A general approach to fast prototype the topology of braided structures

Shen, Yifeng; Branscomb, David

doi:10.1016/j.ijengsci.2018.06.006

Cited by 12 publications

(8 citation statements)

References 26 publications

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“…Ning and colleagues 19,20 introduced a modeling method to realize the braided structures with different braiding patterns and braiding elements based on the generalized rose curve which was used to describe the projection curve of braiding strands; besides this method could also be used to realize the braided structures over non-cylindrical prisms. Shen and Branscomb 21 propose a general method to generate 3D representations of braided structures using explicitly expressed formulas.…”

Section: Computer-aided Modeling Of Braided Structuresmentioning

confidence: 99%

Mathematical and geometrical modeling of braided ropes bent over a sheave

Sheng

et al. 2020

Journal of Engineered Fibers and Fabrics

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As soft elements for force transmission, braided fiber ropes play important roles in many fields where the fiber ropes are used bent over sheaves, while the relevant experiments are time-consuming and expensive. Computational simulation is a promising choice for evaluating the performance of fiber ropes when bent over a sheave. This article presents two methods that could be employed to build a model of braided rope bent over a sheave. One is the mathematical method which deduces the exact mathematical equations of braiding curves based on the Frenet–Serret frame. The spatial equations, considering the phase difference of strands in the same direction and the difference of strands’ projection in different directions, are discussed carefully. The final equation of braided strands is confirmed by modeling the braided rope in Maple® 17. The other method, which is inspired by the analysis of braiding movements, is based on the intersection of surfaces of braiding surface and helical surface which are introduced and defined based on the motion analysis of bobbins and take-up roller. The SolidWorks® 2018 is successfully employed to realize the modeling process.

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Section: Computer-aided Modeling Of Braided Structuresmentioning

confidence: 99%

Mathematical and geometrical modeling of braided ropes bent over a sheave

Sheng

et al. 2020

Journal of Engineered Fibers and Fabrics

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“…The braided jacket is critical because it ensures that the cord-preg is both stable and braidable, which makes the rapid manufacturing of O-ACS possible. The O-ACS samples were fabricated by braiding the cord-pregs on a Maypole braiding machine [7,8]. Figure 1 shows the manufacturing of the cord-preg.…”

Section: Sample Preparation and Torsion Testsmentioning

confidence: 99%

“…Open-architecture composite structures (O-ACS) are made of tubular composite lattices by rapid manufacturing. O-ACS are fabricated with the consolidated impregnated yarns, which are both braid-able and stable on a braiding machine [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of joint stiffness on torsional stiffness of open lattice composite structures

Shen¹,

Branscomb²,

Adanur

2019

Journal of Industrial Textiles

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In open lattice composite structures, the lattice components are chemically bonded, which affects the overall properties of the structure. This study examines the effects of chemically bonded joints on the torsional stiffness of tubular lattice composite structures. Tubular open lattice structures, known as the open-architecture composite structures, are manufactured by braiding the impregnated carbon fiber tows. Samples were prepared with no chemically bonded and with epoxy joints using braid angles of 35°, 45°, and 67.5°. A finite element model of the open-architecture composite structures is developed to examine the mechanical behavior under torsion. It is shown that there is a significant difference between the samples with no-bonding joints and samples with epoxy joints in terms of torsional stiffness. Torsional stiffness of the structure is retained at 97%, 96%, and 93% of the theoretical limit for 35°, 45°, and 67.5° braid angles, respectively, when joint stiffness is ten times the component stiffness. Torsional stiffness is only 32%, 22%, and 13% of the theoretical limit for 35°, 45°, and 67.5° braid angles, respectively, when joint stiffness is one-10th of the component stiffness. The epoxy bonding at the intersection achieves 72% of the theoretical torsional stiffness of the “perfect joint” for 45° braid angle when joint stiffness is equal to the component stiffness. The finite element model is validated by experimental results. It can be concluded from the finite element analysis and experimental testing that the stiffness of the bonding joints has significant impact on the overall torsional stiffness of the biaxial composite lattice.

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“…2 Braiding angle and yarn spacing are main parameters of braided preform. 3 Many scholars studied the structure of braided preform usually by means of geometric modeling. Adanur 4 developed a CAD model to describe the geometry of a 3D circular braid both externally and internally.…”

Section: Introductionmentioning

confidence: 99%

Modeling method of irregular cross section annular axis braided preform based on finite element simulation

Wang

Zhang

Shi

et al. 2021

Journal of Engineered Fibers and Fabrics

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The irregular cross section annular axis braided preform is modeled by using finite element simulation instead of geometric modeling. The braiding process is simulated by using a finite element software to obtain the yarn path. And the braided preform is modeled by using nine virtual fibers to form irregular cross section shape of yarn. Meanwhile, a modified vertical braiding machine is used to braid the actual preform, to compare with results from the simulation model. The results show that the simulation model is consistent with the actual braided preform, braiding angle is about 36°, and yarn spacing is about 6 mm. The finite element method can predict the yarn path more accurately without the need of complex analysis and derivation, especially when the irregular mandrel is used for braiding. In addition, the cross-section shape of yarn composed of virtual fibers can be used to achieve a more realistic simulation result. FEM is an efficient simulation method, and can also provide an effective basis in studies of the actual cross-sectional shape of yarn and the properties of its composite reinforcements.

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A general approach to fast prototype the topology of braided structures

Cited by 12 publications

References 26 publications

Mathematical and geometrical modeling of braided ropes bent over a sheave

Mathematical and geometrical modeling of braided ropes bent over a sheave

Effect of joint stiffness on torsional stiffness of open lattice composite structures

Modeling method of irregular cross section annular axis braided preform based on finite element simulation

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