Microscopic Investigation of Quartz Fiber Fabrics: Geometry Model

2011 ◽  
Vol 332-334 ◽  
pp. 791-794
Author(s):  
Yan Lv ◽  
Li Chen ◽  
Fei Sun
Keyword(s):  
Cross Section ◽  
Structural Parameters ◽  
Geometrical Model ◽  
Microscopic Investigation ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Geometrical Parameters ◽  
Sem Image ◽  
Geometry Model ◽  
The Individual

In response to the relationship between perform structural parameters and the composites properties, a newly geometrical modeling of 2D biaxial orthogonal woven fabric was established in this paper. Based on the yarn’s true configuration, the SEM image of the yarn cross-section was taken, geometrical parameters (the individual tow geometry and weaving pattern of the fabrics) are introduced in order to describe the general families of woven fabrics. The tow waviness can be described by combinations between undulated and straight segments and the tow cross-section can be described by lenticular shape. When the geometrical model was used to predict the structural properties of the fabric, the predicted values show good agreement with the measured ones. The geometrical model proposed here is intended as the foundation for further design and analytical of the mechanical properties of the composite materials reinforced with these fabrics.

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.

The effects of the structural parameters of three-dimensional warp interlock woven fabrics with silver-based hybrid yarns on electromagnetic shielding behavior

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1354-1371
Author(s):  
Marzieh Javadi Toghchi ◽  
Carmen Loghin ◽  
Irina Cristian ◽  
Christine Campagne ◽  
Pascal Bruniaux ◽  
...  
Keyword(s):  
Unit Area ◽  
Structural Parameters ◽  
Three Dimensional ◽  
Woven Fabrics ◽  
Electromagnetic Shielding ◽  
Woven Fabric ◽  
Shielding Effectiveness ◽  
Conductive Material ◽  
Conductive Yarns ◽  
Multifilament Yarns

The main objective of the present study was to investigate the increase in the electromagnetic shielding effectiveness (EMSE) of a set of five variants of three-dimensional (3D) warp interlock woven fabrics containing silver multifilament yarns arranged in a 3D orthogonal grid. The EMSE enlargement as a factor of increasing the quantity of the conductive material per unit area was investigated. The quantity of the conductive material per unit area in a 3D woven fabric can be enlarged by increasing either the yarn undulation or the number of conductive yarn systems, while the yarn density and yarn fineness are fixed. Thus, the binding depth of the conductive warp was gradually increased for the first four variants in order to increase the yarn undulation. Alternatively, the conductive weft system was doubled for the last variant with the aim of increasing the quantity of the conductive component. It should be noted that changing the weave structure requires less effort and energy while keeping the same threading of warps in the reed compared to altering the warp density. The EMSE was measured in an anechoic chamber and the shielding was satisfactory for all the variants in the frequency range of 1–6 GHz (19–44 dB). The results revealed that increasing only 7% of the waviness degree of the conductive warps led to 17% EMSE improvement due to increasing of the conductive yarns through the thickness of the variants. Moreover, no upward EMSE was detected for the last variant, despite the fact that the conductive weft system was doubled.

Characterization of the effect of fabric structure on the optical properties of woven fabrics

2019 ◽  
Vol 23 (1) ◽  
pp. 58-70
Author(s):  
Paniz Khosravani ◽  
Nazanin Ezazshahabi ◽  
Masoud Latifi
Keyword(s):  
Optical Properties ◽  
Structural Parameters ◽  
Human Perception ◽  
Comparative Judgment ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Content Type ◽  
Weave Structure ◽  
The Aesthetic ◽  
Fabric Surface

Purpose This paper aims to study the optical properties of woven fabrics. Design/methodology/approach The current study was carried out to objectively evaluate the luster of a group of woven fabrics with different weave structures and weft densities, with the aid of a goniophotometer. The results obtained from the objective luster measurement were validated by a set of pair comparison subjective tests using Thurstone’s law of comparative judgment. Findings The proper correlation with the R2 value of more than 0.96, between subjective and objective tests, confirmed the reliability and accordance of objective results with the human perception of luster. Statistical analysis of the luster results clarified that the effect of fabric structural parameters such as weave structure and weft density are significant at the confidence range of 95 per cent. The highest luster index was achieved for the twill 3/1 weave structure and the lowest luster belonged to the plain pattern. In addition, an increase in the density of the fabric leads to better luster. Moreover, it was concluded that the surface roughness affects the luster. A rise in the roughness value of the woven fabric causes reduction in its luster property. Originality/value Optical properties of woven fabrics, which are mainly attributed through the measurement of luster, are important for qualifying the aesthetic characteristics of the fabrics with various weave structures. Bearing in mind the influence of fabric surface properties on the aesthetic features of cloths, obtaining information in this field is a guide for selecting the suitable fabric for various end uses.

