Bending Properties and Failure Mechanisms of Tapered 3D Braided Composites

Abstract:

Tapered 3D braided composites are prepared by column yarn-reduction technique, unit yarn-reduction technique and cutting, respectively. Bending properties in the tapered regions of the composites are obtained by three-point bending tests, and SEM photographs of the fracture surfaces are observed to analyze the failure mechanisms. Results show that bending modulus and bending strength of the yarn-reduction composites are significantly higher than those of the cut composites, and the unit yarn-reduction composites are slightly stronger than the column yarn-reduction composites. The saw-tooth propagation of matrix crackings and interfacial debondings are the primary failure mechanisms of the yarn-reduction composites, while yarn breakages and yarn pulling-outs are the main failure modes of the cut composites.

• Periodical: Advanced Materials Research (Volumes 332-334)
• Pages: 1468-1471
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.332-334.1468
• Online since: September 2011
• Authors: Can Can Cheng, Zhao Lin Liu, Li Fang Liu, Jian Yong Yu
• Keywords: Bending Properties, Failure Mechanism, Tapered 3D Braided Composites, Yarn-Reduction Techniques

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