The Analysis of the Deformational Behavior and Mechanical Properties of Composite Yarn under the Conditions of Small Deformation

2011 ◽  
Vol 239-242 ◽  
pp. 3024-3027
Author(s):  
Xin Mei Fan ◽  
Hao Li Xia ◽  
Zhao Xiang Zheng ◽  
Yan Pei Li ◽  
Yuan Xue
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stress Relaxation ◽  
Recovery Rate ◽  
Elastic Recovery ◽  
Fiber Composite ◽  
Small Deformation ◽  
Constant Load ◽  
Cotton Yarn ◽  
Composite Yarn

This paper studied the mechanical behavior of the filament/staple fiber composite yarn and the pure cotton yarn under the isostress and isostrain of cycling tensile strength with the conditions of small deformation. And it also analyzed the elastic recovery rate, creep rate and stress relaxation rate under the different deformation rate and load. The results show that the mechanical properties of elastic recovery rate, stress relaxation and creep all keep in good range in the experiment of cycling tensile strength with low certain elongation and constant load; as the increase of certain elongation and constant load, the mechanical properties of elastic recovery rate, stress relaxation and creep have much difference, just in terms of the conformality under the cyclic tensile strength, PET/PU/cotton composite yarn shows the best, next is the PU/cotton composite yarn, and then next is the PET /cotton composite yarn, and the pure cotton yarn shows the worst.

The Analysis of Composite Yarn Fabric Mechanical Properties by KES System

2012 ◽  
Vol 532-533 ◽  
pp. 340-343
Author(s):  
Jing Jing Shi ◽  
Bin Hu ◽  
Yuan Xue
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Evaluation System ◽  
Small Deformation ◽  
Research Process ◽  
Cotton Yarn ◽  
Composite Yarn ◽  
Noticeable Improvement ◽  
Solid Foundation ◽  
Fabric System

This paper studied the mechanical behavior of composite yarn fabrics and pure cotton yarn fabrics with the conditions of small deformation, then making some comparison. KES-F (Kawabata Evaluation System for Fabric) system was used in the research process. The study shows that the fabric samples made of composite yarn exhibit noticeable improvement on mechanical property after using composite yarn. The results lay a solid foundation for the application and extension of composite yarn fabrics.

The Effect of Yarn Linear Density on Mechanical Properties of Plain Woven Kenaf Reinforced Unsaturated Polyester Composite

2013 ◽  
Vol 465-466 ◽  
pp. 962-966 ◽  
Author(s):  
Mohd Pahmi bin Saiman ◽  
Mohd Saidin Bin Wahab ◽  
Mat Uzir Wahit
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Linear Density ◽  
Unsaturated Polyester ◽  
Composite Panel ◽  
Composite Yarn ◽  
Polyester Composite ◽  
The Impact ◽  
Woven Kenaf

To produce a good quality of dry fabric for reinforced material in a natural-based polymer composite, yarn linear density should be in consideration. A woven kenaf dry fabric with three different linear densities of 276tex, 413.4tex and 759tex were produced. The fabrics with different linear densities were been optimize with the assistance of WiseTex software. The optimized dry fabrics were infused with unsaturated polyester to produce composite panel using vacuum infusion process. The composites properties were tested on the tensile strength, flexural strength and the impact strength. The result shows that the mechanical properties of the composite increased when the yarn linear densities increased.

scholarly journals Thermal and Mechanical properties of epoxy-jute fiber composite

2014 ◽  
Vol 27 (2) ◽  
pp. 77-82 ◽  
Author(s):  
H Ahmad ◽  
MA Islam ◽  
MF Uddin
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Fiber Length ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Young Modulus ◽  
Fiber Content ◽  
Jute Fiber ◽  
Elongation At Break

Chopped jute fiber-epoxy composites with varying fiber length (2-12 mm) and mass fraction (0.05-0.35) had been prepared by a heat press unit. The cross-linked product was characterized in terms of specific gravity, thermal conductivity, tensile strength, Young modulus and elongation at break. The transverse thermal conductivities for randomly oriented fibers in the composite were investigated by Lees and Charlton’s method. The tensile strength, Young modulus and elongation at break were investigated by a Universal Tensile Tester. With an increase in the fiber content (irrespective of the fiber length), the thermal conductivity of the composite decreases; the decreasing rate being highest for the fiber length of 2 mm followed by that for the fiber length of 6 and 12 mm. The decreasing rate of the thermal conductivity of the jute-epoxy composite is comparatively higher to that reported in literature for acrylic polymer hemp fiber composite. The tensile strength also decreases with the increase of the fiber content in the composite. The fiber length does not show to have significant effect on the tensile strength of the composite; the variation in strength being masked within experimental error. The Young modulus increases with the increase of fiber content within elastic limit; showing the highest values for the fiber length of 6 mm followed by those for the fiber length of 2 mm and 12 mm. The elongation at break shows slightly increasing trend up to 15% fiber content, but beyond that it decreases drastically. The specific gravity decreases with the increase in the fiber content and thus the recalculated specific tensile strength is found to keep at a stable level of 36MPa up to the fiber content of 20%, and beyond that the specific tensile strength decreases with the increase in the fiber content. It is concluded that jute fiber-epoxy composite could be used as a good heat-insulating material. Further investigation is recommended on the improvement of the thermal insulation keeping the mechanical properties unchanged or even improved. The TGA study is also required to ascertain the field of application of the material. DOI: http://dx.doi.org/10.3329/jce.v27i2.17807 Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 2, December 2012: 77-82