Multi-objective optimization of parametric combination of injected slub yarn for producing knitted and woven fabrics with least abrasive damage

2017 ◽  
Vol 21 (2) ◽  
pp. 111-133 ◽  
Author(s):  
Arunangshu Mukhopadhyay ◽  
Vinay Kumar Midha ◽  
Nemai Chandra Ray
Keyword(s):  
Structural Parameters ◽  
Research Work ◽  
Optimal Solution ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Content Type ◽  
Multi Objective ◽  
Score Analysis ◽  
The Impact ◽  
Slub Yarn

Purpose This study aims to optimize the parametric combination of injected slub yarn to achieve least abrasive damage on fabrics produced from it. Design/methodology/approach Single base injected slub yarn structural parameters, vis-à-vis slub length, slub thickness and slub frequency, were varied during preparation of yarn samples under this research work. A total of 17 yarn samples were produced according to the Box and Bhenken design of the experiment. Subsequently knitted and woven (using injected slub yarns in the weft only) fabric samples were prepared from these yarns. Yarn and fabric samples were abraded with standard instruments to see the impact of yarn structural parameters on abrasive damage of fabric in terms of fabric mass loss and appearance deterioration. From the test results, empirical models relating to slub parameters and fabric abrasion behavior were developed through a backward elimination regression approach. Subsequently, a set of optimal parametric combinations was derived with multi-objective evolutionary algorithms by using MATLAB software. This was followed by ranking all optimal solutions through technique for order preference by similarity to idle solution (TOPSIS) score analysis. Findings The injected slub yarn’s structural parameters have a strong influence on the abrasive damage of knitted and woven fabric. It is seen that the best suitable parametric combination of slub parameters for achieving the least abrasive damage is not the same for knitted and woven fabric. Practical implications The spinner can explore this concept to find out the best suitable parametric combination during pattern making of injected slub yarn through MATLAB solution followed by TOPSIS score analysis based on their priority of criteria level to ensure better abrasion behavior of fabric produced. Originality/value Optimization of parametric combination of injected slub yarns will help to ensure production of fabric with most resistance to abrasion for specific applications. The studies showed that the optimal solution for woven and knitted fabrics is different. The result indicates that in the case of knitted fabric, comparatively lesser slub thickness is found to be suitable for getting better fabric abrasion resistance, whereas in the case of woven fabric, comparatively higher slub thickness is found suitable for the same.

scholarly journals Heat Storage and Release Characteristics of Ceramic-Imbedded Woven Fabric for Emotional Clothing

2019 ◽  
Vol 19 (2) ◽  
pp. 165-172 ◽  
Author(s):  
Hyun Ah Kim ◽  
Seung Jin Kim
Keyword(s):  
Heat Storage ◽  
Light Emission ◽  
Structural Parameters ◽  
Far Infrared ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Thermal Manikin ◽  
Emissive Power ◽  
Pet Fabric ◽  
Process Factors

Abstract This study examined the heat storage and release characteristics of ZrC-imbedded woven fabrics by light emission and thermal manikin experiments. The surface temperature of the ZrC-imbedded fabric was higher than that of the regular PET fabric. Furthermore, the Clo values of both the total and torso of the ZrC-imbedded fabric by the thermal manikin experiment were higher than those of the regular PET fabric, which suggests that the heat release is caused by far infrared rays emitted from the ZrC particles imbedded in the yarns as they receive light. This was confirmed by the higher emissivity and emissive power of the ZrC-imbedded fabric. However, the tactile hand of the ZrC-imbedded fabric needs to be improved by adjusting the structural parameters of the fabric and finishing process factors.

Weaving 3D Fabric with a “中” Shaped Cross-Section

2011 ◽  
Vol 331 ◽  
pp. 202-205
Author(s):  
Yu Tao Chang ◽  
Xiao Ming Qian ◽  
Hai Wen Liu ◽  
Hua Wu Liu
Keyword(s):  
Mechanical Properties ◽  
Cross Section ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Processing Methods ◽  
Reinforcing Material ◽  
Shaped Cross Section ◽  
Made In ◽  
3D Woven Fabrics

3D woven fabric significantly improves the mechanical properties, especially the strength resulting from the between layers connections of yarns Hence, 3D woven fabrics have been widely used as reinforcing material in prefabricated composites, A particular 3D woven fabric with “中” shaped cross section was developed in this study .The fabric was made in a plane loom weaving machine. The designing procedure and processing methods are given in details.

