scholarly journals Mathematical Model Predicting the Heat and Power Dissipated in an Electro-Conductive Contact in a Hybrid Woven Fabric

2020 ◽  
Vol 20 (2) ◽  
pp. 133-139
Author(s):  
Carla Hertleer ◽  
Jeroen Meul ◽  
Gilbert De Mey ◽  
Simona Vasile ◽  
Sheilla A. Odhiambo ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Contact Resistance ◽  
Electrical Current ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Weft Direction ◽  
Flow Through ◽  
Metal Oxide Varistor ◽  
Crossing Point ◽  
Hybrid Fabric

AbstractElectro-conductive (EC) yarns can be woven into a hybrid fabric to enable electrical current to flow through the fabric from one component A to another component B. These hybrid fabrics form the bases of woven e-textiles. However, at the crossing point of an EC yarn in warp and in weft direction, there is a contact resistance and thus generation of heat may occur in this area. Both phenomena are inseparable: if the contact resistance in the EC contact increases, the generated heat will increase as well. Predicting this electrical and thermal behavior of EC contacts in hybrid woven fabrics with stainless steel yarns is possible with a mathematical model based on the behavior of a metal oxide varistor (MOV). This paper will discuss in detail how this can be achieved.

Mathematical model to predict vertical wicking behaviour. Part II: flow through woven fabric

2011 ◽  
Vol 102 (11) ◽  
pp. 971-981 ◽  
Author(s):  
Brojeswari Das ◽  
Apurba Das ◽  
Vijay K. Kothari ◽  
Raul Fangueiro
Keyword(s):  
Mathematical Model ◽  
Woven Fabric ◽  
Vertical Wicking ◽  
Flow Through

scholarly journals Study of the Contact Resistance of Interlaced Stainless Steel Yarns Embedded in Hybrid Woven Fabrics

2017 ◽  
Vol 17 (2) ◽  
pp. 170-176 ◽  
Author(s):  
Simona Vasile ◽  
Frank Deruck ◽  
Carla Hertleer ◽  
Alexandra De Raeve ◽  
Thomas Ellegiers ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Contact Resistance ◽  
Significant Influence ◽  
Statistical Models ◽  
Electrical Resistance ◽  
Contact Point ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Conductive Yarns ◽  
Weave Pattern

Abstract The contact resistance of two interlacing electro-conductive yarns embedded in a hybrid woven fabric will constitute a problem for electro-conductive textiles under certain circumstances. A high contact resistance can induce hotspots, while a variable contact resistance may cause malfunctioning of the components that are interconnected by the electro-conductive yarns. Moreover, the contact robustness should be preserved over time and various treatments such as washing or abrading should not alter the functioning of the electro-conductive textiles. The electrical resistance developed in the contact point of two interlacing electro-conductive yarns is the result of various factors. The influence of diameter of the electro-conductive stainless steel yarns, the weave pattern, the weft density, and the abrasion on the contact resistance was investigated. Hybrid polyester fabrics were produced according to the design of experiments (DoE) and statistical models were found that describe the variation of the contact resistance with the selected input parameters. It was concluded that the diameter of the stainless steel warp and weft yarns has a statistically significant influence on the contact resistance regardless of the weave. Weft density had a significant influence on the contact resistance but only in case of the twill fabrics. Abrasion led to an increase in contact resistance regardless of the weave pattern and the type of stainless steel yarn that was used. Finally, a combination of parameters that leads to plain and twill fabrics with low contact resistance and robust contacts is recommended.

scholarly journals Air, moisture and thermal comfort properties of woven fabrics from selected yarns

2018 ◽  
Vol 69 (03) ◽  
pp. 177-182
Author(s):  
ZAHRA QURBAT ◽  
MANGAT ASIF ELAHI ◽  
FRAZ AHMAD ◽  
HUSSAIN SAJID ◽  
ABBAS MUDASSAR ◽  
...  
Keyword(s):  
Water Vapour ◽  
Air Permeability ◽  
Woven Fabrics ◽  
Water Vapour Permeability ◽  
Woven Fabric ◽  
Vapour Permeability ◽  
Weft Direction ◽  
Wetting Time ◽  
Thermal Comfort Properties ◽  
Thermal Absorptivity

