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研究生:吳浚邑
論文名稱:單向性複合材料之溫濕效應及潛變行為
論文名稱(外文):The Effects of Hygrothermal Effect and Creep Behavior of Unidirectional Carbon Fiber Composite Materials
指導教授:丁大文
學位類別:碩士
校院名稱:逢甲大學
系所名稱:紡織工程學系
學門:工程學門
學類:紡織工程學類
論文種類:學術論文
論文出版年:2000
畢業學年度:88
語文別:中文
中文關鍵詞:溫濕效應濕膨脹熱膨脹潛變
外文關鍵詞:hygrothermal effecthygroscopic expansionthermal expansioncreep behavior
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本文是以實驗之方法,探討溫濕效應及潛變行為對單向性碳纖維複合材料積層板機械性質之影響。
首先,以電阻應變計量測技術,量測單向複合材料積層板受溫度影響後的熱膨脹係數,由實驗結果發現單向複合材料積層板之軸向熱膨脹係數比橫向膨脹係數小許多,且熱膨脹係數與溫度並非呈一線性關係。
對於單向複合材料積層板的吸濕現象,發現單向複合材料積層板之軸向濕應變幾乎為零,而橫向濕應變則與含水率呈一線性關係。而單向複合材料之橫向濕膨脹係數,以熱塑性複合材料C/NY值為最大,顯示其受濕氣影響很大,材料尺寸安定性不高。
對於單向複合材料積層板在飽和吸濕後的潛變行為上,本文亦作了一完整的探討。由實驗結果得知,隨著實驗溫度的增加,其潛變行為隨之明顯的增加,並將實驗結果配合時間-溫度重疊原理及Findley Equation建立個別的潛變主曲線(Master Curve),以用來預估單向複合材料積層板在長時間承受負荷後的潛變行為。

An experimental work is conducted to understand the effects of hygrothermal effect and creep behavior on the mechanical behavior of unidirectional carbon-fiber composite materials .
The thermal expansion coefficients of unidirectional carbon-fiber composite laminates are measured by using the strain gage.The thermal expansion coefficients in transverse direction of unidirectional composites is much greater than in fiber direction .
It is found that in the unidirectional composites, the swelling strain in fiber direction is very small, while the swelling strain in transverse direction is increased with the time.The hygroscopic expansion of thermoplastic(C/NY) composite shows the largest value.
In the present study,a systematic investigation of creep behavior of unidirectional composite laminates was conducted.The creep strains increased with the elevated temperature,and the experimental results was shifted to a reference temperature to form various master curves by using the time- temperature superposition principle.The master curves fitted with Findley equation could be used to predict the creep behavior of unidirectional carbon-fiber composites of longer duration .

目錄
摘要‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ Ⅰ
英文摘要‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ Ⅱ
目錄 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ ‧ Ⅲ
表目錄‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ Ⅴ
圖目錄‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ Ⅵ
符號說明‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ Ⅸ
第一章 簡介 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 1
1.1 前言 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 1
1.2 研究動機及其目的 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 3
1.3 文獻回顧 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 5
第二章 基本理論 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 7
2.1 複合材料積層板的熱膨脹係數 ‧‧‧‧‧‧‧‧‧‧‧‧ 7
2.2 複合材料積層板的吸濕理論 ‧‧‧‧‧‧‧‧‧‧‧‧‧ 7
2.3 複合材料的溫濕效應 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 8
2.4 複合材料之潛變行為 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 8
2.4.1 概述‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 8
2.4.2 影響潛變行為之因素 ‧‧‧‧‧‧‧‧ ‧‧ 9
2.4.3 潛變行為之圖形 ‧‧‧‧‧‧‧‧‧‧‧‧ 12
2.4.4 潛變與時間之關係模數 ‧‧‧‧‧‧‧‧‧ 13
2.5 時間-溫度重疊原理 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 14
2.6 Findley Equation ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 19
第三章 實驗‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 20
3.1 實驗材料 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 20
3.1.1 試片之固化處理 ‧‧‧‧‧‧‧‧‧‧‧‧ 20
3.1.2 試片之尺寸 ‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 21
3.1.3 試片之絕乾過程 ‧‧‧‧‧‧‧‧‧‧‧‧ 22
3.2 實驗儀器‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 22
3.3 應變計之選擇‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 23
3.4 應變計之黏貼法‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 24
3.5 應變計之修正‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 25
3.6 應變計之保護‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 28
3.7 實驗項目‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 28
3.7.1 單向複合材料積層板絕乾時之熱膨脹實驗 ‧ 28
3.7.2 單向複合材料積層板浸於水中之濕膨脹實驗 29
3.7.3 單向複合材料積層板於飽和吸濕下之潛變實驗 29
3.8 實驗流程‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 31
第四章 結果與討論‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ ‧ 34
4.1 單向複合材料積層板絕乾時之熱膨脹係數探討‧‧‧‧‧ 34
4.2 單向複合材料積層板浸於水中之濕膨脹探討‧‧‧‧‧‧ 39
4.3 單向複合材料積層板於飽和吸濕下之潛變行為探討‧‧‧ 46
4.3.1 潛變行為與溫度之關係 ‧‧‧‧‧‧‧‧‧ 46
4.3.2 以時間-溫度重疊原理建立潛變主曲線 ‧ ‧ 49
4.3.3 以Findley Equation建立潛變近似曲線 ‧ 52
第五章 結論‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 62
參考文獻‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧‧ 64

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