Weak-Link Effect on Tensile Properties of Cotton Yarns

Hussain, G.F.S.; Nachane, R. P.; Iyer, K. R. Krishna; Srinathan, B.

doi:10.1177/004051759006000202

Cited by 13 publications

(10 citation statements)

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“…This is in accordance with the earlier observations in cotton yarns. 2 The percentage extension at break also seems to follow a similar trend to that of the maximum load at break as shown in Table I. However, the extent of decrease is low compared with the maximum load.…”

Section: Tensile Properties Of Rectangular Specimens At Different Glssupporting

confidence: 65%

“…2 Previous studies presented a "weak link" theory as the probable mechanism for the decrease in tensile strength of cotton yarns and fibers with increase in the GL. [2][3][4][5][6][7] It was based on the presence of flaws on a system of chemical bonds. However, leather is a highly complicated system to apply such a chemical bonding-based theory alone.…”

Section: Plausible Reasons For the Decrease In Tensile Properties Of mentioning

confidence: 99%

“…1 Therefore, it is logical to expect a decrease in breaking load with an increase in gauge length (GL) due to the presence of weak links. 2 The probability of increase in weak spots or links increases with the increase in GL. Peirce 3 proposed the "chain weak link" theory based on the data of the breaking strength of 10 and 30 in.…”

Section: Introductionmentioning

confidence: 99%

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Gauge length effect on the tensile properties of leather

Thanikaivelan

Shelly

Ramkumar

2006

J of Applied Polymer Sci

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Tensile properties are important basic characteristics of materials and influence their end-use and performance. More importantly, in the case of leather due to end-use applications such as shoe uppers, automotive and furniture upholstery, mechanical properties such as tenacity are of extreme importance. Therefore, fundamental studies on the tensile properties of leather are needed. In this study, an attempt has been made to examine the effect of gauge length (GL) on the tensile properties of shoe upper leather. Two different specimens in the form of rectangular and dumbbell shapes have been cut from parallel and perpendicular directions to the body axis of the leather and have been tested. Results showed that the maximum breaking load and the percentage extension at break decreased with the increase in GL. Rectangular specimens showed a 30% decrease in maximum breaking load and a 13% decrease in percentage extension at break, while dumbbell specimens showed reductions in the order of 28 and 6%, respectively, as the GL increased from 9.53 cm to 23.5 cm. Highly varying supramolecular architecture of the collagen matrix and the frictional slippage caused by the free ends present in the collagen fibrils, which induce a weak-link effect similar to the one found in cotton fibers and yarns, are considered to be the probable reasons for this behavior. A limited scanning electron microscopic study has been undertaken to pictorially represent the breakage of leather at different GLs.

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Section: Tensile Properties Of Rectangular Specimens At Different Glssupporting

confidence: 65%

Section: Plausible Reasons For the Decrease In Tensile Properties Of mentioning

confidence: 99%

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Gauge length effect on the tensile properties of leather

Thanikaivelan

Shelly

Ramkumar

2006

J of Applied Polymer Sci

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“…Tensile characteristics of the t-ECCY at different extension rates and gauge lengths are summarized in Table 2, which facilitates a quantitative analysis. Table 2 clearly shows that tensile characteristics, that is, the breaking tenacity and elongation, of the t-ECCY at a gauge length of 250 mm are superior to those of 500 mm, irrespective of the extension rate considered, mainly due to the well-known weakest-link theory, 5–7 since there is a higher probability of including a comparatively larger number of weak spots and a distribution of flaws of wide ranging magnitude in a longer specimen. As a whole, the CV% of yarn tenacity was greater at the gauge length of 250 mm than that at 500 mm.…”

Section: Resultsmentioning

confidence: 99%

Experimental evaluation and modified Weibull characterization of the tensile behavior of tri-component elastic-conductive composite yarn

Wang

2017

Textile Research Journal

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In order to clarify the effects of the extension rate and gauge length upon the distribution of tensile strength of tri-component elastic-conductive composite yarn (t-ECCY), experimental as well as theoretical studies have been performed in this paper. Influences of the extension rate and gauge length are highlighted. The yarn exhibits an extension-rate strengthening effect, and the higher extension rate results in a higher strength and fracture strain, irrespective of the gauge length considered, and vice versa. Expressed in terms of gauge length, yarn tenacity shows a drop for a longer testing length at all extension rates, based on the weakest-link theory. A modified two-parameter Weibull strength distribution model, taking into account the effects of extension rate and gauge length, can be reasonably used to quantify the degree of variability in tensile strength and to obtain the individual Weibull parameters for practical applications. Different fracture mechanisms of the t-ECCY are demonstrated at lower and higher extension rates. A “cascade-like” break happens at lower extension rates due to inner sliding, weaker interactive transverse force of individual fibers, and sufficient time available for the fiber realignment. Nevertheless, a “chimney-like” break dominates at higher extension rates by virtue of the reduced reorientation of some disordered fibers and intensive instant impact force of the stainless steel filament component along the load direction.

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“…The length effect, which they expressed as a ratio between the tenacity of a given gauge and that of a 1 cm length, shows no difference between ring versus rotor spun yarns at relatively short lengths. However, the difference is statistically significant at long lengths (Hussain et al, 1990). …”

Section: Static Tensile Behaviour Of Staple Yarnsmentioning

confidence: 90%

Static and Dynamic Tensile Behaviour of Spun Yarns: A Critical Review

Das¹,

Ishtiaque²,

Rengasamy³

2011

Research Journal of Textile and Apparel

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The tensile properties of spun yarns are accepted as one of the most important parameters for the assessment of yarn quality. Tensile properties contribute to the performance of post spinning operations; warping, weaving and knitting, hence their accurate technical evaluation carries much importance in industrial applications. This article presents a novel approach of classification of tensile properties into static and dynamic, based on the disposition of yarns during tensile testing. The definition of dynamic tensile properties and instruments utilized for their assessment are briefly discussed. Several theoretical and experimental work pursued on the static and dynamic tensile properties of ring, rotor, air-jet and friction spun staple yarns are critically reviewed. The article also throws light on the significance of exploitation of spun yarn dynamic tensile properties in industrial applications. The various material, spinning and testing parameters that influence static and dynamic tensile properties are summarized. The reported empirical equivalence of static and dynamic yarn strength of spun yarns is revealed. Current research work in the thrust area of spun yarns that are subjected to dynamic conditions is introduced.

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Weak-Link Effect on Tensile Properties of Cotton Yarns

Cited by 13 publications

References 0 publications

Gauge length effect on the tensile properties of leather

Gauge length effect on the tensile properties of leather

Experimental evaluation and modified Weibull characterization of the tensile behavior of tri-component elastic-conductive composite yarn

Static and Dynamic Tensile Behaviour of Spun Yarns: A Critical Review

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