Air and moisture transport properties of plain woven fabric made from 20sNec cotton in warp and 20sNec pure yarns of tencel, modal, pro-modal, bamboo, polyester and cotton yarn inweft direction are studied. Major characteristics added for this study include water vapour permeability, air permeability, wettingtime and wicking speed. In comparison of six different samples of variously composed materials in weft direction, the air permeability of tencel was minimum and polyester was maximum, whereas the reverse results were observed for both the samples in case of water vapour permeability. Among the blends with cotton, thermal conductivity of bamboo and thermal absorptivity of polyester was found maximum whereas the minimum thermal resistance was observed for pro modal yarn in weft. Similar pattern was observed in spreading speed and wetting time of the polyester when observed from either side top or bottom. Air and moisture comfort properties of bamboo and pro modal, having nearly similar values are suggested to be used in garments used for golf players

scholarly journals The Study of Process and Characteristics of Woven Fabric from Plant Fibers of Lidah Mertua (Sansevieria trifasciata P.)

2019 ◽  
Vol 7 (2) ◽  
pp. 207-220 ◽  
Author(s):  
Lisa Oktavia Br Napitupulu ◽  
Asri Widyasanti ◽  
Ahmad Thoriq ◽  
Asep Yusuf
Keyword(s):  
Tensile Strength ◽  
Textile Industry ◽  
Natural Fibers ◽  
Woven Fabrics ◽  
Raw Material ◽  
Woven Fabric ◽  
Plant Fibers ◽  
Weft Direction ◽  
A Value ◽  
Descriptive Method

Sansevieria or known as tongue-in-law plant is an ornamental plant that is quite popular in Indonesia. This plant is very easily cultivated, easy to grow in areas with less water and sunlight. This plant contains potential natural fibers used as raw material requirements for textile industry, specifically in fabric making. The aims of this research were to determine the production process consisting and analyzing the characteristics of woven fabrics from the leaves of the tongue-in-law plant. The method of fibers extraction used the mechanical decortication process and making woven fabric is done using ATBM. The research method used is descriptive method. Based on the results of the study, it is known that the woven cloth of tongue-in-law has color characteristics with a value of L* 69.73; a* 1.86; b* 17,38; H 83,88. Besides that, it is known the mechanical characteristics of the tongue-in-law woven fabric, the tensile strength of the fabric, the weft  direction of 46.05 kg and the warp direction of 19.96 kg; weft direction stretch 22% and stretch direction of the warp of 55.20%; weft direction tear strength 19.17% and wrap direction 4.60%; and air penetrating power 116.2 cm3/cm2/s.The value of the tensile strength of the tongue-in-law woven fabric produced in the warp direction does not meet the standards of SNI 08-0056-2006 woven fabric quality requirements for suit.Therefore, woven fabric produced is intended as a craft material.

Multi-layer pattern creation for seamless front female body armor panel using angle-interlock woven fabrics

2016 ◽  
Vol 87 (3) ◽  
pp. 381-386 ◽  
Author(s):  
D Yang ◽  
X Chen
Keyword(s):  
Mathematical Model ◽  
Female Body ◽  
Woven Fabrics ◽  
The Body ◽  
Body Armor ◽  
Woven Fabric ◽  
Front Panel ◽  
Ballistic Performance ◽  
Novel Approach ◽  
The Relationship

Angle-interlock woven fabric offers an option for making female body armor as it can form integrally the required dome shapes because of its extraordinary moldability and satisfactory ballistic performance. A mathematical model is created to determine the pattern geometry for the front panel of female body armor, and the front panel can be quickly created using this mathematical model. However, the body armor is multi-layer, which indicates that the relationship between the thickness of the fabric and the pattern block projection for different layers of fabric needs to be investigated, in order to create the whole panel, to improve this novel approach for making seamless female body armor with satisfactory ballistic performance.

