scholarly journals Analysis of woven fabric in asymmetric tensile loading using parabolic approximation of tensile nonlinearity

2019 ◽  
Vol 14 ◽  
pp. 155892501986096
Author(s):  
Željko Šomođi ◽  
Emilija Zdraveva ◽  
Snježana Brnada
Keyword(s):  
Good Accuracy ◽  
Tensile Loading ◽  
Woven Fabrics ◽  
The Body ◽  
Woven Fabric ◽  
Parabolic Approximation ◽  
Geometric Conditions ◽  
Apparent Reduction ◽  
Representative Selection ◽  
Selection Of

Unlike many other engineering materials, deformational behaviour of fabrics is marked by specific nonlinearities. For the purpose of certain engineering analyses, nonlinearity can be approximately described by means of appropriate models. A number of possibilities in approximation of tensile nonlinearity are statistically analysed and compared for the representative selection of woven fabrics. Second-order parabolic approximation is estimated to combine simplicity and good accuracy for a selected woven fabric. It is then included into deformational analysis of specimen in asymmetric tensile loading, as the case representative for structural application of textile, where geometric conditions combined with material properties define the mechanical behaviour of the body. The results indicate the factors of stress concentration due to load eccentricity. Simulation of tensile test gives the theoretical prediction of apparent reduction in stiffness and strength of the specimen in terms of the load eccentricity.

Deformation behavior of auxetic woven fabric made of foldable geometry in different tensile directions

2020 ◽  
Vol 91 (1-2) ◽  
pp. 87-99
Author(s):  
Hasan Kamrul ◽  
Weiguo Dong ◽  
Adeel Zulifqar ◽  
Shuaiquan Zhao ◽  
Minglonghai Zhang ◽  
...  
Keyword(s):  
Poisson’S Ratio ◽  
Tensile Deformation ◽  
Tensile Loading ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Ratio Effect ◽  
Negative Poisson's Ratio ◽  
Principal Directions

Auxetic woven fabrics made with special geometrical structures have gained the interest of textile scientists in recent years. This paper reports a study on auxetic woven fabric based on a double-directional parallel in-phase zig-zag foldable geometrical structure. Such a fabric has been already produced and investigated for its negative Poisson's ratio effect in two principal directions (weft and warp directions). However, its negative Poisson's ratio effect in biased tensile directions as well as under repeated tensile loading conditions has not been studied yet. Therefore, in this paper, these two limitations are addressed. The auxetic woven fabric was firstly fabricated, and then subjected not only to tensile tests in different tensile directions, including two principle directions and three biased directions, but also to repeated tensile loading. It was found that both the negative Poisson's ratio effect and the resistance to tensile deformation are dependent upon the tensile direction, and the highest negative Poisson's ratio effect and higher resistance to tensile deformation are obtained in two principal directions.

scholarly journals APPLICATION OF ORIGINAL WOVEN SURFACE DESIGNS ON THE CLOTHING

2020 ◽  
Vol 9 (72) ◽  
Keyword(s):  
Woven Fabrics ◽  
Woven Fabric ◽  
Color Selection ◽  
Clothing Design ◽  
Weave Fabric ◽  
Selection For ◽  
Fabric Design ◽  
Different Parts ◽  
Selection Of

Woven fabrics date back to the ancient ages and have been extensively used particularly in apparel, home textile, and other industries. The selection of yarn and knitting technique are among the important factors in fabrication of woven fabric surfaces with high aesthetical value. Particularly color selection for yarn used in fabrication of woven fabrics has a significant effect on the appearance of the final product. The ever-increasing quality of life brings about the need for new and different looks among individuals. In this work, the course of development and fabrication for a simple woven fabric has been studied, and the obtained products were used in apparel designs. In this context, first the theme was determined, and then pattern designs and patterns were woven in 25*25 cm size. The woven fabrics were used as detail on different parts of outfits designed under the theme “steet fashion”. Also, two of the designs were chosen and manufactured as final-products. Accordingly, different and modern designs were introduced by bringing the obtained woven surfaces together with dresses. Keywords: woven design, plain weave, fabric design, clothing design

The Tearing of Plain Woven Fabrics Made From Ring, Open End, Twistless and Twisted Bonded Yarns

1980 ◽  
Vol 102 (4) ◽  
pp. 352-359 ◽  
Author(s):  
P. R. Lord ◽  
W. C. Stuckey
Keyword(s):  
Elastic System ◽  
Woven Fabrics ◽  
The Body ◽  
Woven Fabric ◽  
Elastic Response ◽  
Dynamic Effects ◽  
Tear Strength ◽  
Ring Open

The theory relating to the tearing of a plain woven fabric is developed to include the dynamic effects in the damped mass-elastic system. Experimentation with a variety of staple yarns shows that the mass elastic response has a significant effect on the behavior of the fabric undergoing tear. In particular, the intermittent slippage of the yarns from the body of the fabric into the del zone is of great importance. The greater the number of unbroken yarns in the del zone, the greater is the tear strength for a given yarn.