Tearing and Stabbing Strength of Industrial Woven Fabrics

2011 ◽  
Vol 181-182 ◽  
pp. 355-360 ◽  
Author(s):  
Ping Wang
Keyword(s):  
Structural Parameters ◽  
Failure Mechanisms ◽  
Test System ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Mechanical Behaviors ◽  
Tear Strength ◽  
Material Test ◽  
Material Test System

Woven fabrics are widely used in industry. In this paper, mechanical behaviors such as tear strength and stab strength of four kinds of woven fabric with different structural parameters were tested on Material Test System (MTS810.23). The tests were all conducted on both warp and weft directions. The failure morphologies of each woven fabric were observed to unveil the corresponding failure mechanisms.

scholarly journals Investigation of the Tribological Behaviors of Upholstery Woven Fabrics after Abrasion

2020 ◽  
Vol 20 (2) ◽  
pp. 110-120
Author(s):  
Mine Akgun
Keyword(s):  
Surface Roughness ◽  
Surface Deformation ◽  
Structural Parameters ◽  
Roughness Parameter ◽  
Surface Friction ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Roughness Parameters ◽  
Friction Coefficients ◽  
Fabric Surface

AbstractFabric surface tribology is an important area of study in upholstery fabrics, which is exposed to high friction and abrasion effects. In the studies on the tribology of upholstery fabrics, it is ensured that criteria such as better performance, less degradation, increased usage time, and user comfort are determined and taken into consideration in the woven fabric design. Surface roughness and friction coefficients are important parameters used in determining abrasion, deformation, and wear behaviors of fabrics. In this study, the surface abrasion behaviors of upholstery fabrics woven with basic and jacquard weave patterns and also different structural parameters were investigated in terms of the changes in surface roughness parameters (amplitude parameters: Ra, Rpm, and Rvm and hybrid parameters: Δa) and the changes in surface friction coefficients. These results were also related to the state of the visual changes in the fabrics. Rpm, Rvm, and Δa being roughness parameters were found to be important in the evaluation of the surface deformation of the fabrics after abrasion besides the Ra parameter. Results showed that the Δa roughness parameter could be suitable for evaluating the deformation of the textile structures to be used, particularly in sensitive applications.

Geometrical analysis of auxetic woven fabrics based on foldable geometry

2021 ◽  
pp. 004051752110086
Author(s):  
Hasan Kamrul ◽  
Adeel Zulifqar ◽  
Yadie Yang ◽  
Shuaiquan Zhao ◽  
Minglonghai Zhang ◽  
...  
Keyword(s):  
Principal Direction ◽  
Tensile Tests ◽  
Geometrical Model ◽  
Woven Fabrics ◽  
Experimental Results ◽  
Geometrical Parameters ◽  
Empirical Equations ◽  
Geometrical Analysis ◽  
Principal Directions ◽  
Semi Empirical

This paper reports a geometrical analysis of auxetic woven fabrics based on foldable geometry. Two fabrics having different geometrical parameters were first designed and fabricated and then subjected to tensile tests in two principal directions. Based on the experimental observations of the geometry of one fabric structural unit cell at different tensile strains, a geometrical model was first proposed and a relationship between the Poisson’s ratio and tensile strain was then established for each principal direction. Two semi-empirical equations are subsequently obtained for both principal directions by fitting the established relationships with experimental results. After validation by the experimental results of the other fabric, the obtained semi-empirical equations were finally used to predict the auxetic behavior of the fabric with a given geometrical parameter. The calculated and experimental results are found to be in excellent agreement with each other. Therefore, the semi-empirical equations obtained in this study could be useful in the design and prediction of the auxetic behavior of auxetic woven fabrics made with the same type of materials and foldable geometry but with different values of geometrical parameters.

Mechanical Behaviors of Woven Fabrics

2004 ◽  
Author(s):  
Huiyu Sun ◽  
Ning Pan
Keyword(s):  
Mechanical Model ◽  
Structural Parameters ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Research Progress ◽  
Deformation Analysis ◽  
Shear Moduli ◽  
Slip Region ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

This paper introducing some recent research progress consists of two parts: the shear deformation analysis and Poisson’s ratios for woven fabrics. The analytical methods of the shear moduli and Poisson’s ratios for woven fabrics will enable more rigorous studies on such important issues of fabric bending and draping behaviors. A new mechanical model is proposed in this paper to evaluate the shearing properties for woven fabrics during the initial slip region. Compared to the existing mechanical models for fabric shear, this model involves not only bending but also torsion of curved yarns. Analytical results show that this model provides better agreement with the experiments for both the initial shear modulus and the slipping angle than the existing models. Furthermore, another mechanical model for a woven fabric made of extensible yarns is developed to calculate the fabric Poisson’s ratios. Theoretical results are compared with the available experimental data. A thorough examination on the influences of various mechanical properties of yarns and structural parameters of fabrics on the Poisson’s ratios of a woven fabric is given.

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