Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (02): 107-112.doi: 10.13475/j.fzxb.20200706106

• Textile Engineering • Previous Articles     Next Articles

Simulation on tensile properties of tubular weft knitted fabrics based on ABAQUS

SUN Yabo1, LI Lijun2,3, MA Chongqi1(), WU Zhaonan1, QIN Yu1   

  1. 1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
    2. School of Automation, Southeast University, Nanjing, Jiangsu 210096, China
    3. Ninbo Cixing Co., Ltd., Ningbo, Zhejiang 315336, China
  • Received:2020-07-22 Revised:2020-11-02 Online:2021-02-15 Published:2021-02-23
  • Contact: MA Chongqi E-mail:tjmcq@tjpu.edu.cn

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Abstract:

In order to better understand the tensile deformation capability of tubular weft knitted fabrics, a three-dimensional weft knitted fabric loop model and a tubular weft knitted fabric model were established using a three-dimensional modeling software Rhino, on the basis of the measured fabric structure parameters. The tensile properties of the fabric were simulated on unit loop level and tubular fabric level using the finite element analysis software ABAQUS. Numerical simulations of fabric tensile process were studied and corresponding experiment verification was carried out. Deformation and stress distribution of yarns in the stretching process of knitted fabrics were analyzed and discussed. The results indicate that when fabrics are stretched along the length direction, the finite element analysis results of its deformation and stress change are described accurately compared to the experimental results. Moreover, the difference in stress and strain values between the simulated and the experimental results is about 8%, indicating that the numerical simulation is feasible and effective.

Key words: tubular weft knitted fabric, geometric model of knitted fabric, tensile mechanical property, finite element simulation

CLC Number: 

  • TS101.8

Fig.1

Coil type value point. (a) Front view of coil center line;(b)Left view of coil center line"

Tab.1

Coil type value point coordinates"

型值点 坐标 型值点 坐标
n1 (-2a, 0, r) n6 (a+0.5c, b+l, 0)
n2 (0.5c-a, b, 0) n7 (a, b+0.5l,-r)
n3 (-a, b+0.5l, -r) n8 (a-0.5c, b, 0)
n4 (-a-0.5c, b+l, 0) n9 (2a, 0, r)
n5 (0, 2b+l, r)

Fig.2

Three-dimensional model of coil"

Fig.3

Tubular knitted fabric model"

Tab.2

Tensile properties parameters of yarns"

密度/
(g·cm-3)		 强力/
cN		 伸长
率/%		 屈服应
力/MPa		 弹性模
量/MPa		 泊松比
0.92 579.80 7.48 19.61 1 829.36 0.20

Fig.4

Unit model load setting"

Fig.5

Stress distribution of unit model during tensile process. (a)Stress distribution when unstretched;(b)Stress distribution in early stage;(c)Stress distribution at end"

Fig.6

Stress distribution of tubular knitted fabric after stretching"

Fig.7

Comparison of fabric stress-strain between simulation and experiment"

Tab.3

Comparison of simulated and experimental results"

应变/% 应力实验值/MPa 应力理论值/MPa 误差/%
5 0.085 0.088 4.01
10 0.261 0.282 7.4
15 0.774 0.798 2.1
20 1.253 1.236 1.3
25 1.830 1.985 7.8
30 2.814 2.997 6.1
35 3.827 3.694 3.6
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