Mechanical properties of 3D-woven composites with guide sleeves

Abstract

In this study, the preforms of 3D woven composite materials were made by a flexible oriented 3D composite woven process. The vacuum-assisted resin infusion (VARI) process was used to impregnate the preforms. The short-beam shear test, the compression test, and SEM were used to investigate the interlaminar shear performance and the compression behavior of the 3D woven composite with guide sleeves, and the effect of the guide sleeves on the above properties. It is indicated that the interlaminar shear behavior of 3D woven composites with guide sleeves showed the typical fracture characteristics of a pseudoplastic material. And the fracture modes of interlaminar shear mainly include interlaminar shear fracture and tensile fracture of fibers at the bottom. The interlaminar shear strength of materials increased with the diameter and interval of guide sleeves decreasing. Furthermore, the loss of in-plane compression properties of the materials brought by guide sleeves could be effectively avoided by reasonable control of the diameter and the volume fracture of guide sleeves.

Keywords

3D Woven composites guide sleeve short-beam shear compression

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