Last edited by Mautaxe
Wednesday, October 14, 2020 | History

2 edition of tensile behavior of two-ply yarns. found in the catalog.

tensile behavior of two-ply yarns.

G.A Carnaby

tensile behavior of two-ply yarns.

by G.A Carnaby

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  • 20 Currently reading

Published by WRONZ in Christchurch .
Written in English


Edition Notes

SeriesWRONZ communication -- no.C90
ContributionsWool Research Organisation of New Zealand.
ID Numbers
Open LibraryOL13716586M

spun yarns considering also random character of fiber inclination in the yarn. The real fiber stress-strain function, yarn twist, yarn diameter, and fiber orientation parameter are required for solution of this model which can be determined experimentally. The numerical integration was used to solve this equation. This was explained by the enhancement in bonding due to the mechanical anchoring provided by the non-linear geometry of the individual yarn within the fabric. The paper investigates the tensile behavior of textile reinforced mortar as influenced by different geometrical reinforcement ratio .

yarns were studied in number of works, for example, []. Huang et al. [4] derived a mathematical model for prediction of ply-yarn strength in relation to the twist coefficient using the single yarn radius, the twist angle, the tensile strain, the cohesion coefficient, the tensile modulus and shear modulus of the single yarn. Required Cookies & Technologies. Some of the technologies we use are necessary for critical functions like security and site integrity, account authentication, security and privacy preferences, internal site usage and maintenance data, and to make the site work correctly for browsing and transactions.

The static and dynamic mechanical performances of notched and un-notched 3D braided composites were studied. The effect of longitudinal laid-in yarn was investigated in comparison with low braiding angle composites. The specimens were fatigue tested for up to millions of cycles, and the residual strength of the samples that survived millions of cycles was tested. The cross-section of the 3D.   A novel finite-element method model is proposed according to the plain weave structure and the tensile parameters of the yarn and is found to properly simulate the uniaxial tensile behavior of the envelope. Future work may focus on an extensive application of the model for fields such as biaxial tensile performance.


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Tensile behavior of two-ply yarns by G.A Carnaby Download PDF EPUB FB2

It is considered that the strength of the ply yarn consisting of continuous filaments mainly depends on the properties of the single yarn and the cohesion forces among the single yarns, thus a mathematical model with relatively few parameters under given assumptions is established to predict the tensile strength of a two-ply yarn from single filament by: 1.

While two‐ply yarns showed an improvement in tenacity that was less pronounced in tensile behavior of two-ply yarns. book counts, single yarns always showed a fall in tenacity. Various properties of the treated yarns like packing fraction, fiber and yarn orientation, cross‐sectional morphology, etc.

were evaluated to ascertain the likely factors responsible for the Cited by: 2. The tensile properties of spun yarn are accepted as one of the most important parameters for assessment of yarn quality.

The tensile properties decide the performance of post spinning operations Author: Biswa RANJAN Das. That model focused on yarn twist angle’s effect on tensile modulus and stress–strain relations of composites, which was based on the widely used rule of mixtures, classical laminate theory, and revised Krenchel orientation efficiency factor cos 2 2θ (θ is the surface twist angle of fiber yarns).Author: Yong-Ping Li, Yan Li.

Analysis of tensile strength properties. // 3-D Textile Reinforcements in Composite Materials;, p The article analyzes the tensile strength properties of knitted fabric composites. The knitted fabric composites' failure The yarn bundles bridging the fracture plane.

Fig Elastic behavior of elastomeric yarn Fig Tensile test on two-ply yarn standard is applicable to all elasto-meric filament yarns that have more than % elongation.

Tests on elastomeric yarns are not performed up to break, but between defined strain limits. The test is displayed in a typical force-strain diagram and elongation. This study analyzes the mechanical properties of copper-covered polyester yarns.

This orientation of hybrid cover yarns is far much superior in terms of the yarn’s tensile properties with around fourfold increase in the tenacity values and around 30–70% reduction in modulus values. The importance of different cuticle scale properties and the presence of medulla on fiber properties such as lustre and friction, textile manufacturing especially dehairing, and textile quality are described.

Tensile properties of raw fiber, dehaired slivers, tops, yarns, and fabrics are summarized particularly for mohair, cashmere, and alpaca. Minimum five samples of mm length have been used to measure yarn crimp measurement for every yarn. Measurement of Tensile Strength and Modulus: Tensile strength and modulus of 3D woven fabric samples were determined in accordance with British Standard BS EN ISO on a Zwick Instron testing machine with a load cell capacity of 10KN.

According to this standard, the test is used to evaluate the elastic behavior of monofilaments of elastofibers by repeated tensile load between constant offset yields.

This standard is applicable to all filament yarns made from elastic yarn that have more than % elongation. same behavior in two-ply double helix yarns would be amenable to generating the high tensile strokes during volume expansion as described above, and was the motivation for the present study.

Experimental evaluation of the model pre-dictions was performed on prototype double. Two-ply yarn, PA6 2×7. f18×2. The book first reviews properties such as fineness, length and density. This study focuses on the effect of strand spacing on the tensile behavior of tri.

In this chapter two continuous models, which are based on a geometric transformation approach and an energy approach, respectively, for analyzing the. The same behavior in two‐ply double helix yarns would be amenable to generating the high tensile strokes during volume expansion as described above, and was the motivation for the present study.

Experimental evaluation of the model predictions was performed on prototype double helix actuators constructed from readily available materials, as. The yarn stiffness in one set during weaving will influence the bending behavior of the yarn in the other sets.

When two yarns from two sets meet to interlace, it is the flexible one, which bends more. Furthermore, the paths of the yarn in the fabric is another factor which controls the yarn. Behavior of technical filament yarns in dynamic tensile test September Conference: 14th Romanian Textiles and Leather Conference [and] 46th International Federation of Knitting Technologists.

Determining Mechanical Properties of Yarns and Two-Ply Cords from Single-Filament Data David A. Zimliki, John M. Kennedy, Douglas E. Hirt, and Glen P. Reese Textile Research Journal.

The present study aims at understanding the influence of the distribution of yarn interlacement on uniaxial tensile behavior of woven fabrics. The % cotton woven fabrics in two constructions, 3/1 twill and four-end satinette, differing only in the interlacement pattern were explored, so that the differences, if any, between the tensile.

G.K. Tyagi, in Advances in Yarn Spinning Technology, Air-jet spun yarns. Ply-twisting has a beneficial effect on the tensile characteristics of air-jet spun yarns and it is only necessary to use 60–70% of the ply-twist which would be needed for ring spun yarns of equivalent counts.

Tenacity increases and rigidity decreases for ply-twist when twisting is in the opposite direction. The tensile properties of composite yarns mainly depend on the tensile properties of the filaments, and their tenacity is higher than that of two-ply wool/PET staple fiber yams.

Request PDF | Tensile behavior of staple fiber yarns part I: theoretical models | In this work, an attempt is made to create theoretical models on tensile behavior of staple fiber yarns and verify.Tensile behavior. Experimental: Tensile behavior of as-prepared t-ECCYs was measured using a XL-1A tensile tester.

Forty replicates, at a gauge length of mm, test speed of mm/min and a pretension of cN/tex were measured per sample according to China standard GB/T The objective of this research is to construct a computer model that can predict the properties of flat yams, twisted yams, and twisted cords from single-filament data.

In this model, a modulus ver.