The Effects of Jacquard Woven Fabric Constructional Parameters and Elastane Yarn on Bending Rigidity

2015 ◽  
Vol 10 (2) ◽  
pp. 155892501501000
Author(s):  
Gülcan Süle
Keyword(s):  
Woven Fabrics ◽  
Experimental Results ◽  
Woven Fabric ◽  
Weft Yarn ◽  
Bending Rigidity ◽  
Warp Yarn ◽  
Weft Direction ◽  
Bending Property ◽  
Yarn Count ◽  
Overall Bending

In this research, the bending property of jacquard woven fabrics and the effects of weft density, weft yarn count, weave, and Lycra inclusion in weft yarn on this property were investigated. Viscose filament warp yarn and polyester and polyester/Lycra weft yarns were used for weaving fabrics, and 4/1 and 7/1 satin weaves with the same jacquard design were used as the ground weave. Experimental results show that the bending rigidities of the fabrics in the warp directions increase as the weft density increases and the weft yarn gets thicker. The bending rigidities of the fabrics woven with a 4/1 satin weave in the warp direction are higher compared to the bending rigidities of the fabrics woven with a 7/1 satin weave in the same direction. Similar to the bending rigidities in the warp direction, as the weft density increases and the weft yarn gets thicker, the bending rigidities of the fabrics in the weft directions increase. When the weft yarn includes Lycra, the bending rigidity values of the fabric decrease in the weft direction. Additionally, similar to the bending rigidity in the warp direction, the jacquard woven fabrics with a 4/1 satin weave have a higher bending rigidity in the weft direction compared to the jacquard woven fabrics with a 7/1 satin weave. It was observed that when the weft density increases, the overall bending rigidities of the fabrics increase. Despite fabrics woven with a polyester/Lycra weft yarn having a thicker weft yarn and heavier weight with the same weft density and weave compared to fabrics woven with a polyester weft yarn, the bending rigidity values in the weft direction have a lower overall fabric bending rigidity.

Impact of Anisotropy on the Elastic Modulus of Basic Woven Fabric Structure

2015 ◽  
Vol 732 ◽  
pp. 123-126
Author(s):  
Diana Šimić Penava ◽  
Željko Penava ◽  
Željko Knezić
Keyword(s):  
Elastic Modulus ◽  
Tensile Force ◽  
Woven Fabrics ◽  
Raw Material ◽  
Woven Fabric ◽  
Weft Direction ◽  
Fabric Structure ◽  
Tensile Forces ◽  
Extension Direction ◽  
Good Agreement

Anisotropy is the characteristic which is typical for most materials, especially woven fabrics. Influence of direction of tensile force action on the properties of the fabric is big and frequently tested. The woven fabric can be defined as orthogonal elastomer. The values of elastic modulus of woven fabrics for different angles of extension direction were analyzed. Three types of fabric samples of different weaves (plain, twill, sateen) and the same raw material composition were tested under tensile forces in seven directions oriented with 15° increment with respect to the weft direction. Elastic modulus of woven fabrics was determined experimentally in the laboratory. Based on the experimentally obtained values, theoretically calculated elastic modulus for arbitrarily chosen fabric directions was calculated. A good agreement between experimental results and the calculated obtained values of the elastic modulus was shown, so the theoretical equations can be used with high accuracy to calculate the elastic modulus of the fabric in various directions. Therefore, the measurements need to be implemented when the tensile force acting on the fabric only in the warp (90°), weft (0°) and at angle of 45°.

scholarly journals In-Plane Permeability Measurement of Biaxial Woven Fabrics by 2D-Radial Flow Method

2021 ◽  
Vol 28 (1) ◽  
pp. 153-159
Author(s):  
Muhammad Azhar Ali Khan
Keyword(s):  
Radial Flow ◽  
Constant Pressure ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Flow Method ◽  
Wide Range ◽  
Filling Time ◽  
Flow Through ◽  
Weaving Pattern

