The effect of fiber-matrix interface properties on damage behavior of composite materials

Document Type : Mechanics article

Authors

1 Mechanical Engineering Department, Damghan University, Semnan, Iran

2 Aerospace Research Institute, Ministry of Science, Research and Technology

3 Aerospace Engineering Department, Amirkabir University of Technology,

Abstract

In this study, using a sample volumetric element, the damage behavior of composite materials has been investigated using representative volume elements (RVEs). The two damage modes of fiber-matrix debonding and matrix cracks are modeled and analyzed as dominant modes. A new algorithm is developed to generate a random distribution of fibers in the RVE, and it is possible to create a fiber distribution with a normal distribution of fiber radii. The fiber material is considered linear elastic and the elastic-plastic matrix behavior is modeled with Drucker–Prager's criterion. The fiber-matrix debonding is modeled by cohesive elements which lead to matrix cracking. Initially, the random distribution of the fiber in RVE was created based on the assumed geometric dimensions and the fiber volume percentage with the code developed in MATLAB software. then, loading, periodic boundary condition, and homogenization process have applied by using the Abaqus software. The results showed that different mesh size is needed for RVEs with various fiber volume fractions. Moreover, the effects of different cohesive zone parameters are described in detail.

Keywords

References

 
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Journal of Modeling in Engineering
Volume 18, Issue 63
December 2020
Pages 113-129

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History

  • Receive Date: 13 June 2020
  • Revise Date: 21 August 2020
  • Accept Date: 06 September 2020

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