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Effect of postpeak tension-softening behavior on the fracture properties of 2-D carbon fiber reinforced carbon composite

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Abstract

The fracture properties of commercial carbon fiber reinforced carbon (C/C) composites (CCM190C, CCM191C) that have different interfacial shear strength were investigated. Postpeak tension-softening phenomena were observed through the fracture mechanics test for these composites. The failure manner in the fracture process zone was primarily fiber pull-out for CCM190C and fiber breakage for CCM191C, respectively. It was confirmed that the scale of pseudo strain hardening for CCM190C with low interfacial shear strength was larger than that of CCM191C. The bridging energy at the postpeak part and the total energy consumed to produce a unit area of fracture surface were calculated based on the J-based technique. The bridging energy at the postpeak part accounted for 12.3% of the total energy consumed to produce a unit area of fracture surface for CCM190C. From this result, it can be deduced that the effect of the postpeak bridging energy on the fracture toughness is large for CCM190C. In contrast, the contribution of the postpeak bridging energy for the total energy per fracture surface was very small for CCM191C.

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Authors and Affiliations

  1. Division of Mechanical Design Engineering, College of Engineering, Chonbuk National University, 664-14, 1-Ga, Duckjin-Dong, Duckjin-Gu, Jeonju, 561-756, Korea

    Yonjig Kim

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  1. Yonjig Kim
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Correspondence to Yonjig Kim.

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This paper was recommended for publication in revised form by Associate Editor Chongdu Cho

Yonjig Kim received B. S. and M. S. degrees in Mechanical Design Engineering and Mechanical Engineering at Chonbuk National University in 1983 and 1985, respectively. He enlisted in the army as a soldier and leaved the army in 1988, and then got a ph. D. degree in Mechanical Engineering at Chonbuk National University in 1993. Dr. Kim is currently working as a professor in his alma mater, Chonbuk National University. His major area of study is materials and fracture mechanics and he is interested mainly in fracture of fiber reinforced polymer composites.

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Kim, Y. Effect of postpeak tension-softening behavior on the fracture properties of 2-D carbon fiber reinforced carbon composite. J Mech Sci Technol 23, 8–13 (2009). https://doi.org/10.1007/s12206-008-0929-0

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  • DOI: https://doi.org/10.1007/s12206-008-0929-0

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