Simulative analysis of the bending property of woven fabric by the comprehensive handle evaluation system for fabrics and yarns

2016 ◽  
Vol 87 (16) ◽  
pp. 1977-1990 ◽  
Author(s):  
Fengxin Sun ◽  
Chaoyu Chen ◽  
Sai Liu ◽  
Huanhuan Jin ◽  
Linge He ◽  
...  
Keyword(s):  
Evaluation System ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Bending Test ◽  
Element Analysis ◽  
Textile Materials ◽  
Three Point Bending ◽  
Bending Property ◽  
Bending Process ◽  
Force Displacement

The comprehensive handle evaluation system for fabrics and yarns can be used to measure the bending property of fabrics and yarns based on three-point bending, in principle. In order to gain a better understanding of the bending mechanism of woven fabrics under three-point bending and to better interpret the influencing factors in the bending process, weaving-structure models of woven fabrics were built using finite element analysis based on ABAQUS software. Simulated bending force–displacement curves were compared with experimental curves based on the bending characteristic parameters extracted from the curves, and stress distribution on the fabric and the pressing pin were visually displayed during the bending process. The results show that the simulated curves have good agreement with the experimental curves. The effects of the property parameters of materials, including the Poisson’s ratio, friction coefficient and modulus of yarns and the structure phase and thread arrangement density of fabrics, as well as apparatus parameters, including diameters, the interval of the supporting pins and the distance of the jaws, on bending test were investigated. It is expected that the three-point bending method will help better characterize the bending property of textile materials.

Analysis of a quasi-three-point bending test for fabrics with friction and extensibility effect

2016 ◽  
Vol 87 (18) ◽  
pp. 2179-2192 ◽  
Author(s):  
Fengxin Sun ◽  
Zhaoqun Du ◽  
Weidong Yu ◽  
Xiaorui Hu ◽  
Nanliang Chen
Keyword(s):  
Elastic Constant ◽  
Evaluation System ◽  
Measurement Accuracy ◽  
Bending Test ◽  
Displacement Curve ◽  
Bending Rigidity ◽  
Three Point Bending ◽  
Bending Force ◽  
Force Displacement ◽  
Maximal Relative Error

This paper presents a theoretical bending model to investigate the quasi-three-point bending step of the comprehensive handle evaluation system for fabrics and yarns (CHES-FY). The effect of the friction and extensibility of fabrics on the bending step of the CHES-FY is discussed based on the theoretical bending model in three cases, and bending parameters, including maximum bending force, linear fitting slope and bending work, are featured from the bending force–displacement curves of each case. Comparisons of the theoretical and experimental results were also conducted to validate the model. The results revealed that the friction effect tended to enhance the bending parameters of the bending force–displacement curve of the bending step, and the effect of the friction could be remarkable at low bending rigidity of samples. However, the effect of the extensibility of samples was almost negligible for the bending test of wear fabrics, as the maximal relative error was less than 11.7% for fabrics where the tensile elastic constant was higher than 0.1 N/cm·%. This work can also provide a theoretical guidance for improving the measurement accuracy of the three-point bending test.

scholarly journals Surface Characteristics of Seersucker Woven Fabrics

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Malgorzata Matusiak ◽  
Vladimir Bajzik
Keyword(s):  
Surface Roughness ◽  
Evaluation System ◽  
Surface Friction ◽  
Surface Characteristics ◽  
Measurement Procedure ◽  
Woven Fabrics ◽  
Point Of View ◽  
Woven Fabric ◽  
Weft Yarn ◽  
Surface Parameters

AbstractThe surface characteristics of fabrics are important from the point of view of the sensorial comfort of clothing users. Surface friction and surface roughness are the most important surface parameters of fabrics. These parameters can be measured using different methods, the most important and well-accepted method being that using the Kawabata evaluation system (KES)-FB4 testing instrument. In this work, the surface roughness and surface friction of the seersucker woven fabric have been determined using the KES-FB4. However, the measurement procedure needs modification. On the basis of the results, the influence of the repeat of the seersucker effect and the linear density of the weft yarn on the surface parameters has been determined.