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.

scholarly journals Validation of Design of Regular Carbon Fabric Composite Plate with Woven Fabric using Tensile Loading

2021 ◽  
Vol 13 (4) ◽  
Author(s):  
Sushma D. Thorat ◽  
V. S. Mahajan
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Tensile Force ◽  
Tensile Loading ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Light Weight ◽  
Carbon Fabric ◽  
Fabric Composite ◽  
Carbon Fabrics

In many recent years the use of composite materials increases in many fields, for example agricultural uses, where these materials are characterized by good mechanical properties, tenacity and light weight. Among many other materials for the reinforcement of composites, technical fabrics are increasingly being used for the same purpose, especially from carbon fiber, which have good mechanical properties. During tensile stress these fabrics are elongated in the direction of tensile force, and at the same time they contract crosswise in relation to the action of the tensile force. In this Project the tensile properties of regular carbon fabrics and woven fabrics made from carbon fiber yarns were investigated. Static structural analysis of Regular carbon fabrics and woven fabrics base carbon fiber specimen will be done using ACP tool in ANSYS 19 software.

scholarly journals Accounting and evaluation of chemical footprint of cotton woven fabrics

2020 ◽  
Vol 71 (03) ◽  
pp. 209-214
Author(s):  
JIA-HONG QIAN ◽  
YU-YING QIU ◽  
YI-DUO YANG ◽  
YI LI ◽  
PING-HUA XU ◽  
...  
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Environmental Impacts ◽  
Woven Fabrics ◽  
Ecological System ◽  
Woven Fabric ◽  
Toxic Substances ◽  
Management Efficiency ◽  
Selection Of ◽  
Textile Products

The major environmental impacts of textile products tend to arise from emissions of toxic substances in the production phase of the life cycle. The theory of chemical footprint (ChF) can be used to study the environmental impact of textile products and leads a new way to quantitatively assess impacts of toxic substances. In this paper, environmental impacts of 1 kg cotton woven fabric were assessed from yarn to finished fabric in terms of its contributions to the ecological system. The results showed that the total ChF in the calculation boundary associated with ecotoxicity was approximately 41526.10 PAF·m3·d. The largest ChF for cotton woven fabric mainly came from weaving process, followed by cultivation and harvesting and fabric processing phases. Sizing agent and all kinds of base potentially created the large ecotoxicity and there are considerable differences in magnitude from other materials’ ecotoxicity. It also revealed that the selection of auxiliaries was more important than that of dyestuffs. ChF does well in drawing more focus on the source of industry pollution and plays an important role in improving management efficiency in assessing and choosing chemicals.

Deformation behavior of auxetic woven fabric based on re-entrant hexagonal geometry in different tensile directions

2019 ◽  
Vol 90 (3-4) ◽  
pp. 410-421 ◽  
Author(s):  
Hasan Kamrul ◽  
Adeel Zulifqar ◽  
Hong Hu
Keyword(s):  
Deformation Behavior ◽  
Geometrical Structure ◽  
Tensile Loading ◽  
Tensile Tests ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Poisson's Ratio ◽  
Negative Poisson’S Ratio ◽  
Tensile Direction ◽  
Negative Poisson's Ratio

Auxetic woven fabrics made of non-auxetic yarns have gained the interest of textile scientists in recent times. Such fabrics have already been produced and investigated for their negative Poisson's ratio (NPR) effect in two principle directions. However, the NPR effect of these fabrics in different biased tensile directions has not been studied. In particular, the influence of repeated tensile loading on the NPR effect retention ability of fabric has not been explored yet. Therefore, this paper aims to report the NPR effect of auxetic woven fabric in different tensile directions and the influence of repeating tensile cycle tests on its NPR effect retention ability. The auxetic woven fabric is firstly fabricated based on a re-entrant hexagonal geometrical structure by using elastic and non-elastic yarns, and then subjected to single and repeating tensile tests in five different tensile directions, which include two principle directions and three biased directions. It is found that the NPR effect is largely dependent upon the tensile direction and the number of repeating tensile cycles.

scholarly journals Moisture Management Properties of Seersucker Woven Fabrics of Different Structure

2019 ◽  
Vol 27 (3(135)) ◽  
pp. 43-50
Author(s):  
Małgorzata Matusiak
Keyword(s):  
Transport Properties ◽  
Liquid Water ◽  
Moisture Transport ◽  
Woven Fabrics ◽  
Point Of View ◽  
The Body ◽  
Woven Fabric ◽  
Textile Materials ◽  
Moisture Management ◽  
The Relationship

Moisture management is defined as the controlled movement of water vapour and liquid water (perspiration) from the surface of the skin to the atmosphere through the fabric. The ability of moisture transport is a very important feature of textile materials from the point of view of the physiological comfort of usage clothing made of these materials. Among the different textile materials (woven, knitted and nonwoven), seersucker woven fabric is considered as having good comfort-related properties. The fabrics are characterised by the occurrence of puckered and flat strips in the warp direction. The puckered effect generates air spaces between the body and the fabric, keeping the wearer cool in hot conditions as the puckered area holds the fabric away from the skin during usage. In the work presented, seersucker woven fabrics of different patterns of the puckered strips were investigated. The aim of the work was to analyse the relationship between the structure of seersucker fabrics and their moisture management properties. Measurement of the moisture transport properties of seersucker woven fabrics was made using a Moisture Management Tester M290, produced by SDL Atlas. Investigations performed showed that the properties of seersucker woven fabrics characterising their ability to transfer liquid moisture are different depending on the variant of the repeat of puckered strips.

