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Finite difference solution of steady state creep deformations in a short fiber composite in presence of fiber/matrix debonding

Ghavami, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2009.11.024
  3. Abstract:
  4. A finite difference technique is developed to predict the second stage creep displacement rates and stress analysis of a short fiber metal matrix composite subjecting to a constant axial load through a micromechanical approach. The technique is capable to take into account the presence of interfacial debonding as one of the main factors affecting the creep performance of short fiber composites. The exponential law is adopted to describe the matrix creep behavior. Also, a model for prediction of interfacial debonding at fiber/matrix interface is developed using a stress based method. The obtained results could greatly help to better understand the flow pattern of matrix material and the load transfer mechanism between fiber and matrix with and without the presence of interfacial debond. The predicted strain rate by the proposed approach exhibits good agreement with the experimental results
  5. Keywords:
  6. A. Composites ; E. Creep ; F. Defects ; Creep behaviors ; Creep displacement ; Creep performance ; Exponential law ; Fiber/matrix interface ; Finite-difference solution ; Finite-difference techniques ; Interfacial debond ; Interfacial debonding ; Load transfer mechanism ; matrix ; Matrix materials ; Metal matrix composites ; Micromechanical approach ; Short Fiber ; Short fiber composites ; Steady-state creep ; Creep ; Debonding ; Defects ; Fibers ; Flow patterns ; Strain rate ; Stress analysis ; Metallic matrix composites
  7. Source: Materials and Design ; Volume 31, Issue 5 , 2010 , Pages 2616-2624 ; 02641275 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0261306909006438