AbstractThe accurate characterization of fabrics used in vacuum assisted resin transfer molding (VARTM) is essential in order to model the flow through these porous preforms. A wide range of these fabrics are available for composite manufacturing through VARTM and thus brings about a need to opt a methodology which characterizes the in-plane permeability of these preforms. These permeability values can then be used in simulations that can track the flow front progression and mold filling time. This work identifies the permeability of an E-glass fabric based on Darcy's law. Woven fabric having areal weight of 200 grams per square meter (gsm) is under consideration. The experiments are conducted at constant pressure conditions using 2D Radial flow method. Stereo microscopy of the preform material is done for detailed study of the weaving pattern. It is concluded that plain woven fabric exhibits anisotropic behavior when tested for in-plane permeability. Permeability is found to be higher in a direction which offers more interspacing between adjacent fibers threads causing more resin to flow in this direction.

An investigation of the effects of weave types on surface roughness of woven fabric

2021 ◽  
pp. 004051752110106
Author(s):  
Kura A Beyene ◽  
Degu M Kumelachew
Keyword(s):  
Surface Roughness ◽  
Confidence Interval ◽  
Pairwise Comparison ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Weft Direction ◽  
Air Jet ◽  
Handling Characteristics ◽  
Warp Tension ◽  
Air Jet Loom

The fabrics intended for clothing have more emphasis on their appearance and handling characteristics such as luster, smoothness or roughness, stiffness or limpness, and draping qualities. Nowadays, evaluating fabric touch can be of great interest in the industry to match the quality needs of the consumer and the parameters for the manufacturing process. Throughout this study, the effect of weave types on the surface roughness of cotton woven fabric was investigated and analyzed. Three different weave types namely, plain 1/1, twill 1/3, and sateen 8/3 were investigated. The fabric parameters were 27*20Ne (warp/weft) count of yarn, 38*18 (EPC [Ends per Centimeters]/PPC [Picks per Centimeters]) thread density, and 710 CN/TEX (Cent-newton per Tex) with warp tension was produced by air-jet loom. The findings of this study revealed that the surface roughness values of all the fabrics increased regularly on moving from plain 1/1 weave to sateen 8/3 weave. But, the surface roughness of fabric in the weft direction is higher than in the warp direction. The weave type is statistically significant at a confidence interval of 95% and can effectively be used to describe the surface roughness for both warp and weft direction of woven fabrics. The pairwise comparison reveals that it is statistically significant for weave types in the warp and weft direction of the fabrics. This investigation and analysis of weave types on surface roughness of cotton woven fabrics help textile technologies and manufacturers to consider the weave types during the production of fabrics for different end applications.

Geometrical analysis of bi-stretch auxetic woven fabric based on re-entrant hexagonal geometry

2019 ◽  
Vol 89 (21-22) ◽  
pp. 4476-4490 ◽  
Author(s):  
Adeel Zulifqar ◽  
Hong Hu
Keyword(s):  
Tensile Tests ◽  
Geometrical Model ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Geometrical Parameters ◽  
Empirical Equations ◽  
Geometrical Analysis ◽  
Weft Direction ◽  
Semi Empirical ◽  
The Relationship

This paper reports a study on the geometrical analysis of bi-stretch auxetic woven fabric based on a re-entrant hexagonal geometry. The fabric was first designed and fabricated. Then, the fabric was subjected to tensile tests, and changes in the geometry of the fabric structural unit cell at different tensile strains were observed when stretched either in the warp or weft direction. Based on the observations, a geometrical model was proposed for each stretch direction and used to establish the relationship between Poisson’s ratio and tensile strain. The semi-empirical equations for both stretch directions were finally obtained by fitting geometrical parameters with experimental results. It is expected that the semi-empirical equations obtained in this study could be used in the design and prediction of the auxetic behavior of bi-stretch auxetic woven fabrics made with the same type of materials and geometry, but with different values of geometrical parameters.

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