ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Experimental Study on the Bending Behavior of 3D Woven Glass Fiber Sandwich Composite Panels
بررسی تجربی رفتار خمشی کامپوزیت های پلیمری ساندویچی تقویت شده با
پارچه سه بعدی بافته شده با الیاف شیشه
3
14
131321
EN
Abolfazl
Midrehghan
AUT
Hooshang
Nosraty
AUT
Mahmood M
Shokrieh
Composites Research Laboratory, Center of Excellence in Experimental Solid Mechanics and Dynamics,
School of Mechanical Engineering, Iran University of Science and Technology
Mehdi
Akhbari
Textile Engineering Department, Kashan Branch, Islamic Azad University, Kashan, Iran
Journal Article
2021
06
01
Three-dimensional integrated woven sandwich composites (IWSCs) consist of two woven fabric faces<br />and an integrated hollow core. The two parallel faces are bonded using pile yarns which keep a defined<br />distance between the top and bottom. In order to characterize the mechanical properties, three-point<br />bending test was performed on the IWSC sandwich composites. The results showed that by increasing<br />the thickness of the composite and therefore increasing the moment of inertia, the flexural strength of<br />the specimens increases. The average amount of bending force increase by increasing the thickness for<br />different samples is equal to 80% to 120%. Also, by increasing the pile density, the flexural strength<br />in hybrid and non-hybrid specimens increases. Therefore, the maximum flexural load is obtained from<br />the composites with the highest thickness and pile density. On the other hand, due to the different<br />arrangement of piles in the warp and weft directions, IWSC panels show different behavior in these two<br />directions. The values of flexural strength in the direction of the warp are higher than the direction of the<br />weft due to the higher density of pile yarns and therefore the higher shear strength of the structure in this<br />direction. In different composites, this difference is 75% to 90%. The fracture properties of the composite<br />under bending load show that due to the high strength and modulus of the face-sheets compared to the<br />core section, the piles are more deformed and damaged and the face-sheets are not noticeably damaged.<br />Also, the damage to the top face sheets of samples tested in the weft direction is greater than that of warp <br />direction.
http://www.itast.ir/article_131321_cd616ceea9dd3a571ce60959cf559c9f.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Reinforcing Concrete Columns with Winding Technique Using Weft Knitted Structure
تقویت ستون های بتنی با روش دورپیچی با استفاده از پارچه حلقوی پودی
15
25
131323
EN
Nastaran
Hemmatinezhad
AUT
Ali-Asghar
Asgharian Jeddi
AUT
Hossein
Molavi
AUT
Journal Article
1970
01
01
Reinforcement of civil structures that do not have sufficient resistance to the applied loads is of particular<br />importance. There are several ways to reinforce concrete structures so far. One of these methods is to use<br />winding technique on a concrete structure with a fabric. In this study, first, rib knitted structures with and<br />without weft inserted yarn were fabricated with two types of ordinary and high tenacity polyester yarn<br />(with a low and high modulus). Then concrete columns were made and winded using produced fabrics<br />with and without tension. The compression test was carried out on the winded columns. The results show<br />that with increasing tensile modulus of the fabric (such as weft inserted rib fabric with high tenacity<br />polyester yarn) the compressive strength of the concrete columns increases. Accordingly, while the<br />sample had only 7.52% weight increase and 8.75% increase in diameter compared to the control sample,<br />the bearing capacity of the column showed an increase of 88.55% compared to the control sample. Also,<br />the compressive strength of concrete column is increased by increasing the number of layers winded<br />around the concrete column.
http://www.itast.ir/article_131323_3a78cefca5175c07019a74d7143f4b77.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Effect of Apparel In-store Merchandise Displays in Men’s Stores on Customer Behavior: A Case Study of Tehran City
اثر عوامل محیطی بر رفتار مشتری در فروشگاه های پوشاک مردانه: مطالعه
موردی در شهر تهران
27
42
131324
EN
Reza
Ghasemy Yaghin
AUT
Kimia
Khalajmehri
AUT
Amoon
Ali Daee
AUT
Journal Article
2021
06
01
Usually, the in-store design, lighting, color schemes, and other interior atmosphere could directly affect<br />the purchasing behavior and loyalty regarding retailing stores. The overall purpose of this work is to<br />investigate these factors on customers return and interest and to study the effects of in-store factors on<br />the fashion retailer’s purchase intention in Tehran city. For this purpose, a sample of consumers from<br />22 regions of Tehran city was taken, who usually visited these stores. Data were collected through a<br />well-structured questionnaire and analyzed through confirmatory factor analysis. After designing the<br />statistical hypotheses, they were tested. Our findings indicate that there is a direct relationship between<br />salesforce and lighting on customer return. In addition, specious stores could stimulate the customers<br />to spend significant amount of time in apparel retailing stores. Finally, the statistical significance of the<br />results in the clusters was evaluated by analysis of variance (ANOVA) tests.