Modification of Cotton Yarns for Smart Socks Production

2019 ◽  
Vol 800 ◽  
pp. 331-335
Author(s):  
Ieva Bake ◽  
Vineta Afanasjeva ◽  
Silvija Kukle
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Linear Density ◽  
Sol Gel ◽  
Antimicrobial Properties ◽  
Mean Value ◽  
Cotton Yarn ◽  
Yarn Strength ◽  
Prototype Development ◽  
Cotton Yarns

The functionality of textiles can be complimented by using a wide variety of modification technologies. This study focuses on textile modification with sol-gel technology as a part of smart sock prototype development. Zinc acetate dehydrate (ZAD) is integrated in sol synthesis and used as modifier thus improving modified cotton yarn mechanical properties and also can prolong time between washing, taking into account modifiers antimicrobial properties. Four hanks of pure cotton yarns with length of 300 m, where modified with silica-based sol with 7,5 wt% ZAD as a modifier. As a part of this study tensile strength and elongation of yarn was determined and changes in liner density were observed. Average yarn linear density increases by 19 % and linear density for knitted samples increases by 2,6 %. Therefore, yarn strength for 80 % of modified samples shows mean value of 2,32 N, that is 17 % higher than unmodified samples.

scholarly journals Effect of Environmental Degradation on Mechanical Properties of Kenaf/Polyethylene Terephthalate Fiber Reinforced Polyoxymethylene Hybrid Composite

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Mohamad Zaki Abdullah ◽  
Yakubu Dan-mallam ◽  
Puteri Sri Melor Megat Yusoff
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Environmental Degradation ◽  
Hybrid Composite ◽  
Fiber Composite ◽  
Accelerated Weathering ◽  
Fiber Reinforced ◽  
Kenaf Fiber ◽  
Pet Fibers ◽  
Outdoor Application

The main objective of this research is to investigate the effect of environmental degradation on the mechanical properties of kenaf/PET fiber reinforced POM hybrid composite. Kenaf and PET fibers were selected as reinforcements because of their good mechanical properties and resistance to photodegradation. The test samples were produced by compression molding. The samples were exposed to moisture, water spray, and ultraviolet penetration in an accelerated weathering chamber for 672 hours. The tensile strength of the long fiber POM/kenaf (80/20) composite dropped by 50% from 127.8 to 64.8 MPa while that of the hybrid composite dropped by only 2% from 73.8 to 72.5 MPa. This suggests that the hybrid composite had higher resistance to tensile strength than the POM/kenaf composite. Similarly, the results of flexural and impact strengths also revealed that the hybrid composite showed less degradation compared to the kenaf fiber composite. The results of the investigation revealed that the hybrid composite had better retention of mechanical properties than that of the kenaf fiber composites and may be suitable for outdoor application in the automotive industry.

scholarly journals Tensile Strength and Creep Resistance in Nanocrystalline Cu, Pd and Ag

1990 ◽  
Vol 206 ◽  
Author(s):  
G. W. Nieman ◽  
J. R. Weertman ◽  
R. W. Siegel
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
True Strain ◽  
Constant Load ◽  
Creep Tests ◽  
Grain Sizes

ABSTRACTMeasurements of tensile strength and creep resistance have been made on bulk samples of nanocrystalline Cu, Pd and Ag consolidated from powders by cold compaction. Samples of Cu-Cu2O have also been tested. Yield strength for samples with mean grain sizes of 5–80 nm and bulk densities on the order of 95% of theoretical density are increased 2–5 times over that measured in pure, annealed samples of the same composition with micrometer grain sizes. Ductility in the nanocrystalline Cu has exceeded 6% true strain, however, nanocrystalline Pd samples were much less ductile. Constant load creep tests performed at room temperature at stresses of >100 MPa indicate logarithmic creep. The mechanical properties results are interpreted to be due to grain size-related strengthening and processing flaw-related weakening.

