Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (09): 27-32.doi: 10.13475/j.fzxb.20190900806

• Textile Engineering • Previous Articles     Next Articles

Finite element simulation of cotton serrated ginning state based on cottonseed modeling

HU Wen1, WANG Di1, CHEN Xiaochuan1(), WANG Jun2, LI Yong3   

  1. 1. College of Mechanical Engineering, Donghua University, Shanghai 201620, China
    2. College of Textiles, Donghua University, Shanghai 201620, China
    3. College of Mechanical and Electronic Engineering, Tarim University,Alar, Xinjiang 843300, China
  • Received:2019-09-02 Revised:2020-05-15 Online:2020-09-15 Published:2020-09-25
  • Contact: CHEN Xiaochuan E-mail:xcchen@dhu.edu.cn

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Abstract:

In order to analyze the stress state of seed cotton in serrated ginning process and improve the quality of lint cotton, a new model of seeded cotton was proposed in this paper based on the existing model of seeded cotton and the fiber network configuration in the actual seeded cotton. The bundled fibers were simulated to have a circular cross-section throughout the length of the fiber along the axis. On the basis of the model, ANSYS Workbench was used to simulate the ginning process, and the influence of different sawtooth speed and cottonseed density on the ginning process was analyzed. It can be seen from the results that the greater the is sawtooth speed, the more severe is the impact of the cotton fiber, but higher sawtooth speed is prone to causing damages to the cotton fiber. The effect of sawtooth ginning is most obvious when the cotton seed density is 580 kg/m3. The error between the experimental and the simulated values is small, which shows the rationality of the model.

Key words: serrated ginning, cotton fiber, cottonseed, finite element model, ANSYS Workbench

CLC Number: 

  • TS113

Fig.1

Distribution of cotton fibers (×20)"

Fig.2

Three-dimensional view of cotton model containing cottonseed"

Tab.1

Cotton seed measurement results"

类别 最大荷重/N 压缩强度/MPa 弹性模量/MPa 最大压缩量/mm
最大值 71.470 2.233 14.047 2.386
最小值 21.542 0.673 6.694 1.329
平均值 55.865 1.746 11.071 1.975

Tab.2

Material parameter"

类别 弹性模量/MPa 泊松比 密度/(kg·m-3)
锯齿 207 000 0.29 7 850
棉朵 2 400 0.40 400
棉籽 11 0.33 500

Fig.3

Stress nephogram(a)and strain nephogram(b) of cotton"

Fig.4

Ginning experiment device"

Fig.5

Reaction force on lower surface of sawtooth"

Tab.3

Maximum stress and strain values at different sawtooth speeds"

滚筒转速/(r·min-1) 最大应力/MPa 最大应变
435 345.97 0.935
507 392.49 1.009
580 458.29 1.134
625 484.20 1.224
725 494.22 1.325

Tab.4

Maximum stress and strain values at different seed densities"

棉籽密度/(kg·m-3) 最大应力/MPa 最大应变
500 345.97 0.954
520 341.54 0.960
540 338.13 0.935
560 347.34 0.952
580 358.66 0.975

Fig.6

Structure diagram of three cotton model. (a)Laminated board cotton model;(b)Three-dimensional woven cotton model;(c)Model of cotton with cotton seeds"

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