Influence of span-to-thickness ratio on the three-point bending behavior of carbon fiber composites

doi:10.19936/j.cnki.2096-8000.20230328.012

Abstract

Abstract: Herein, we have utilized T700SC and T1100G carbon fibers from Toray (Japan) as reinforcement and self-prepared resin system as matrix to fabricate the unidirectional carbon fiber composite laminates through molding method. The variation of three-point bending strength of two kinds of composite laminates containing different span-to-thickness ratios of 16∶1, 32∶1, 40∶1 and 50∶1 was studied respectively. Meanwhile the bending failure modes of the corresponding composite laminates are analyzed. Our results indicate that at the span-to-thickness ratios of 32∶1 and 40∶1, both T700 and T1100 carbon fiber composites achieve the highest bending strength, with the common failure modes of the upper surface compression and delamination. At the standard span-to-thickness ratio of 32∶1, the bending strength of T1100 carbon fiber composites is up to 1 779.87 MPa, only 2.61% higher than that of T700 composites.

Key words: composite materials, span-to-thickness ratio, three-point bending, failure mode

CLC Number:

TB332

WANG Yichao, LI Peng, ZHOU Juping. Influence of span-to-thickness ratio on the three-point bending behavior of carbon fiber composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(3): 83-88.

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