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A modified three-dimensional analytical model for stress prediction in short fibre composites

Pahlavanpour, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: Civil-Comp Press , 2006
  3. Abstract:
  4. A modified analytical model is developed for analysis of 3-D elastic stress fields in short fibre composites subjected to an applied axial load. Two sets of exact displacement solutions for the matrix and fibre are derived based on the theory of elasticity. The superposition of these two solutions are then used to obtain the analytical expressions for the 3-D stress field components over the entire composite system including the fibre end region which is modelled by the use of imaginary fibre technique. The main difference with the previous works here is that the stress field is considered to be dependent on both radial and axial directions. Such an assumption made it possible to calculate the dependency of the fibre and imaginary fibre stresses and strains to r-direction, the fact that has been ignored by previous works. The analytical results are then validated by the FEM modelling. Interestingly, good agreements are found between the analytical and numerical predictions for all the stress, strain and displacement components. Another superiority of the proposed analytical model is in its capability of solving problems with fibre/matrix debonding defect. © 2006 Civil-Comp Press
  5. Keywords:
  6. Analytical models ; Debonding ; Elasticity ; Finite element method ; Models ; Strain ; Stresses ; Structural design ; Three dimensional ; Analytical and numerical prediction ; Analytical expressions ; Displacement components ; Displacement solution ; Elastic stress field ; Interface debonding ; Short fibre composites ; Theory of elasticity ; Fibers
  7. Source: 8th International Conference on Computational Structures Technology, CST 2006, Las Palmas de Gran Canaria, 12 September 2006 through 15 September 2006 ; Volume 83 , 2006 ; 17593433 (ISSN); 9781905088089 (ISBN)
  8. URL: https://www.ctresources.info/ccp/paper.html?id=4042