Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (12): 57-62.doi: 10.13475/j.fzxb.20190106006

• Textile Engineering • Previous Articles     Next Articles

Bending properties of three-dimensional braided composite T-beam at low temperature

LIU Jun1, LIU Kui1, NING Bo1, SUN Baozhong2, ZHANG Wei2()   

  1. 1. Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200436, China
    2. College of Textiles, Donghua University, Shanghai 201620, China
  • Received:2019-01-29 Revised:2019-07-26 Online:2019-12-15 Published:2019-12-18
  • Contact: ZHANG Wei E-mail:weizhang@dhu.edu.cn

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Abstract:

In order to study the bending properties of three-dimensional (3-D) braided composite T-beam at low temperature so as to design low temperature resistant and bending resistant 3-D braided composite structure, the 3-D braided composite T-beam with different flange heights was fabricated by vacuum assisted resin transfer molding. The MTS 810.23 material testing system in combination with a self-developed low temperature environment testing system was adopted to test the bending properties of the 3-D braided composite T-beam at different temperatures. The results show that the failure load, displacement and energy absorption increase with the decrease of the temperature, and the bending rigidity, failure load and energy absorption increase with the increase of the flange height of the T-beam. The displacement decreases with the increase of the flange height. The failure behavior of 3-D braided composite T-beam changes from yield fracture at high temperature to brittle fracture at low temperature. The failure mode changes from bending failure to shear failure with the increase of height of flange height.

Key words: three-dimensional braided composite, T-beam, low temperature, bending property, brittle fracture, shear failure

CLC Number: 

  • TB332

Fig.1

Braiding process of 3-D braided composite T-beam preform"

Fig.2

3-D braided composite T-beam preform"

Fig.3

3-D braided composite T-beam with different flange height"

Fig.4

Quasi-static bending testing system with low temperature environment system"

Fig.5

Load-displacement curves of 3-D braided composite T-beam at different temperature"

Tab.1

Testing results of 3-D braided composite T-beam at low temperature"

测试温
度/℃		 筋高高
度/mm		 最大载
荷/N		 失效位
移/mm		 吸收能
量/J
20 0 1 337 ± 61 6.07 ± 0.23 3.38 ± 0.16
20 5 3 411 ± 145 4.77 ± 0.19 6.63 ± 0.28
20 10 5 153 ± 218 3.35 ± 0.14 8.92 ± 0.37
-20 0 1 536 ± 69 6.19 ± 0.25 3.95 ± 0.18
-20 5 3 589 ± 155 4.99 ± 0.21 8.22 ± 0.36
-20 10 5 438 ± 224 3.32 ± 0.12 9.64 ± 0.41
-50 0 1 703 ± 77 6.30 ± 0.24 4.66 ± 0.21
-50 5 3 912 ± 162 5.04 ± 0.19 7.96 ± 0.33
-50 10 5 747 ± 238 3.42 ± 0.14 10.74 ± 0.44
-80 0 1 904 ± 85 6.42 ± 0.26 5.31 ± 0.24
-80 5 4 134 ± 183 5.17 ± 0.18 9.01 ± 0.38
-80 10 6 302 ± 276 3.46 ± 0.13 11.14 ± 0.42

Fig.6

Effect of temperature and flange height on bending properties of 3-D braided composite T-beam. (a) Load; (b) Failure displacement; (c) Energy adsorption"

Fig.7

Bending failure morphology of 3-D braided composite T-beam with different flange height at -80 ℃"

Fig.8

Bending failure morphology of 3-D braided composite T-beam with flange height of 10 mm at different low temperature"

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