Evaluate tightness of loose fiber assembly by electrical resistance method |
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Authors: | Gaopeng Jia Zhaohuan Zhang Mu Yao |
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Institution: | (1) Faculty of Education, Shiga University, 2-5-1 Hiratsu, Otsu Shiga, 520-0862, Japan |
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Abstract: | A special compression device was devised to investigate the relation of resistivity and tightness of fiber assembly. The experimental
results show that resistivity of loose fiber assembly can reflect the tightness among fibers in fiber assembly, and also show
that tightness in cross-section horizontal to compression direction and that in cross-section vertical to compression direction
have difference. A new parameter defined as the degree of fiber orientation in loose fiber assembly is proposed to characterize
this difference. It can be expressed by that the degree of fiber orientation shows the 1/(3+C)th power dependence with respect
to the ratio of resistivity in compression direction to that in the direction vertical to compression direction. From the
experimental results, fiber orientation degree increases with increase of density of fiber assembly at the same fiber assembly
weight. It increases with the decrease of fiber assembly weight at the same density of fiber assembly. From experimental results,
parameter fiber orientation degree in loose fiber assembly and filling ratio can describe the compactness of loose fiber assembly
comprehensively. |
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Keywords: | |
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