good agreements are found between the analytical and numerical predictions for all the stress, strain rate, and displacement rate components
  5. Keywords:
  6. Analytical and numerical prediction ; Analytical results ; Continuity conditions ; Fiber/matrix interface ; Shear lag theory ; Short fiber composites ; Steady-state creep ; Surface conditions ; Aerodynamics ; Analytical models ; Creep ; Finite element method ; Interfaces (materials) ; Models ; Stress analysis ; Fibers
  7. Source: 26th Congress of International Council of the Aeronautical Sciences 2008, ICAS 2008, Anchorage, AK, 14 September 2008 through 19 September 2008 ; Volume 2 , 2008 , Pages 2829-2840 ; 9781605607153 (ISBN)
  8. URL: https://www.sciencedirect.com/science/article/abs/pii/S0261306908003166