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Effect of fiber volume fraction on longitudinal tensile properties of SiCf/Ti-6Al-4V composites

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Abstract

The longitudinal tensile properties of SiCf/Ti-6Al-4V composites with different fiber volume fractions were simulated by the Monte Carlo 2-D finite element model. The random distribution of fiber strength was expressed by the two-parameter Weibull function. Meanwhile, contact elements and birth-death elements were used to describe the interfacial sliding process after debonding and fiber breakage (or matrix cracking) respectively, which was realized by subroutine complied in ANSYS-APDL (ANSYS Parametric Design Language). The experimental results show that the yield stress and ultimate tensile strength of SiCf/Ti-6Al-4V composites increase with increasing fiber volume fraction, while the corresponding strain of them is just on the contrary. In addition, almost the same failure mode is obtained in SiCf/Ti-6Al-4V composites with various fiber volume fractions when the interfacial shear strength is fixed. Finally, the tensile strength predicted by finite element analysis is compared with that predicted by Global load-sharing model, Local load-sharing model and conventional rule of mixtures, thus drawing the conclusion that Local load-sharing model is very perfect for the prediction of the ultimate tensile strength.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Taiyuan Institute of Technology, Taiyuan, 030008, China

    Juhong Lou  (娄菊红) & Shenquan Liu

  2. School of Materials, Northwestern Polytechnical University, Xi’an, 710072, China

    Yanqing Yang

Authors
  1. Juhong Lou  (娄菊红)
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  2. Yanqing Yang
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  3. Shenquan Liu
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Correspondence to Juhong Lou  (娄菊红).

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Funded by the National Natural Science Foundation of China (51271147)

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Lou, J., Yang, Y. & Liu, S. Effect of fiber volume fraction on longitudinal tensile properties of SiCf/Ti-6Al-4V composites. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 32, 278–283 (2017). https://doi.org/10.1007/s11595-017-1592-z

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  • DOI: https://doi.org/10.1007/s11595-017-1592-z

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