Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (08): 84-89.doi: 10.13475/j.fzxb.20201206006

• Textile Engineering • Previous Articles     Next Articles

Finite element analysis of braided artificial ligaments of different structures under combined loading

LU Jun1,2, WANG Fujun1,2, LAO Jihong1,2, WANG Lu1,2, LIN Jing1,2()   

  1. 1. College of Textiles, Donghua University, Shanghai 201620, China
    2. Key Laboratory of Textile Science & Technology, Ministry of Education, Donghua University, Shanghai 201620, China
  • Received:2020-12-22 Revised:2021-04-30 Online:2021-08-15 Published:2021-08-24
  • Contact: LIN Jing E-mail:jlin@dhu.edu.cn

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Abstract:

In order to explore the stress distribution and friction loss of braided artificial ligaments of different structures under combined loading conditions in normal gait, finite element analysis method was used for calculation and analysis. According to the spiral trajectory and interweaving structure of the yarn in space, MatLab was used to calculate the discrete coordinate points in space which was then imported into Solidworks to build three-dimensional models. ABAQUS was used to assign material properties, boundary conditions, contact friction properties and calculate finite element analysis. The results show that the finite element simulation curve and the actual test curve had high agreement. When an external load was applied, the stress of the regular braided specimen was evenly distributed on the yarns in the two directions, while the stress of the tri-axial braided specimen was mainly concentrated on the shaft yarn. Moreover, tri-axial braided specimen was needed to resist more friction between the yarns. The research provides a theoretical reference for the optimal design of artificial ligaments.

Key words: artificial ligament, combined loading, three-dimensional model, finite element analysis, stress concentration, medical textiles

CLC Number: 

  • TS101.8

Fig.1

Structure composition of artificial ligament fatigue testing device"

Fig.2

Combined loading testing process"

Fig.3

Three-dimensional models of two braided artificial ligament specimens"

Fig.4

Comparison of finite element simulation curves and test curves of two kinds of specimens"

Tab.1

Comparison of finite element simulation and test results of two kinds of specimens"

试样
编号		 载荷实
验值/N		 载荷模
拟值/N		 相对误
差/%
AL24-0 216.58 212.73 -1.78
AL24-6 509.60 469.65 -7.84

Fig.5

Finite element simulation process of two kinds of specimens"

Fig.6

Stress distribution of yarns of two kinds of specimens"

Fig.7

Average von mises stress values of yarn of two kinds of specimens"

Fig.8

ALLFD curves of two kinds of specimens"

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