繊維の圧縮特性に関する研究(第 34 報) : 単独繊維塊の外圧と空隙率の関係線図における履歴現象を主とする物理的要因の解明 : 正の温度領域

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The purpose of the research in this paper is to make clear physical chief factors and the relation between pressure and percentage of porosity in hysteresis on the compressional behaviour of fibres in case of each single fibre's lump. As physical chief factors on the compressional behaviour of fibres is following, total porosity percentage, porosity percentage in that time begin an experiment Do(%), total compression D(%), elastic compression or compressive elasticity Dc(%), residual compression Dp(%), degree of compressional resilience or compressive elastic degree Dc/D(%), compressive percentage or compressional percentage D/Do(%), total quantity of energy A+B (cm^2), quantity of plastic energy A (cm^2), quantity of elastic energy B (cm^2), degree of elasticity into compressional energy B/A+B(%), permanent deformation Do-D_1/Do(%)=Dp/Do(%), elastic after effect I_1∿I_3(%), porosity percentage ε(%), ε(%)=(Do-D)%, compressional curve Io∿I, recovery curve I∿I_1,pressure P (kg/cm^2), percentage of critical porosity in theory ε'(%). Also, as the single fibre's lump of the test piece in this experiment is following. Namely, Viscose Rayon (Crimped Dull) 3 deniers×76 m/m, Nylon 3 deniers×70 m/m and Beslon 3 deniers×55 m/m have been used. The arrangement of all these fibres is case of nonparallel in direction of single fibre's arrangement. As the range of temperature in this experiment set within the limits from 10℃ to 80℃. And this experiment was tried by steps of 10℃ of temperature each. Also, all of these fibres is not straight filament, but crimped fibre. This experiment is to examine physical chief factors on the compressional behaviour of hysteresis in these single fibre's lump by the aid of improved equipment, trial manufactured equipment in a series of this paper, registered as Patent Number 486847 in Japanese Patent Office. The experiment of this thesis is tried under the pressure from 0 (kg/cm^2) to 5 (kg/cm^2) at the each stages of the increase and decrease in pressure. The author concentrated special attention on the increase and decrease of pressure from 0 (kg/cm^2) to 0.05 (kg/cm^2). As the number of times in hysteresis is from the first time to the fifth time in the increasing and decreasing pressure. The results of these experiments of single fibre's lump was investigated through the relation that is made by following each graph. Namely, P∿ε curve is a relative curve between pressure P (kg/cm^2) and porosity percentage ε(%) in that time of each step from 10℃ to 80℃ in temperature through the test pieces, Viscose Rayon (Crimped Dull), Nylon and Beslon. The theoretical equation of porosity percentage ε(%) and percentage of critical porosity in theory ε'(%) under pressure P is following, ε(%)=(Vo-ΔVp-Vf)/(Vo-ΔVp)×100(%)=(Vp-Vf)/Vp×100(%)=(1-Vf/Vp)×100(%) also, ε'(%)=Vf/Vo×100(%) but, ΔVp (cm^3)=πr^2・ℓ(cm^3) Here, Vo (cm^3) represents the volume of fibre under the pressure P=O (kg/cm^2) at the moment : ΔVp (cm^3), discharged air quantity under the pressure P (kg/cm^2) at the moment : Vf (cm^3), real volume of fibre Vf=Wf/δf (cm^3) : δf (g/cm^3), specific gravity of fibre : VP (cm^3), volume of fibre under the pressure P (kg/cm^2) at the moment : r (mm), radius of hole of glass capillary tube : ℓ (cm), displaced length of column of mercury into the glass capillary tube. In this experiment, compressional curve Io∿I and recovery curve I∿I_1 between pressure P (kg/cm^2) and porosity percentage ε(%) have been used. And as the number of times in hysteresis adopted case of from the first time, I to the fifth time, V in the increasing and decreasing pressure. Quantitative measurement of fibre is not easy to conduct chiefly because of its indifinite shape. The important condition required for the apparatus is ever to exactly record the changes of stress in hysteresis imposed on the single fibre and single fibre's lump. Before the experiment, the author made control of s
1999-03-20

著者

寺島功
金城学院大学

繊維の圧縮特性に関する研究(第 34 報) : 単独繊維塊の外圧と空隙率の関係線図における履歴現象を主とする物理的要因の解明 : 正の温度領域

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