Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 45-52.doi: 10.13475/j.fzxb.20180800408

• Textile Engineering • Previous Articles     Next Articles

Micro-structure and properties of multilayer multiaxial woven composites

WANG Xinmiao1,2, CHEN Li1,2(), ZHANG Diantang3, CHEN Dong1,2   

  1. 1. College of Textile Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
    2. Key Laboratory of Advanced Textile Composites, Ministry of Education, Tianjin Polytechnic University, Tianjin 300387, China
    3. Key Laboratory of Eco-Textiles (Jiangnan University), Ministry of Education , Wuxi, Jiangsu 214122, China
  • Received:2018-08-01 Revised:2018-11-16 Online:2019-02-15 Published:2019-02-01
  • Contact: CHEN Li E-mail:chenli@tjpu.edu.cn

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Abstract:

In order to study the tensile property and failure mechanism of multilayer multiaxial woven composites, based on the multilayer multiaxial weaving process and the spatial movement rule of yarn in the structure, the relationship between process parameters and structure parameters were deduced. Two kinds of multilayer multiaxial woven composites of different structures were prepared from carbon fibers and epoxy resin as raw materials by the multilayer multiaxial weaving process and the resin transfer molding composite process. The quasi-static tensile property of the material were measured by universal testing machine and a non-contact all-field stain meter, and was compared with that of three-dimensional orthogonal composite. The results show that the content of bias yarn in the structure has certain influence of the warpwise tensile property of the multilayer multiaxial woven composites. Bias yarn blocks cracks and strain from extending along the warpwise direction to a certain extent, and influences the failure modes of the material to a great extent. All the warps in the warp layer at the fracture of the sample are broken, and some of yarn in the bias yarn layer are not broken, and the tensioned samples are not completely broken.

Key words: multilayer multiaxial woven preform, woven composite, micro-structure, tensile property

CLC Number: 

  • TB332

Tab.1

Structural parameters of multilayer multiaxial woven composites"

试样
编号		 纱线层排列 密度/(根·(10 cm)-1) 纤维体积
含量/%		 实际厚
度/mm
经向 纬向
WB4 90/0/45/-45/90/
-45/45/0/90		 50 50 48.89 6.0
WB2 90/0/90/45/90/
-45/90/0/90		 50 50 49.14 5.5
WB0 90/0/90/0/90/0/
90/0/90		 50 50 49.43 5.0

Fig.1

Specimens of multilayer multiaxial woven composite specimens in 0° direction"

Fig.2

Geometric model of Z-yarn of multilayer multiaxial woven preform"

Fig.3

Geometric models of multilayer multiaxial woven preform and different layers"

Tab.2

Tensile mechanical properties of multilayer multiaxial woven composites"

试样
编号		 方向/
(°)		 拉伸
强力/
kN		 拉伸
强度/
MPa		 弹性
模量/
MPa		 泊松
比		 厚度计
算值/
mm
WB4 0 45.38 302.50 39 427 0.275 5.98
WB2 0 37.13 270.46 41 120 0.210 5.51
WB0 0 70.12 561.00 45 887 0.051 5.05
WB4 90 50.06 333.75 29 087 0.281 5.98
WB2 90 52.50 381.82 34 897 0.157 5.51
WB0 90 80.37 643.00 57 078 0.081 5.05

Fig.4

Stress-strain curves of multilayer multiaxial woven composite specimens. (a) 0° direction; (b) 90° direction"

Fig.5

Experimental surface strain(a) in different strain level and failure specimen(b) of WB4 in 0° direction"

Fig.6

Experimental surface strain (a) in different strain level and failure specimen (b) of WB0 in 0° direction"

Fig.7

Tensile fracture morphologies of 3-D orthogonal woven composites specimens WB0"

Fig.8

Tensile failure morphologies of multilayer multiaxial woven composites in 0° direction"

Fig.9

Tensile failure morphologies of multilayer multiaxial woven composites in 90° direction"

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