Experimental and Numerical Simulation of the Tensile Behaviour of a Biaxial Warp-knitted Composite

Gao, Xiaoping; Yang, Xiaori; Li, Danxi; Li, Yonggui

doi:10.5604/01.3001.0012.5164

Cited by 3 publications

(1 citation statement)

References 20 publications

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“…1. Under a uniform arrangement of the warp fibers, slits are made by discontinuously knitting the weft (Kyosev and Renkens, 2015;Gao et al, 2018). As a result, the rigidity in the warp direction does not change significantly depending on the arrangement and size of the slits, but the rigidity in the weft direction orthogonal to the warp direction can be changed (Mathew et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Optimization of slit density distribution in shoe upper made of warp knitting to optimize the contact pressure

NONOGAWA,

TAKEUCHI,

TAKAHASHI

et al. 2023

Mechanical Engineering Journal

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A method for finding the optimum distribution of the slit density in a shoe upper, such that the contact pressure with the foot approaches an ideal distribution is presented in this paper. In a shoe upper made of warp knitting, slits are made by discontinuously knitting the weft under a uniform arrangement of the warp fiber. In this study, the shoe upper is modeled as an orthotropic hyperelastic body in which the slit density is defined as the design variable for controlling the intermediate density for the maximum and minimum slit densities. Referring to a formulation of a topology optimization problem of the density variation type, an inverse problem for finding the optimum distribution of the slit density is formulated with the objective and constraint cost functions defined by the squared error norm between the actual and ideal contact pressures and the deviation of the rate of the material with the maximum slit density from a limit value, respectively. This problem is solved in the same way as a topology optimization problem. The validity of this method is confirmed by numerical examples using a simple finite element model, which resembles the domain around the big toe.

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Section: Introductionmentioning

confidence: 99%

Optimization of slit density distribution in shoe upper made of warp knitting to optimize the contact pressure

NONOGAWA,

TAKEUCHI,

TAKAHASHI

et al. 2023

Mechanical Engineering Journal

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Experimental and numerical research of temperature on tensile properties of multiaxial warp‐knitted composites

Gao

Yang

2020

Polymer Composites

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A study on tensile behavior of composites reinforced with triaxial and quadriaxial warp-knitted glass fabrics were carried out in 0 , 45 , and 90 directions at temperature of −30 C, 0 C, 20 C, and 40 C. The stress-strain character, normalized strength, normalized modulus, failure strain, and the relationships between strength and temperature were also obtained. The failure mechanism was also analyzed based on the fracture mode and scanning electron microscopy morphology of composites. In addition, to obtain influence related with reinforcement structure, the tensile behavior of the quadriaxial warp-knitted composite was simulated on the basis of unit cell model and compared with the experimental one. Results show that the tensile properties were decreased with the increase of temperature. The ultimate normalized strength of triaxial and quadriaxial warp-knitted composites were decreased by 14.18% and 18.13%. The fracture morphology was consistent with the simulation ones.

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Prediction of tensile behavior of compression therapeutic biomedical materials by mesoscale laid-in loop model

Shi,

Liu,

Wong

et al. 2024

Polymer

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Experimental and Numerical Simulation of the Tensile Behaviour of a Biaxial Warp-knitted Composite

Cited by 3 publications

References 20 publications

Optimization of slit density distribution in shoe upper made of warp knitting to optimize the contact pressure

Optimization of slit density distribution in shoe upper made of warp knitting to optimize the contact pressure

Experimental and numerical research of temperature on tensile properties of multiaxial warp‐knitted composites

Prediction of tensile behavior of compression therapeutic biomedical materials by mesoscale laid-in loop model

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