Effect of Nucleating Agent on the Structure and Mechanical Properties of Oriented PET

2014 ◽  
Vol 912-914 ◽  
pp. 445-455 ◽  
Author(s):  
Qian Wei Xu ◽  
Xian Kun Meng
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stress Relaxation ◽  
Nucleating Agent ◽  
Nucleating Agents ◽  
Stress Strain ◽  
Orientation Degree ◽  
Relaxation Stress

Effect of nucleation agentboth on the toughness and the orientation of PET were studied. Rapid nucleationof melted PET caused by nucleating agent resulted in the decrease in grain sizeand it can improved the toughness of the PET. Both the elongation and the areaunder stress-strain curves of the PET strapping band increased significantly.Among these agents, 0.5wt% Aclyn is the most effective for elongation increaseand the tensile strength is not changed for PET/Aclyn strapping bands. Both thedecrease in orientation degree and the increase in crystallinity were observedafter adding nucleating agents in PET strapping bands. The increase in theresidual ratio of the relaxation stress with the increase of the crystallinity proved that the crystallization could inhibits thedevelopment of the stress relaxation.

Study of maximum tensile strength of fancy yarns using the design of experiments

2019 ◽  
Vol 20 (4) ◽  
pp. 403 ◽  
Author(s):  
Malek Alshukur ◽  
Alex Fotheringham
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Maximum Load ◽  
Cotton Yarn ◽  
Core Component ◽  
Structure Quality ◽  
The Core ◽  
Relative Contribution ◽  
Low Levels ◽  
Fancy Yarns

This study was conducted to identify the factors and the interactions which affect the maximum load of multi-thread fancy yarns. The objectives of this research was to identify the relative contribution of each factor and interaction leading to the maximisation of the tensile strength. The fancy yarns were made on a hollow-spindle spinning machine. The experimental design of this study had seven factors – with two levels each and was repeated five times. It was found that using two single yarns, instead of a similar two-ply yarn, for the core component increased the value of maximum load. The effect component contributed positively to the load only when it was a three-ply cotton yarn rather than a three-ply bamboo yarn since the former had interactions with the core and the binder. Excessive wraps reduced the maximum load. The effect of the overfeed ratio on the maximum load was weak. The manufacturing process in general had low levels of variability. This research is important because it contributes to a broader understanding to the effect of seven factors on the structure, quality, and mechanical properties of multi-thread fancy yarn.

scholarly journals Mechanical Properties and Tensile Fatigue of Graphene Nanoplatelets Reinforced Polymer Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Ming-Yuan Shen ◽  
Tung-Yu Chang ◽  
Tsung-Han Hsieh ◽  
Yi-Luen Li ◽  
Chin-Lung Chiang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Fatigue Life ◽  
Carbon Fiber ◽  
Ultimate Tensile Strength ◽  
Composite Laminates ◽  
Epoxy Composite ◽  
Fiber Composite ◽  
Graphene Nanoplatelets ◽  
Carbon Fiber Composite

Graphene nanoplatelets (GNPs) are novel nanofillers possessing attractive characteristics, including robust compatibility with most polymers, high absolute strength, and cost effectiveness. In this study, GNPs were used to reinforce epoxy composite and epoxy/carbon fiber composite laminates to enhance their mechanical properties. The mechanical properties of GNPs/epoxy nanocomposite, such as ultimate tensile strength and flexure properties, were investigated. The fatigue life of epoxy/carbon fiber composite laminate with GPs-added 0.25 wt% was increased over that of neat laminates at all levels of cyclic stress. Consequently, significant improvement in the mechanical properties of ultimate tensile strength, flexure, and fatigue life was attained for these epoxy resin composites and carbon fiber-reinforced epoxy composite laminates.

Property Evaluation of PET Fiber and Metal Fiber Composite Woven Fabric

2013 ◽  
Vol 365-366 ◽  
pp. 1086-1089
Author(s):  
Yuan Jen Chang ◽  
Bing Chiuan Shiu ◽  
Jia Horng Lin ◽  
Ching Wen Lou
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Water Absorption ◽  
Electrical Conduction ◽  
Fiber Composite ◽  
Woven Fabric ◽  
Static Electricity ◽  
Metal Fiber ◽  
Property Evaluation ◽  
Absorption Percentage

This study aims to fabricate strong mechanical properties and electrical conduction woven fabric, which provides flexible and strength for application. Polyethylene Terephthalate fiber (PET fiber) having fine mechanical properties are widely used in industry, as well as metal fiber are often used on electromagnetic shielding and static electricity protection. This study took both advantages of PET fiber and metal fiber for water sensitive functional textile. The result showed that warp yarns has a tensile strength of 1363.3N/mm and weft yarns has a tensile strength of 1483.3N/mm. In addition, both textiles with 20 wt% water absorption can be electrical conduction. Various metal yarns have different electrical resistivity and conductivity with various water absorption percentage.

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