Structural Analysis of a Two-dimensional Braided Fabric

Zhang, Qinling; Beale, David G.; Adanur, Sabit; Broughton, R. M.; Walker, Robert P.

doi:10.1080/00405009708658528

Cited by 37 publications

(33 citation statements)

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“…When the braid angle is increased from 45º to 55 º, the braid crimp increased by 79% for the diamond braid and 52% for the regular braid. This increase in braid crimp with an increase in braid angle is thought to have caused by the increase in braid density, which increases as more tows are deposited per unit length [7]. The effect of braid topology on braid crimp is found to be significant for 30º and 55º braid angles, where a decrease of 18% in braid crimp for 30º braid angle and a further decrease of 14% for 55º braid angle is observed when the topology is varied from diamond to regular.…”

Section: Materials and Manufacturingmentioning

confidence: 73%

“…Moreover, carbon-steel, which is the most widely used material for tensile armour wires, is more prone to environmental degradation (e.g. corrosion, hydrogen sulphide induced stress cracking [7]), and thus the type of carbon-steel to be used depends upon the service environment and conditions. Recent works [8][9][10][11] have shown great potential for carbon fibre thermoplastic and thermoset matrix composites (similar dimensions to metallic wires) in replacing metallic tensile and hoop armours.…”

Section: Introductionmentioning

confidence: 99%

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Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Gautam

Katnam

Potluri

et al. 2017

Composite Structures

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Please cite this article as: Gautam, M., Katnam, K.B., Potluri, P., Jha, V., Latto, J., Dodds, N., Hybrid Composite Tensile Armour Wires in Flexible Risers: A Multi-scale Model, Composite Structures (2016), doi: http://dx.doi.org/ 10. 1016/j.compstruct.2016.11.090 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. comprising of hexagonally packed polymer composite rods with uni-directional fibres and an over-braided (i.e. bi-axial braid with high performance fibres) sleeve. These hybrid composite wires offer opportunities to tailor their mechanical properties by varying the geometrical (e.g. rod diameter, packing) and processing parameters (e.g. material selection, braid pattern) involved. In order to understand the mechanical behaviour of these hybrid composite armour wires, this paper presents a multi-scale model developed by using a combined analytical-computational approach. The multi-scale model is developed to predict the torsional and flexural behaviour of the hybrid composite wires; and the role of over-braid structural parameters, pretension and internal friction are investigated. The behaviour of the multiscale model is found to be in good agreement with the experimentally observed behaviour. After validating the multi-scale model with the experimental data available for specific configurations, parametric studies are conducted on the torsional and flexural behaviour of the hybrid composite wires to study the role of internal friction between un-bonded components and the braid tow tension in the over-braided sleeves.

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Section: Materials and Manufacturingmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Gautam

Katnam

Potluri

et al. 2017

Composite Structures

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“…Hence they concluded that the cover factor is directly related to the fabric width as a single independent variable. When the yarn cannot be considered as a flat strip but must instead be considered to have a circular cross-section [14]. Most of these studies and many others successfully developed models for braided structures and made attempts to explain the structural deformation in circular braids.…”

Section: Introductionmentioning

confidence: 99%

“…They further reported that the cover factor of a braided structure is a function of braid angle and diameter and maintains a constant helical length between its tensile and compressive jammed states. According to Zhang et al [14] a stable jammed slate with maximum crimp is found to exist when the braid angle is 45 o and the helical length is a minimum. When the braid diameter is held constant by braiding on a constant-diameter mandrel, the cover factor is increased by decreasing the helical length or increasing the braid angle.…”

Section: Introductionmentioning

confidence: 99%

“…Zheng [13], while studying the micro-structure of braids, established that the pitch length decreased with the braiding angle and numbers of yarns increased. Zhang et al [14] performed a study on a 2D-braid model and established that the cover factor of a fabric braided on a particular braider depends on three variables: braid angle, helical length, and braid diameter. They further reported that the cover factor of a braided structure is a function of braid angle and diameter and maintains a constant helical length between its tensile and compressive jammed states.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of parameters influencing the jamming effect in circular braids

Ochola¹,

Malengier²,

Githaiga³

et al. 2016

WIT Transactions on the Built Environment

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Circular braids are tubular fabrics constructed using a set of helically winding yarns in a circular clockwise and counter-clockwise direction. Circular braided structures exhibit the behavior of rearranging on extension along the longitudinal axis. In this paper, a 3D model of a circular braided structure was developed using generic python, and rendered on ABAQUS ® . A uniaxial tension was induced to the structure at different load values and the extension of the model analysed before and after the jamming state. The models were validated using experimental data and linear regression analysis to study the force-extension relationship during structural deformations in a braided structure. A linear regression model of the relationship between the peak force (y) and the tensile extension (x 1 was developed using linear regression at 95% confidence level. The multiple correlation coefficients (R) indicating a measure of the quality of the prediction of the dependent variable was established as 0.896, for the model, this indicates a good level of prediction. The R 2 value (also called the coefficient of determination) was 0.803, this was the proportion of variance in the dependent variable that could be explained by the independent variables (technically, it is the proportion of variation accounted for by the regression model above and beyond the mean model). Therefore in this model the independent variables explained 80.3% of the variability of our dependent variable, maximum load (y). The extension (x 1 ) of the braided structure was found to have a significant impact on the model.

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Knot‐Architectured Fabric Actuators Based on Shape Memory Fibers

Zhang

Mahato

et al. 2022

Adv Funct Materials

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Due to recent progress on wearable robotics, developing high‐performance fabric and textile actuators to be integrated with various soft electronic devices is urgently needed and remains a challenging issue. Here, a novel knot‐architectured fabric actuator (KAFA), showing superior features such as self‐locking crossing, mechanical robustness, facile fabrication at very low cost, high force generation, and large actuation strain, is reported. The actuation principle of KAFA is based on the shape recovery of constituent nitinol fibers that can restore the memorized curvature in the knotted architectures. Further, the KAFA can be conveniently operated by Joule heating, resulting in reliable actuation due to its seamlessly conductive circuit network. In addition, the KAFA shows exceptionally high force, up to 1373 times its own weight and around 30% actuation strain. The newly developed fabric actuators are applied to a wearable actuation device to lift weighty luggage and an adaptive controllable surface to grip spiky, irregular, fragile, and slippery objects. These applications demonstrate the wide potential of KAFAs for future wearable robotic products such as rehabilitative devices and powered exoskeletons.

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Structural Analysis of a Two-dimensional Braided Fabric

Cited by 37 publications

References 1 publication

Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Hybrid composite tensile armour wires in flexible risers: A multi-scale model

Analysis of parameters influencing the jamming effect in circular braids

Knot‐Architectured Fabric Actuators Based on Shape Memory Fibers

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