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研究生： 吳忠霖
Chung-Lin Wu
論文名稱： 具中心圓孔之Gr/PEEK複合材料積層板受濕度影響與預扭效應後在熱壓修補前後軸向拉伸疲勞壽命之研究
指導教授： 葉銘泉 博士
Dr. Ming-Chuen Yip
口試委員:
學位類別： 碩士
Master
系所名稱： 工學院 - 動力機械工程學系
Department of Power Mechanical Engineering
論文出版年： 2001
畢業學年度： 89
語文別： 中文
論文頁數： 77
中文關鍵詞： 預扭、疲勞、熱壓修補
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    • 本研究主要針對具中心圓孔之擬均向[0/45/90/-45]2s碳纖維強化聚醚醚酮(Gr/PEEK)複合材料積層板試片受濕度影響後探討其軸向拉伸及預扭軸向拉伸的靜態強度及疲勞壽命情形，並採熱壓修補方式修補受濕度影響之具中心圓孔複合材料積層板試片。在軸向拉伸的結果上發現熱壓修補並無改善其靜態強度及疲勞壽命，可能是因修補時試片尚含有濕氣，由於在高溫高壓環境下，濕氣膨脹造成基材劣化使試片受損；而在預扭軸向拉伸中，並無改善其靜態強度，但在疲勞壽命上確有改善。雖然如此，仍無法肯定熱壓修補確有良好效益，因預扭效應所造成實驗數據之散佈性較大。另比較軸向拉伸及預扭軸向拉伸實驗結果，發現受預扭影響後，雖然在靜態強度上並無大幅影響，但在材料疲勞壽命方面，明顯已造成壽命之衰減。

    摘 要 符號說明………………………………………………………………..Ⅳ 表目錄…………………………………………………………………..Ⅴ 圖目錄…………………………………………………………………..Ⅵ 一、前言…………………………………………………………………1 二、文獻回顧……………………………………………………………3 2.1 疲勞…………………………………………………………………3 2.2 複合材料的損傷機制………………………………………………3 2.3 複合材料的疲勞性質研究…………………………………………5 2.4 應力等級對疲勞性質的影響………………………………………6 2.4.1 應力(S)與破壞週次(Nf)的關係 2.5 具圓孔之複合材料特性……………………………………………7 2.5.1 靜態性質 2.5.2 疲勞性質 2.5.3 殘餘強度 2.6 複合材料受濕度的影響……………………………………………9 2.6.1 機械性質的影響 2.7 複合材料受扭轉的影響……………………………………………11 2.7.1 損傷機制 2.7.2 靜態性質 2.7.3 疲勞性質 2.7.4 殘餘強度和模數衰減 2.8 修補…………………………………………………………………14 2.8.1 溫、濕度對修補的影響 三、實驗內容及程序……………………………………………………17 3.1儀器簡介……………………………………………………………17 3.1-1 Instron-1322型萬能試驗機 3.1-2熱壓機 3.1-3 C-scan超音波系統 3.1-4 鑽石切割機 3.1-5 桌上型恆溫恆濕試驗機 3.1-6 噴砂機 3.1-7 鑽孔機 3.2 試片製作及檢測…………………………………………………21 3.3 實驗程序及方法…………………………………………………22 3.3.1 靜態軸向拉伸試驗 3.3.2 靜態扭轉試驗 3.3.3 軸向拉伸疲勞試驗 3.3.4 預扭軸向拉伸疲勞試驗 3.3.5 試片修補方法 3-4 預估試片數目……………………………………………………24 四、結果與討論………………………………………………………25 4.1 靜態扭轉試驗……………………………………………………25 4.2 靜態拉伸試驗……………………………………………………26 4.2.1原始試片靜態軸向拉伸試驗結果 4.2.2具圓孔試片靜態軸向拉伸試驗結果 4.3 預扭靜態拉伸試驗………………………………………………28 4.3.1 原始試片預扭靜態軸向拉伸試驗結果 4.3.2 具圓孔試片預扭靜態軸向拉伸試驗結果 4.4 軸向拉伸疲勞試驗………………………………………………29 4.4.1 原始試片軸向拉伸疲勞試驗結果 4.4.2 具圓孔試片軸向拉伸疲勞試驗結果 4.5 預扭軸向拉伸疲勞試驗…………………………………………33 4.5.1原始試片預扭軸向拉伸疲勞試驗結果 4.5.2具圓孔試片預扭軸向拉伸疲勞試驗結果 4.6 無預扭與預扭軸向拉伸疲勞試驗之比較………………………36 4.6.1 靜態拉伸試驗 4.6.2 軸向疲勞試驗 五、結 論……………………………………………………………38 六、參 考 文 獻……………………………………………………40

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