Rheological modeling of tubular weft knitted textiles

Yekrang, Javad; Semnani, Dariush

doi:10.1080/00405000.2017.1396649

Cited by 2 publications

(7 citation statements)

References 8 publications

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“…Therefore, for tubular structures with circumferential expansion and longitudinal strength, it is essential to set the stitch density at an optimum value to have good mechanical properties in both directions. [ 26 ] Besides, the manufacturing parameters, such as gauge size, take‐up setting, yarn tension, also have a considerable influence. At the same time, the fineness, linear density, twist and morphology of the yarn, and their cross‐sectional shape define the micro‐level properties.…”

Section: Textile Technologies For Engineering Hollow Tubular Scaffoldsmentioning

confidence: 99%

“…Yekrang et al engineered a plain weft-knitted tubular structure for esophageal TE, investigating the parameters of the stitch density on the mechanical properties. [26] It was found that an increase in stitch density causes an increase in strength and a decrease in axial deformation. Therefore, for tubular structures with circumferential expansion and longitudinal strength, it is essential to set the stitch density at an optimum value to have good mechanical properties in both directions.…”

Section: Knittingmentioning

confidence: 99%

“…Engineering fibrous architectures entail fiber fabrication and manufacturing textile structures that will mimic the native ECM and provide a favorable environment for cell growth and differentiation. [10] Recent studies used textile technologies, such as electrospinning, [11][12][13][14][15] braiding, [16,17] knitting, [18,19] weaving, [20,21] or a combination [22][23][24][25][26] to fabricate scaffolds of tubular geometries, with an emphasis on the use of electrospinning. However, scaffold engineering was almost consistently neglected with great focus given on cell attachment and material mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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A Review: Textile Technologies for Single and Multi‐Layer Tubular Soft Tissue Engineering

Doersam

Tsigkou

Jones

2022

Adv Materials Technologies

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In addition, it requires a fundamental understanding of the structure and function of the target tissue type.Tubular tissues, such as vascular, respiratory, or intestinal systems supply the body with important nutrients and transport blood, air, food, or fluids. A defect in these tissues can considerably affect the patient's quality of life, for example, the required surgical reconstruction of connecting pathways between two anatomical structures can significantly reduce the patient's mobility. Current treatment strategies for diseased tubular tissues include transplantations of donor organs, autologous tissues, or implantable medical devices to restore tissue function. [2] However, transplants of donor organs or autologous tissue are limited due to availability, donor site morbidity, and risk of disease transmission. [3] Compared to natural body parts, implants have not yet reached the functionality, quality, or longevity (often need replacement after years). [3] Moreover, they must remain in the body for years, and material-specific compatibility problems can cause chronic inflammatory responses, thus limiting their clinical use. Being able to develop tissues outside the body provides a longterm alternative to organ transplantation that could offset the increasing discrepancy between the required number of donor organs needed and availability due to a growing and aging population and the higher life expectancy. [1] Additionally, eliminating the need for time-intensive therapy, for example, immune suppressants, and improving the patient quality of life. [1] Tubular tissues have many unifying structural and biomechanical characteristics despite their different functions. They consist of a multi-layered muscular wall structure of multiple different cell types. The different cell types are embedded in a surrounding environment, the extracellular matrix (ECM). [1] The ECM serves for the spatial organization of the cells and consists of fibrous structures, for example, collagen or elastin, which are proteins that form fiber bundles. [2] Fibrous structures can be found throughout the human body, whether in the architecture and ECM of specific tissue structures, such as arteries, lymphatic vessels, cartilage, or in the fibrous nature of nerves, muscles, ligaments, tendons. [4] A major aim of TE is to mimic the ECM and develop a 3D scaffold that will be seeded with native cells for tissue formation. Current scaffold designs of tubular tissues include foams, gel mattresses, sponges, meshes, and nanofibrous structures. [5] The scaffold serves as a template In cell-free scaffold tissue engineering (TE), an essential prerequisite is the scaffold design to promote cellular activities and tissue formation. The success is greatly dependent upon the nature of the scaffold including the composition, topography, and mechanical performance. Recent TE approaches use textile technologies to create biomimetic and functional scaffolds similar to the extracellular matrix (ECM). The hierarchical architecture of fiber to yarn to fabric a...

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Section: Textile Technologies For Engineering Hollow Tubular Scaffoldsmentioning

confidence: 99%

Section: Knittingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Review: Textile Technologies for Single and Multi‐Layer Tubular Soft Tissue Engineering

Doersam

Tsigkou

Jones

2022

Adv Materials Technologies

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“…Their model did not give a precise result for tensile properties, as compared with experimental test, due to ignoring the friction between loops. Yekrang et al have also modeled the knitted tubular structures by viscoelastic elements [28]. They considered several rheological combinations to investigate the mechanical behavior of the weft knitted tubular structures in the axial and circumferential directions.…”

Section: Introductionmentioning

confidence: 99%

“…Yekrang et al. have also modeled the knitted tubular structures by viscoelastic elements [28]. They considered several rheological combinations to investigate the mechanical behavior of the weft knitted tubular structures in the axial and circumferential directions.…”

Section: Introductionmentioning

confidence: 99%

Simulation and characterization of the mechanical properties of knitted esophageal stents using finite element and mathematical models

Yekrang

Semnani

Seyghlani

2020

Journal of Industrial Textiles

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Esophageal stents are used as a clinical method for the treatment of a wide variety of esophageal diseases. Knitted mesh stents have such advantages as high flexibility and ease of production. In this study, an analytical approach was applied to simulate the weft knitted esophageal stents and to investigate the mechanical behavior of these tubular structures against the axial and circumferential stresses by using finite element (FE) and mathematical models. Then, the mechanical properties of the knitted structures were evaluated while the simulated food bolus was passed through the stent channel. The results demonstrated that the FE model had a good performance in simulating the mechanical properties of the esophageal knitted stents. The error of the prediction performance of the FE models was between (10–16)% and (7–11)% for the longitudinal and circumferential directions, respectively. Simulation of the food bolus passage also demonstrated that the esophageal PGA stent wall could tolerate a 7.96 kPa force and a strain of 65% by food bolus; so, it could mimic the real state of esophagus during its application. This model could be applied to design and investigate the mechanical behavior of the knitted stents in clinical application conditions.

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Rheological modeling of tubular weft knitted textiles

Cited by 2 publications

References 8 publications

A Review: Textile Technologies for Single and Multi‐Layer Tubular Soft Tissue Engineering

A Review: Textile Technologies for Single and Multi‐Layer Tubular Soft Tissue Engineering

Simulation and characterization of the mechanical properties of knitted esophageal stents using finite element and mathematical models

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