Shear properties of three‐dimensional woven composite reinforcements

Abstract

This paper presents a comprehensive experimental study and detailed mechanistic interpretations of the shear deformation of three‐dimensional (3D) reinforcements. Six types of 3D angle interlock glass fiber preforms (3DAP) were fabricated using a range of weave parameters including the fabric density, fabric layer, and yarn linear density. A modified picture frame was developed to ensure a pure shear load during the test. Through a series of comprehensive tests, our results demonstrated that the fabric density played a key role in the mechanical properties of 3DAP and that the reinforcements with low fabric density and yarn linear density were easy to shear. The shear deformation mechanism was analyzed based on the meso‐structure. It is expected that this research will provide preliminary work for building a theoretical model of 3D woven preform. POLYM. COMPOS., 38:244–251, 2017. © 2015 Society of Plastics Engineers

The influence of yarn fineness and number of yarn layers on in-plane shear properties of 3-D woven fabric

“…The 3-D woven fabric exhibits exceptional formability, except excellent mechanical properties, hence, the layering process is considerably simplified, the mechanical properties are further enhanced, and the production time of composites is shortened. 4 Among the various existing 3-D woven fabrics, 3-D interlock woven fabric [5][6][7] and especially, the 3-D layerto-layer angle-interlock woven fabric (LLAIWF) can provide a relative good compromise between raw material consumption and manufacturing costs. [8][9][10] The structure of 3-D LLAIWF is very ingenious, and two layers of weft yarns are joined by weaving of the warp yarns, as shown in Figure 1.…”

In-plane shear of nanoprepreg/nanostitched three-dimensional carbon/epoxy multiwalled carbon nanotubes composites

“…Sun et al explained that the preform architecture, preform areal density and fiber linear density were critical parameters for enhancing the shear properties of the 3D preforms. 24 The in-plane shear (trellis) resistance of glass/polypropylene fabrics in thermostamping process came from friction and fiber interlacement in that pressure was exerted in the fiber to fiber regions. 25 Liang et al claimed that shear failure in biaxial woven carbon/epoxy composite was mainly caused by fiber debonding and scissoring which made the fibers rotate to the loading axis and bear the tension load.…”

Three-dimensional nanoprepreg and nanostitched aramid/phenolic multiwall carbon nanotubes composites: Experimental determination of in-plane shear

“…16 It was demonstrated that densely stitched multiaxis noncrimp fabric preform showed higher shear force compared to the lightly stitched preform. 17,18 Sun et al 19 explained that the preform architecture, preform areal density, and fiber linear density were sensitive parameters for enhancing the shear properties of the 3D preforms.…”