Knitted fabric composites

Duhovic, Miro; Bhattacharyya, Debes

doi:10.1533/9780857090621.2.193

Cited by 12 publications

(4 citation statements)

References 18 publications

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“…12,13 The space between the knit loops is significantly influenced by the actuation force because the rib knit is relatively three-dimensional compared with the plain knit, in which the knit and purl alternately cross each other in the vertical direction. 29 The findings of this study reveal that the actuation force of the rib knit is more noticeably affected by the knit gauge compared to the plain knit, owing to their inherent characteristics. These insights could offer valuable implications for researchers involved in the development of knitted actuators employing smart materials like SMA.…”

Section: Discussionmentioning

confidence: 76%

“…A plain knit, in which the shape of the loop comprised a knit or purl that is identical on one side, can roll up by itself and influence the length-wise and width-wise characteristics of the knitted fabric. 29,30 Moreover, the unique characteristics of the knits should be considered when designing the SMA wire as a knit structure and they should be manufactured at a loop ratio of at most 1 × 3 to minimize the bistable characteristics during operation. Furthermore, we suggest the use of knit modules with a 1 × 2 ratio, a large bending angle and a constant wale to develop wearable products because of the asymmetric actuation motion between the top and middle of the knitted module.…”

Section: Discussionmentioning

confidence: 99%

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Mapping actuating performance of knitted shape memory alloys and proposing design guidelines for assistive wearable applications

Lee,

Jung,

Park

2023

Journal of Industrial Textiles

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The purpose of this study was to map the actuating performance of knitted SMA modules, and propose design guidelines for developing optimal SMA actuators, to be used in wearable assistive devices, suitable to be worn on the human body. To validate the findings of this study in the real world, we adopted an assistive rehabilitation glove for hemiplegic patients as a particular design case. To characterize the bending and contractile properties of knitted SMA modules, we conducted actuating performance tests with 720 knitted SMA samples under various conditions in actuation force, bending angle, contraction, electric power, and surface temperature. Based on the results, we proposed design guidelines by aligning the actuating performance of knitted SMA modules with joint mobility of hemiplegic patients for a smart rehabilitation glove. We anticipate that the outcomes of this study will serve as a practical yardstick for researchers in determining the desired actuating performance of a knitted SMA module that can support and assist the joint motion of the human body, when designing a wearable assistive device.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Mapping actuating performance of knitted shape memory alloys and proposing design guidelines for assistive wearable applications

Lee,

Jung,

Park

2023

Journal of Industrial Textiles

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“…Therefore, a prepreg can be defined as a preform braided structure of the reinforcement used as a composite (Potluri and Nawaz, 2011). Composite prepregs reduce the risk of poor impregnation quality by ensuring that the amount of each constituent is correct and interacts well (Duhovic and Bhattacharyya, 2011). It will also reduce the risk of possible composite processing defects, such as applying complex geometries like curvature indentations (Wang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Ramie Fiber-Reinforced Polylactic-Acid Prepreg: Fabrication and Characterization of Unidirectional and Bidirectional Laminates

Soemardi,

Polit,

Salsabila

et al. 2023

IJTech

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The fabrication of a natural prepreg with poly-lactic acid (PLA) matrix and ramie fiber reinforcement was engineered on a laboratory scale by impregnating the unidirectional and bidirectional ramie fiber with PLA matrix solvent on a glass die. The obtained composite prepreg has been stored at a very low temperature to maximize its shelf life. Tensile and biodegradability tests of the composite laminates prepared by the hot-pressing method have also been conducted. Tensile test results show that the freezer-stored bidirectional 0/90° prepreg laminate specimen has the highest tensile strength of 71.44 MPa with a modulus of 2.70 GPa on average. Meanwhile, the unstored bidirectional 0/90° prepreg laminate specimen has the highest level of elasticity, with a modulus of 1.29 GPa on average. The biodegradability test shows the decomposition process of the composite laminate under actual composting conditions. Microscopic observation of the damaged specimen results shows good adhesion between the PLA matrix and ramie fiber and the decomposition of the biodegradability test samples.

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“…Knitted structures possess superior flexibility, 41-44 having a lower modulus of elasticity as compared to its woven coun-terparts. 45,46 The modulus of elasticity is an indication of the relationship between stress and strain in the deformation of a solid body.…”

Section: Introductionmentioning

confidence: 99%

Progress on the Fabrication of Smart Textiles Based on Soft Strain Sensors

Raji¹,

Miao²,

Wan³

et al. 2019

AATCC Journal of Research

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The focus of this study is on strain sensing research and applications in smart textiles. Strain sensing is the measurement of fabric deformation by embedding a strain-sensitive material in it and subjecting it to stress. This paper presents an extensive classification of knitted textile strain sensors. Salient knitted strain sensor production parameters, such as conductive yarn choice, fabric structure, fabric structure deformation, and its relationship to strain signal extraction are discussed. The study concludes that producing yarn-based soft strain sensors for smart textile applications is viable. However, sensitive yarns with the right conductivity, count, and structural configuration are often unavailable. Work remains in the areas of efficient fabric deformation, signal extraction methods, development of sensor nodes, and robust experimental testing systems.

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Knitted fabric composites

Cited by 12 publications

References 18 publications

Mapping actuating performance of knitted shape memory alloys and proposing design guidelines for assistive wearable applications

Mapping actuating performance of knitted shape memory alloys and proposing design guidelines for assistive wearable applications

Ramie Fiber-Reinforced Polylactic-Acid Prepreg: Fabrication and Characterization of Unidirectional and Bidirectional Laminates

Progress on the Fabrication of Smart Textiles Based on Soft Strain Sensors

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