ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Parameter Estimation of Viscoelastic Model to Simulate the Compression Behavior of Artificial Grass under Dynamic Loading Using Imperialist Competitive Algorithm
Parameter Estimation of Viscoelastic Model to Simulate the Compression Behavior of
Artificial Grass under Dynamic Loading Using Imperialist Competitive Algorithm
1
12
126730
EN
Journal Article
2021
02
20
In this study, the parameters of linear Jeffrey’s<br />model are estimated using imperialist competitive algorithm<br />to simulate the compression behavior of artificial grass under<br />dynamic loading. To this end, a viscoelastic model is used<br />to explain this behavior according to ISO 2094. The model<br />consists of a linear spring and a dashpot set parallel to each<br />other. This combination is placed in series with a linear dashpot.<br />The Fourier transform periodic excitation is converted to the<br />summation of harmonic forces. Then, differential equations of<br />the system motion are solved analytically. The result predicted<br />for the compression behavior of artificial grass in dynamic<br />loading is compared with the experimental results. According<br />to the results, the average value of error for prediction of the<br />compression behavior is 5.68%. Therefore, the linear Jeffreyʼs<br />II model has a high ability to predict the compression behavior<br />of artificial grass under dynamic loading.
http://www.itast.ir/article_126730_74208fe16f706e703501f60ecbc7dec5.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Study on Breast Shape Changing in Various Body Positions Using Depth Camera13
Study on Breast Shape Changing in Various Body Positions Using Depth Camera
13
26
126731
EN
Journal Article
2021
02
20
In this research, 3D scan based on depth camera<br />is used to measure, and analyze the breast shape changes<br />in various body positions. 3D breast shapes of women are<br />extracted from data obtained from a depth camera. A<br />measurement method is developed based on cross section<br />lines to get the 2D breast pattern. 3D breast shape and 2D<br />breast patterns in five body positions are determined and<br />compared to each other. To calculate the difference, 3D<br />breast form and volume, also area and form of 2D breast<br />pattern are measured. The results show that the breast<br />form and volume in various body positions is not the same.<br />Women have the highest volume and area of breast in the<br />position ‘posture of 45 elbow-bend and arms to the back’<br />subsequent the position ‘posture of 45 elbow-bend and<br />arms to the front’, ‘lower arm beside the body ‘ and ‘raise<br />arm overhead and holding on the brow’, respectively. Also<br />in the position ‘holding arm overhead’ the lowest volume<br />of breast for women is observed. The difference of breast<br />volume in the largest and smallest shape is about 23%. The<br />combination of measuring breast volume and form at the<br />same time can provide effective information for bra cup <br />design.
http://www.itast.ir/article_126731_4abc20f93016d2c55f961ddbc499a48a.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Modeling and Optimization of Colloidal Nanosilver Pretreatment on Acid-Free Dyeing, Antibacterial, and Hydrophilicity of Polyamide-6,6 Using Response Surface Methodology
Modeling and Optimization of Colloidal Nanosilver Pretreatment on Acid-Free Dyeing, Antibacterial, and Hydrophilicity
of Polyamide-6,6 Using Response Surface Methodology
27
40
126732
EN
Journal Article
2021
02
20
Enhancement of dyeability, antibacterial, and<br />hydrophilicity of polyamide-6,6 was introduced with colloidal<br />silver nanoparticles (CSNs) and butane tetra carboxylic acid<br />(BTCA) using cubic statistical models. Different concentrations<br />of CSNs and BTCA were investigated to evaluate their<br />influences on dyeability, antibacterial, hydrophilicity, and<br />color change properties of polyamide-6,6 fabric by applying<br />statistical design of D-optimal method. Antibacterial property<br />of treated sample was tested by Gram-negative bacterium<br />Escherichia coli and Gram-positive bacterium Staphylococcus<br />aureus. To achieve optimum conditions for polyamide-6,6,<br />response surface methodology was also utilized. Here, CSNs<br />were stabilized on polyamide-6,6 surface using BTCA as<br />crosslinking agent in order to enhance washing durability.<br />Scanning electron microscopy and energy-dispersive<br />spectroscopy were employed to characterize presence of CSNs<br />on surface of polyamide-6,6 and elemental composition of<br />treated polyamide-6,6 fabrics. Treatment optimization led to<br />considerably absorption enhancement of C.I. Acid Red 81 dye<br />through cubic statistical models on polyamide-6,6 surfaces as<br />well as antibacterial and hydrophilicity characteristics and<br />minimized color change caused due to CSNs influence. The<br />principal result is synergetic effect utilizing BTCA accompany<br />with CSNs on enhancing and durability of mentioned<br />properties quantitatively in optimized conditions. Overall,<br />the suggested method could be introduced as a new route,<br />disclosing various desirable multifunctional characteristics to<br />polyamide-6,6 fabric.