Flexural Behavior of Sandwich Structure with AA 8011 Honeycomb Core and Al 1100 Face Skins

2018 ◽  
Vol 10 (6) ◽  
Author(s):  
M.R. Ashok ◽  
M. Manojkumar ◽  
P.V. Inbanaathan ◽  
R. Shanmuga Prakash
Keyword(s):  
Finite Element Analysis ◽  
Sandwich Structure ◽  
Flexural Behavior ◽  
Bending Test ◽  
Honeycomb Core ◽  
Element Analysis ◽  
Three Point Bending ◽  
The Core ◽  
Flexural Testing ◽  
The Face

This paper details the fabrication and flexural testing of sandwich structure with Aluminium honeycomb core with Aluminium face skins. The material for the face skin is aluminium 1100 and for the core is Aluminium AA8011. The cell size obtained by fabrication is 7mm. The specimen is prepared and tested as per the ASTM standard C393/C393M-11 on a three-point bending test to obtain the ultimate core shear strength and the face skin strength. Finite element analysis is also carried out to validate the experimental test.

scholarly journals In situbending of an Au nanowire monitored by micro Laue diffraction

2015 ◽  
Vol 48 (1) ◽  
pp. 291-296 ◽  
Author(s):  
Cédric Leclere ◽  
Thomas W. Cornelius ◽  
Zhe Ren ◽  
Anton Davydok ◽  
Jean-Sébastien Micha ◽  
...  
Keyword(s):  
Atomic Force Microscope ◽  
Gold Nanowires ◽  
Element Analysis ◽  
Bending Angle ◽  
Three Point Bending ◽  
Atomic Force ◽  
Au Nanowire ◽  
Bending Process ◽  
Diffraction Patterns

This article reports on the first successful combination of micro Laue (µLaue) diffraction with an atomic force microscope forin situnanomechanical tests of individual nanostructures.In situthree-point bending on self-suspended gold nanowires was performed on the BM32 beamline at the ESRF using a specially designed atomic force microscope. During the bending process of the self-suspended wire, the evolution of µLaue diffraction patterns was monitored, allowing for extraction of the bending angle of the nanowire. This bending compares well with finite element analysis taking into account elastic constant bulk values and geometric nonlinearities. This novel experimental setup opens promising perspectives for studying mechanical properties at the nanoscale.

scholarly journals Experimental and Numerical Investigation of the Effect of Different Temperature and Deformation Speeds on Mechanical Properties and Springback behaviour in Al-Zn-Mg-Cu Alloy

Mechanika ◽  
2019 ◽  
Vol 25 (5) ◽  
pp. 406-412
Author(s):  
Suleyman Kilic
Keyword(s):  
Mechanical Properties ◽  
Rate Sensitivity ◽  
High Strength ◽  
Bending Test ◽  
Element Analysis ◽  
Cu Alloy ◽  
Modeling Process ◽  
The Finite Element Analysis ◽  
Bending Process ◽  
Loss Of Strength

Thanks to their low density and high strength, the 7XXX series aluminum alloys are widely used as a support/beam parts in the aerospace industry. This alloy is target in the lightening studies of the automotive industry and surveys for sheet metal are still in progress. It is a series of alloys that can be applied to the aging process and has the most effect on mechanical properties. As formability is quite weak, methods are investigated. In this study, tensile test, bending test and Erichsen tests are performed at different deformation rates and temperatures. As a result of the experiments, it has been seen that the formability increases at high temperature and low deformation rates. If paint baking time is long, there will be no loss of strength. Also, the bending process is modeled with the help of the finite element analysis programs and the springback estimations are examined. It is seen that the results of the modeling process are quite successful. The effect of the strain rate sensitivity is determined.

scholarly journals Comparative Study on Physical and Comfort Properties of Yarns and Hand-woven Fabrics Produced from Virgin and Recycled Fibers

2021 ◽  
Vol 8 (1) ◽  
pp. 52-66
Author(s):  
Dessalegn Awgichew ◽  
Santhanam Sakthivel ◽  
Mekdes Gedlu ◽  
Meseret Bogale
Keyword(s):  
Physical And Mechanical Properties ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Breaking Force ◽  
Textile Materials ◽  
Recycled Fiber ◽  
Cotton Yarns ◽  
Recycled Fibers ◽  
Home Furnishing ◽  
Human Kind

Products produced from textile industries cannot meet the needs for human kind since the population of the world grows exponentially; due to this the recycling of textile materials has gained massive importance in textile and clothing sector. In this study, it was aimed to analyse recycled fibers effect on the yarn and hand loom fabrics as their proportion increases. For this purpose, OE rotor yarns produced by varying the recycled fibers proportion at 25%, 50, and 75% and compared with 100% virgin cotton yarns. The physical and mechanical properties of the yarns such as unevenness, imperfections, hairiness, breaking force, elongation, were measured by Uster Tester 4 SX, Uster Zweigle Hairiness Tester 5, and Uster Tensorapid 3. Then after hand loom fabrics with plain and twill fabrics are produced from produced yarns of different recycled fiber proportions. The effects of recycled fiber proportion on produced hand-woven fabric properties such as pilling, abrasion resistance and air permeability were also evaluated. Results showed that yarns and fabrics produced from recycled fibers blended with virgin cotton are suitable for applications where the strength of yarns and fabric are less critical, but where unevenness, imperfections and handle properties required thus, hand loom fabrics Produced can suitably used for home furnishing applications like table cover, curtains, wall covers and pillow cases.

