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Finite element analysis of the fiber offsetting effects on the creep behaviour of MMC composites

Mondali, M ; Sharif University of Technology | 2006

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  1. Type of Document: Article
  2. Publisher: Civil-Comp Press , 2006
  3. Abstract:
  4. It has been shown that FEM simulation of creep deformation of composites is somehow very challenging. The type of FEM model, mesh size, element type, internal defects (such as fibre/matrix debonding), and the type of mathematical creep law all affect the calculation of the creep strain rate. In the present study, the fibre offsetting which happens in the manufacturing phase of composites is added to the simulation. It is shown that this defect at some critical point can affect the calculation of creep deformation. Here, the quantification of this phenomenon is performed using 3-D FEM models. Since it has also been shown that the fibre/matrix debonding affects the creep strain rate, the effects of fibre offsetting in presence of debonding was also tested. Comparison of the available experimental creep data with the results obtained by 3-D FEM model shows that the suggested modelling modifications (i.e. debonding and fibre offsetting) and the material modelling (i.e. incorporation of the exponential creep law) play an important role in precise prediction of the creep deformation of the metal matrix composite and the obtained results reasonably match the existing experimental results. © 2006 Civil-Comp Press
  5. Keywords:
  6. Debonding ; Fibers ; Finite element method ; Industrial applications ; Metallic matrix composites ; Three dimensional ; Creep behaviour ; Creep deformations ; Creep strain rate ; Element type ; FEM simulations ; Internal defects ; Manufacturing phase ; Material modelling ; Creep
  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.degruyter.com/document/doi/10.1515/secm-2015-0133/html