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題名 | 纖維排列方向對複合材料黏度的影響= |
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作者 | 邱文英; 謝國煌; 黃貴中; |
期刊 | 材料科學 |
出版日期 | 19910600 |
卷期 | 23:2 1991.06[民80.06] |
頁次 | 頁146-151 |
分類號 | 440.34 |
語文 | chi |
關鍵詞 | |
中文摘要 | 本文主要目的是探討纖維排列之力向性對於複合材料黏度的影響。理論 部分引用了G.K.Ratchelor(1,2)懸浮應力模型以及Amstrong等人的數學簡化模式 (3-5)。 本文將纖維做定向排列經計算結果發現:當切應力方向為YX,而纖維在X-Z平面 排列時(φ=0°),其θ角度之變化垃未引起黏度之變化。若將纖維平行x-z平面排 列(θ=90°),由角度之改變可引起黏度相當大的變化。但當φ=0°與90°時懸浮 流體黏度等於純流體黏度。 實驗部份似聚丙烯及玻璃纖維製成複合材料(纖維體積含率約為2.6),利用自行設 計的平板黏度計,在200℃下對5.56X10-�纂A7.78X10-�臚�1X10-��(1/sec)三種不同 切變率,各別對純聚丙烯及含θ角度為什纖維,45°纖維和90°纖維(纖維長度 4.8公分,且φ=0°)的複合材料作黏度測試。實驗結果與理論預期相符。即當φ =0°時θ角度的變化對複合材料的黏度不產生影響。 |
英文摘要 | In this article, we are interested in how fiber orientation affects the viscosity of polymericcomposite melts. In the theoretical part, we applied the G.K. Batchelor's(1,2) "non-dilute suspension bulkstress model" and the simplified mathematical equations by Amstrong et al.(3-5) to study the effect of unidirectional fiber-orientation on the viscosity of polymeric composites. It is found that if fibers lie onthe X-Z plane (φ = 0°) with shear stress τyx, the change of θ will not change the viscosity of suspension. And the viscosity of suspension equals to that of pure polymer. However, if fibers lie on the X-Y plane(θ = 90°), the variation of φ can induce the change of viscosity of suspension dramatically except forφ = 0° or φ = 90°. In the experimental part, we used polypropylene and glass fiber to maki- composite for testingmaterials. The volume concentration of fiber is about 2.6 and the viscosity is measured by Lab-madeplate-rheometer at 200℃. Three shear rates (5.56x10�荼�, 7.78x10�荼�, and 1x10�� (1/s)) are selected in themeasurement of stress-strain curves for PP and the composites of PP+0° fiber, PP+45° fiber, and PP+90° fiber (fiber length = 4.8 cm,φ= 0°). The experimental results confirm the theoretical prediction very well. The variation of ff in fibers will not change the viscosity of fluid in the case of <φ = 0°. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。