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Volume 42, Issue 3-4
Displaying 1-6 of 6 articles from this issue
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Part II: Application of the Design LogicTatsuki Matsuo, M.N. Suresh1996 Volume 42 Issue 3-4 Pages 57-65
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSIn part I, the concept of Fiber Assembly Structure Engineering' (FASE) was proposed with the fundamental design logic for textile products. This paper describes the design procedures which have been practically implemented for two different areas of textiles; fiber-fill for kake-futon and absorptive unit using activated carbon fiber. Also system analysis has been conducted from the view point of design logic for other two different areas of textiles such as Shingosen and composite parts.View full abstractDownload PDF (1120K) -
Kiyoichi Matsumoto, Wan-Soo Kim, Kwang-Bae Lee1996 Volume 42 Issue 3-4 Pages 66-71
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSThis paper reports on the tensile toughness of various fibers calculated using the calculated using the stress-strain curves published already. The influence of tensile test conditions such as strain rate, temperature and humidity on their tensile toughness have been analyzed.
As a result, it was concluded that the testing environment as well as the strain rate did significantly affect the tensile toughness. The evaluation of properties using tensile toughness of each fiber showed different with it of tensile strength and elongation for the fibers. Thus, we proposed that the tensile properties of a fiber should be evaluated not only by strength and elongation, but also by toughness.View full abstractDownload PDF (773K) -
Masaru Nakazawa, Kenji Ishikawa, Shingo Nakamura, Takashi Kawamura, Hi ...1996 Volume 42 Issue 3-4 Pages 72-79
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSSome experiments were carried out on Japanese throstle spinning (Garabo)to make clear the mechanism of spinning, especially of self-operated control of yarn thickness. Several factors of spinning such as the equivalent pot weight which determines the control value of yarn tension, the packing density of top in the pot, the winding speed of yarn spun, the rotational speed of pot, were selected as essential factors and their effects on the thickness and the twisting rate of yarn were examined by a test Garabo machine with measuring apparatus developed. Experimental results show that there exists in Garabo system a kind of self-operated control mechanism on yarn thickness, and this mechanism makes possible to form considerably good evenness of yarn in spite of rather simple machine mechanism. We propose the qualitative model of the control mechanism and explain some curious effects of certain factors.View full abstractDownload PDF (1055K) -
Part 1: Velocity Distribution of Air Jet from Commercial Sub-nozzlesRyuji Shintani, Ikuei Donjou, Kazuhide Chikaoka, Atsushi Okajima1996 Volume 42 Issue 3-4 Pages 80-85
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSIt is important to improve the performance of sub-nozzles used in air jet looms for energy saving. In this paper, the velocity distribution of jet flow from the present type sub-nozzles are discussed.
At the present investigation four kinds of commercial sub-nozzles with different shapes, such as circular, porous, rectangular and elliptic are employed. It is found that despite of different nozzle shapes the jet velocity distribution from the sub-nozzles shows similar trend to that of the axisymmetric jet from circular tube nozzle. Due to the jet angle is varied by the air pressure supplied, it is necessary to adjust the set-up angle and position of the sub-nozzle according to the air pressure. From the results obtained, it is seen that the performance of the porous sub-nozzle is the best among the nozzles employed.View full abstractDownload PDF (860K) -
Masayuki Takatera, Akira Shinohara1996 Volume 42 Issue 3-4 Pages 86-92
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSAn aspect is presented to analyze the interrelation among the conventional tests of the bending rigidity of textile fabrics, such as cantilever, Clark, heart-loop methods, etc., which enables it to compare and estimate the errors and applicable ranges of these methods. A strip of fabric is simulated by an elastic slender body that has the same rigidity, density, and geometry, and its bending behavior of fabric is numerically solved as the problem of an elastics deformed under gravity. For each test method, the results obtained are expressed as the relationships between the related geometric parameters observed by experiment and a dimensionless parameter that is defined as the ratio of the sample length to the bending length. For practical convenience, the third order polynomial approximation is also given for each of these relations. The bending behavior thus predicted coincides well with the experimental one for many sample fabrics in every traditional method.View full abstractDownload PDF (1142K) -
Masayuki Takatera, Akira Shinohara1996 Volume 42 Issue 3-4 Pages 93-100
Published: 1996
Released on J-STAGE: October 24, 2006
JOURNAL FREE ACCESSA new method was developed for moire measurement of in-plane deformation of yarns composing a textile fabric and the applicability of the method was discussed. In this method, the moire fringe is approximated by a function group, then the specimen curves can be obtained as a function group. Spline function was used individually for approximation of moire fringe and gave good approximation. If the approximation error was sufficiently small, the estimated specimen curves also gave a good approximation. We can know the deformation of each yarn with the global distribution of the deformation and this method is applied for the measurement of deformation of yarns in notched fabrics under tension. This method can be widely applied for various moire measurements of complicated specimen deformation.View full abstractDownload PDF (1325K)
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