PENGEMBANGAN BAHAN AJAR IPA SMP PADA TEMA ENERGI DALAM TUBUH MENGGUNAKAN METODE 4STMD

EDUSAINS ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 166-175
Author(s):  
Gia Juniar Nur Wahidah ◽  
Sjaeful Anwar
Keyword(s):  
Concept Maps ◽  
The Body ◽  
Instructional Materials ◽  
Teaching Material ◽  
Test Results ◽  
Teaching Materials ◽  
Eligibility Criteria ◽  
Material Development ◽  
Selection Step ◽  
Selection Of

Abstract This research aims to produce science teaching materials in junior level with Energy in The Body as the theme using Four Steps Teaching Material Development  (4STMD). The material is presented in an integrated way so that students can  think holistically and contextually. The method used in this study is Research and Development. In this R&D methods is used 4STMD. There are four steps done on the development of teaching materials, the selection step, structuring step, characterization, and didactic reduction. Selection step includes the selection of indicators in accordance with the demands of the curriculum which is then developed with the selection of concepts and values that are integrated with the concept of science. Structuring step includes make macro structures, concept maps, and multiple representations. Characterization's step includes preparation instruments, then  trial to students to identify difficult concepts. The last, didactic reduction was done by neglect and the annotations in the form of sketches.The test results readability aspect instructional materials lead to the conclusion that by determining the main idea, the legibility of teaching materials reached 67%, with moderate readability criteria. Test results of feasibility aspects based on the results of questionnaires to the 11 teachers lead to the conclusion that the overall, level of eligibility teaching materials reached 91% with the eligibility criteria well. Keywords: teaching materials; energy; 4STMD Abstrak Penelitian ini bertujuan untuk menghasilkan bahan ajar IPA SMP pada tema Energi dalam Tubuh menggunakan metode Four Steps Teaching Material Development (4STMD). Materi disajikan secara terpadu sehingga memacu siswa untuk berpikir secara holistik dan kontekstual. Metode penelitian yang digunakan pada penelitian ini adalah metode penelitian dan pengembangan. Dalam penelitian dan pengembangan yang ini, digunakan metode Four Steps Teaching Material Development (4STMD). Terdapat empat tahap yang dilakukan pada pengembangan bahan ajar, yakni tahap seleksi, strukturisasi, karakterisasi, dan reduksi didaktik. Tahap seleksi meliputi pemilihan indikator yang sesuai dengan tuntutan kurikulum yang kemudian dikembangkan dengan pemilihan konsep dan nilai yang diintegrasikan dengan konsep IPA. Tahap strukturisasi meliputi pembuatan struktur makro, peta konsep, dan multipel representasi dari materi. Tahap karakterisasi meliputi penyusunan instrumen karakterisasi, kemudian uji coba kepada siswa untuk mengidentifikasi konsep sulit. Tahap terakhir, yaitu reduksi didaktik konsep terhadap konsep sulit. Reduksi didaktik yang dilakukan berupa pengabaian dan penggunaan penjelasan berupa sketsa. Hasil uji aspek keterbacaan bahan ajar menghasilkan kesimpulan bahwa berdasarkan penentuan ide pokok, keterbacaan bahan ajar mencapai 67%, dengan kriteria keterbacaan tinggi. Hasil uji aspek kelayakan berdasarkan hasil angket terhadap 11 orang guru menghasilkan kesimpulan bahwa secara keseluruhan tingkat kelayakan bahan ajar mencapai 91% dengan kriteria kelayakan baik sekali. Kata Kunci: bahan ajar; energi; 4STMD  Permalink/DOI: http://dx.doi.org/10.15408/es.v8i2.2039  

scholarly journals The dynamic of body and brain co-evolution

2021 ◽  
pp. 105971232199468
Author(s):  
Paolo Pagliuca ◽  
Stefano Nolfi
Keyword(s):  
Morphological Traits ◽  
The Body ◽  
Morphological Variations ◽  
And Control ◽  
Selection Of

We introduce a method that permits to co-evolve the body and the control properties of robots. It can be used to adapt the morphological traits of robots with a hand-designed morphological bauplan or to evolve the morphological bauplan as well. Our results indicate that robots with co-adapted body and control traits outperform robots with fixed hand-designed morphologies. Interestingly, the advantage is not due to the selection of better morphologies but rather to the mutual scaffolding process that results from the possibility to co-adapt the morphological traits to the control traits and vice versa. Our results also demonstrate that morphological variations do not necessarily have destructive effects on robots’ skills.

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