scholarly journals Design and Electromagnetic Properties of a Conformal Ultra Wideband Antenna Integrated in Three-Dimensional Woven Fabrics

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 861 ◽  
Author(s):  
Ye Kuang ◽  
Lan Yao ◽  
Sheng-Hai Yu ◽  
Shuo Tan ◽  
Xiu-Jun Fan ◽  
...  
Keyword(s):  
Printed Circuit Board ◽  
Three Dimensional ◽  
Life Quality ◽  
Woven Fabrics ◽  
Ultra Wideband ◽  
Circuit Board ◽  
Woven Fabric ◽  
Electromagnetic Properties ◽  
Textile Materials ◽  
High Data

Wearable antennas play an important role in transmitting signals wirelessly in body-worn systems, helping body-worn applications to achieve real-time monitoring and improving the working efficiency as well as the life quality of the users. Over conventional antenna types, ultra wideband (UWB) antennas have advantages of very large operating bandwidth, low power consumption, and high data transmission speed, therefore, they become of great interest for body-worn applications. One of the strategies for making the antenna comfortable to wear is replacing the conventional rigid printed circuit board with textile materials in the manufacturing process. In this study, a novel three-dimensional woven fabric integrated UWB antenna was proposed and fabricated with pure textile materials. The antenna electromagnetic properties were simulated and measured and its properties under bending were investigated. The antenna operated in a wide bandwidth from 2.7 to 13 GHz with the proper radiation pattern and gain value. At the same time, the antenna performance under bending varied in a reasonable range indicating that the antenna is prospectively applied on the curved surfaces of the human body. Additionally, the current distribution of the antenna showed that different conductive parts had different current densities indicating the uniqueness of the three-dimensional textile-based antenna.

Assessment of Sandwich Beam in Three-Point Bending for Measuring Adhesive Shear Modulus

2001 ◽  
Vol 123 (3) ◽  
pp. 322-328 ◽  
Author(s):  
Jianmei He ◽  
Martin Y. M. Chiang ◽  
Donald L. Hunston
Keyword(s):  
Shear Modulus ◽  
Sandwich Beam ◽  
Adhesive Layer ◽  
Test Method ◽  
Bending Test ◽  
Beam Specimen ◽  
Element Analysis ◽  
Three Point Bending ◽  
The Impact ◽  
Made In

A finite element analysis (FEA) was conducted to examine the feasibility of determining the shear modulus of an adhesive in a bonded geometry using a three-point bending test on a sandwich beam specimen. The FEA results were compared with the predictions from two analytical solutions for the geometry used to determine the impact of the assumptions that were made in these analyses. The analytical results showed significantly different to the values obtained from other experiments on bulk samples of the adhesive in the glassy region. Although there were some agreements in rubbery region, the negligible sensitivity of the beam stiffness to the presence of adhesive layer makes the agreements very questionable. To examine the possible explanations for these differences in glassy adhesives, sensitivity analysis was conducted to explore the effects of experimental variables. Some possible reasons for the differences are discussed, but none of these reasons taken alone satisfactorily account for the discrepancies. Until an explanation is found, the three-point bending test using a sandwich beam specimen to determine the adhesive shear modulus might not be a desirable test method, at least for the range of geometry examined in this study.

scholarly journals The study of the bending property of the epoxy (Ep / MgO) and (Ep/SiO2) composites in natural conditions and after immersion in chemical solution

2019 ◽  
Vol 16 (39) ◽  
pp. 93-102
Author(s):  
Baraa Khalil Ibrahim
Keyword(s):  
Sulfuric Acid ◽  
Weight Ratio ◽  
Base Material ◽  
Load Level ◽  
Bending Test ◽  
Chemical Solution ◽  
Natural Conditions ◽  
Three Point Bending ◽  
Bending Property ◽  
Dioxide Powder

In this paper, a polymer-based composite material was prepared by hand Lay-up method consisting of epoxy resin as a base material reinforced by magnesium oxide powder once and silicon dioxide powder again and with different weight ratios (3, 6, 9 and 12) wt %. The three-point bending test was performed in normal conditions and after immersion in sulfuric acid. The results showed that the bending value decreased with the increase of the weighted ratio of the reinforcement material (MgO, SiO2). The Bending of samples reinforced by SiO2 was found to be less than the bending of samples reinforced by particles (MgO). For example, the bending of the SiO2 sample (0.32 mm) at the weighted ratio (3%) and for the MgO (0.18mm) sample at the weight ratio were the same weighted load (100 g). It was found that the bending values of all samples exceeded the value after immersion in sulfuric acid. For example, the percentage of weight (6%) at the load level (500 g) was changed from 1.16 mm in normal conditions to 1.48mm for the same weight ratio after immersion. In sulfuric acid diluted with 0.3N for 10 days at the same applied load.

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