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Measurement of In-Plane Shear Strength of Carbon/Carbon Composites by Compression of Double-Notched Specimens

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Abstract

The compression of a double-notched specimen was used to determine the in-plane shear strength (IPSS) of a carbon/carbon composite in the paper. The effects of the notch distance (L), thickness (T), and notch width (W) and supporting jig on the IPSS of the double-notched specimens were investigated numerically and experimentally. The fracture surfaces were examined by a scanning electron microscope. It was found that the IPSS varied with L. Thin specimen yielded low strength. W has little effect on IPSS. The main failure modes include the matrix shear cracking, delamination, fracture and pullout of fibers or fiber bundles. Meanwhile, a supporting jig can provide lateral support and prevent buckling, therefore lead to the failure in a shear mode.

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Acknowledgments

The authors would like to acknowledge the financial support from National Science Foundation of China (Grant No. 50702045), Ph.D. Programs Foundation of Ministry of Education of China (Grant No. 20070699007) and the Program for New Century Excellent Talents in University (NCET-08-0460).

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  1. National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, 547 Mailbox, 127 Youyi West Road, Xi’an, 710072, Shaanxi, People’s Republic of China

    K. F. Yan, C. Y. Zhang, S. R. Qiao, C. Z. Song, D. Han & M. Li

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  1. K. F. Yan
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  2. C. Y. Zhang
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  3. S. R. Qiao
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Correspondence to C. Y. Zhang.

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Yan, K.F., Zhang, C.Y., Qiao, S.R. et al. Measurement of In-Plane Shear Strength of Carbon/Carbon Composites by Compression of Double-Notched Specimens. J. of Materi Eng and Perform 21, 62–68 (2012). https://doi.org/10.1007/s11665-010-9823-x

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  • DOI: https://doi.org/10.1007/s11665-010-9823-x

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