http://www.itast.ir/article_131324_98788e4b114f13808891f502e03ede2a.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Modeling and Optimization of Mass and Spring Based Vibration String Using Modal Analysis and Imperialist Competition Optimization Algorithm Methods
مدل سازی و بهینه سازی رشته مرتعش مبتنی بر جرم و فنر با استفاده از روش های تحلیل مودال و الگوریتم بهینه سازی رقابت استعماری
43
56
131325
EN
Mina
Emadi
1. Textile Engineering Department, Faculty of Engineering, Yazd University, Yazd, Iran
Pedram
Peyvandy
yazd
Mohammad Ali
Tavanaie
Center of Excellence for Machine Vision in Textile and Apparel Industry, Yazd University, Yazd, Iran
Mohammad Mahdi
Jalili
Mechanical Engineering Department, Yazd University, Yazd, Iran
Journal Article
2021
06
01
Simulating the mechanical behavior of filaments is of interest in many fields, such as designing a method<br />for quality control of filaments in textile engineering. Various methods have been proposed to simulate<br />a string structure. The mass, spring, and damper model is a conventional physics-based method that has<br />attracted the attention of many researchers due to its rapid simulation and greater accuracy. The purpose<br />of this paper is to present a physical model to simulate the vibrational behavior of a monofilament. This<br />model, which is based on mass and stiffness matrices, plays an essential role in sensitivity analysis and<br />predicting dynamic behavior. First, a system for a realistic simulation of the transverse vibration of the<br />string is presented using a mass, spring and damper model. Then, the model parameters are determined<br />using modal analysis and imperialist competitive algorithm. The vibration of the string was recorded at<br />all points with a high-speed camera, and video processing is done to extract the free decays. Finally, the<br />monofilaments are simulated and compared with their actual results to confirm the model parameters. The<br />results show that the optimized model has the ability to predict the vibrational behavior of monofilaments<br />with an error of less than 12.3%. According to the error values, it can be stated that the results of the<br />modal analysis were more accurate.
http://www.itast.ir/article_131325_04ee4d46ec40afe72619af0ad283169a.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Relationship Between the Comfort Properties of Sport Wear and the Comfort Sensation of Athlete During Activity
ارزیابی ارتباط خواص راحتی پوشاک ورزشی با احساس راحتی ورزشکار
در حال فعالیت
70
57
131326
EN
Mostafa
Jafari
Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran
Fatemeh
Mousazadegan
Textile Engineering Department, Amirkabir University of Technology, Tehran, Iran
Journal Article
2021
06
01
In this study the relation of physical properties of fabric and the comfort feeling of athlete during physical<br />activity is considered. To this end, four single-jersey weft knitted fabrics with various fibers blends were<br />used to prepare sport T-shirts and then athletic comfort during wearing T-shirt and exercising in duration<br />of 60 minutes was investigated, both subjectively and objectively. Furthermore, physical properties of<br />applied fabrics including air permeability, water vapor permeability and thermal insulation properties<br />were measured. Then, the relation of fabric characteristics and athletics comfort during activity was<br />probed. Outcomes confirm that the increase in the body activity leads to the increment of the body<br />temperature and sweating rate. Since cotton fiber absorbs and retains moisture, it keeps the skin wet<br />during high activity level due to the high rate of sweating. On the other hand, polyester fibers owing<br />to the high wicking ability and quick transfer of the moisture vapor to the environment, have better<br />performance. Polyester fabrics with lower stitch density and loose structure have effective performance<br />in terms of both dissipating extra body heat and moisture vapor to the surrounding and providing athletics<br />comfort. The selection of proper sport wear is necessary since the level of physical activity affects the<br />body heat and sweating rate.
http://www.itast.ir/article_131326_0fa30163ac7820fdd7c020b785aed244.pdf
ITAST (Iranian Textile Association of Science and Technology)
Journal of Textiles and Polymers
2322-5203
9
2
2021
06
01
Development of Resizing Software for Paper Patterns
توسعه نرم افزار تغییر اندازه برای الگوهای کاغذی
80
71
131327
EN
Maliheh
Dehghan
Morteza
Vadood
Pedram
Payvandy
Mehdi
Rezaeian
Journal Article
2021
06
01
Today, with the advancement of technology and practical tools, the use of manual methods has become<br />inefficient due to time consuming. The keys to success in clothing production are the correct use of<br />modern tools, new methods of design and production management. In the present study, an attempt was<br />made to provide a fast and accurate method for converting a paper pattern to a modifiable and sizable<br />digital pattern using image processing that is easily accessible and is not required special knowledge. In<br />addition, different types of patterns including female upper body pattern, collar and collar hem, sleeves<br />and pants were prepared. In order to express the results, six levels are considered for the average error<br />obtained from sizing, which are high level (error less than 0.1 cm), relatively high (error between 0.1 cm<br />to 0.4 cm), medium (error between 0.4 cm to 0.6 cm), relatively medium (error between 0.6 cm to 0.8 cm),<br />relatively low (error between 0.8 to 1 cm) and low (error greater than 1 cm). After sizing and evaluating<br />the measured errors, it was concluded that the average total errors in the proposed method to increase and<br />decrease the sizes are 0.33 and 0.266 cm, respectively.
http://www.itast.ir/article_131327_82fb97fae0c32fc02fa16cea85be1862.pdf