http://www.itast.ir/article_126732_6e1ad682eac3832a90980938836ded98.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Effect of Seam Stabilizing Tapes on the Recovery Properties of Sewn Fabrics
Effect of Seam Stabilizing Tapes on the Recovery Properties of Sewn Fabrics
41
50
126733
EN
Journal Article
2021
02
20
Maintaining and improving the garment quality<br />are the important topics in the textile and apparel industry.<br />The aim of this paper is to investigate the influence of some<br />textile tapes on elastic properties as well as dynamic recovery<br />of the seams and enhance the shape stability. Three samples<br />were prepared, namely weft knitted sewn fabrics without any<br />stabilizing tape, and weft knitted sewn fabrics stabilized with<br />bias woven fabric, and with stretch ribbons. The results show<br />that hysteresis area of the seam tensile curves decreased by<br />increasing the loading cycles, and dynamic work recovery<br />stabilized after the third cycle. The tensile stress of all sewn<br />samples in the course direction is significantly less than the<br />stress value in the wale direction. It is found that the seams<br />stabilized with stretch ribbons have the highest dynamic<br />work recovery (~40-70%). Also, when the seam position and<br />the loading direction aligned, the dynamic work recovery of<br />the stabilized samples increased. The recovery behavior of<br />the stabilized sewn fabrics was also simulated by mechanical<br />models consisting of spring and dashpot elements. The threeelement<br />model, consisting of the Maxwell body paralleled<br />with a non-linear spring, properly estimated the force–strain<br />curves of the stabilized sewn fabrics under cyclic loading.
http://www.itast.ir/article_126733_a951835a551ce7a727eab40dc9f3a1eb.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Effect of Brand Image and Interior Design of Sportswear Retailers on Loyalty: A Statistical Approach
Effect of Brand Image and Interior Design of Sportswear Retailers on Loyalty: A Statistical Approach
51
64
126734
EN
Journal Article
2021
02
20
This paper examines the impact of interior design<br />and brand image on repurchasing and customer loyalty for<br />sportswear products. In doing so, stratified sampling of target<br />markets is considered for data gathering. In this respect,<br />we apply C-means clustering technique regarding crucial<br />attributes affecting customers’ market of sportswear. The data<br />are collected using a self-administered questionnaire from<br />respondents belonging to the resultant clustered market. We<br />make the most of factor loads and t-test analysis to investigate<br />the proposed conceptual model. Moreover, this study is<br />performed by using SPSS to verify the reliability, and validity<br />of the measured variables. Hypothesis tests are done utilizing<br />structural equation model (SEM) as a statistical method. The<br />results of this paper indicate the significant relations among<br />interior design, brand image and customer loyalty. Finally, oneway<br />and two-way analyses of variance (ANOVA) are conducted<br />in order to clarify dependency of findings to demographical<br />variables.
http://www.itast.ir/article_126734_aff7de42b10343886b0781e31a41cdec.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
1
2021
01
01
Investigation on Physical and Mechanical Properties of Denim Woven Fabrics Made from Different Spandex Percentages
Investigation on Physical and Mechanical Properties of Denim Woven Fabrics Made from Different Spandex
Percentages
65
75
126735
EN
Journal Article
2021
02
20
The main topic investigated in this paper is the<br />analysis of the effect of different spandex percentages on<br />physical and mechanical properties of the denim fabric. The<br />results showed that percentage of elastane has a significant<br />effect on the physical and mechanical properties of cotton/<br />elastane woven denim fabric. The influence of various<br />elastane percentages via the above denim fabric performance<br />parameters is investigated by employing a one-way analysis<br />of variance (ANOVA) statistical software package. Tensile<br />strength of denim fabric decreases as the percentage of the<br />elastane increases because of the lower tenacity of spandex<br />fibers compared to cotton fibers. Fabric breaking elongation<br />increases as spandex percentage increases. The tear strength<br />of denim fabric decreases as elastane percentage increases. As<br />spandex percentage increased, the fabric contraction of the<br />woven fabric increased, which made the fabric more compact<br />and bulk, resulting in higher fabric thickness, fabric weight,<br />and deep shade color. In addition, fabric stretchability and<br />fabric elastic recovery increase with spandex percentage since<br />elastane has higher stretch and makes the structure more<br />compact, but fabric growth decreases as spandex percentage<br />increases, due to the rather high recovery properties of<br />spandex. The obtained results showed that Lycra proportion<br />inside fabric has an effect on the fabric tensile strength,<br />breaking extension, tear strength, stretchability, fabric<br />thickness, GSM, and fabric shade color.
http://www.itast.ir/article_126735_569503bbec9ec666eaa489297049c4d5.pdf