Journal of the Textile Machinery Society of Japan

Mechanical Properties of Synthetic Fibers at Low Temperature

Seinosuke Kakiage, Kohji Yamaga, Tetsuyuki Sasai

1968 Volume 14 Issue 6 Pages 191-195
Published: 1968
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.14.191

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We have built a low-temperature tensile tester and used it in a test of the tensile stlength, breaking elongation and toughness of synthetic fibers.
The strength and elongation curves of synthetic fibers at a temperature of -50°C- +70°C can be expressed by a quadratic curve for strength-temperature and by a nearly straight line for elongation-temperature.
The products of these two equations can be expressed, by a cubic curve, as a function of the work of rupture versus temperature. Generally, they have optimum and minimum values.
The cubic equation deduced from these two equations almost coincides with experimental results.
The optimum value of a nylon fiber is obtainable at a temperature of about -20°C. The work of rupture of 70d nylon yarn, 15cm in gauge length, is expressible by the following equation:
W₂=9.7×10^-3T³-7.95T²+2150T-191000 where W₂: work of rupture (g.cm) T: absolute temperature (°K)

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Mechanical Properties Related to the Handle of Heavy Fabrics

Shinichi Kitazawa, Kozo Susami

1968 Volume 14 Issue 6 Pages 196-203
Published: 1968
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.14.196

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Some fundamental properties of heavy fabrics-bending, shearing, stretching, compression, etc.-were measured and then calculated to make a matrix and a vector indicating a pattern of such properties of heavy fabrics.
This pattern has been found capable of differentiating between woollen and other fabrics in terms of characteristics concerning mechanical properties. A mechanical behavior related to fabric handle is believed to be almost completely covered by the properties measured in our experiment under review. It is, therefore, possible to correlate the mechanical properties of fabrics to their handle. Discussion of the surface characteristics of fabrics is omitted from this article.

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Abrasion of Fabrics

Motozi Kawamura, Sakio Ikeda

1968 Volume 14 Issue 6 Pages 204-214
Published: 1968
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.14.204

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Mechanical Properties of Fiber Reinforced Plastics

Part 2: Elastic Anisotropy of FRP Reinforced with Glass Cloth

Matsuo Maeda, Kenji Tanaka, Katsuji Kakei

1968 Volume 14 Issue 6 Pages 215-222
Published: 1968
Released on J-STAGE: October 24, 2006

DOIhttps://doi.org/10.4188/jte1955.14.215

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We have investigated the effect of the laminating structure of glass cloth on the elastic anisotroly of FRP in which plain-woven glass cloth is embedded. The relationship between the manner of piling up glass cloth and the elastic anisotropy of FRP has been analyzed by using a mechanical model. The major results of our research are:
A)The elastic anisotropy of FRP may disappear if equal numbers of sheets of cloth (a) (plainweave glass cloth) and cloth (b) (the same as cloth (a) but rotated 45°) are embedded.
B) For FRP in which many sheets of glass cloth oriented parallel with one another are embedded, Young's modulus gets a maximum value in the directions of warp and weft of the cloth and declines to a minimum in the center direction.
C) Placing cloth (b) on top of cloth (a) reduces Young's modulus in the yarn direction of cloth (a) in FRP, if sheets of cloth (a) and (b) to the number n each (2n sheets in all) are embedded, Young's modulus declines to 80% of that where 2n sheets of cloth (a) only are embedded.

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