研究生: |
彭智平 Chih-Ping Peng |
---|---|
論文名稱: |
熱 壓 修補對受溫度及濕 度 影響後之Gr/PEEK複 合材料軸 向壓應力及疲勞強度之研究 |
指導教授: |
葉銘泉
Ming-Chen 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: | 75 |
中文關鍵詞: | 壓縮 、拉伸-壓縮疲勞 |
外文關鍵詞: | compression, fatigue |
相關次數: | 點閱:2 下載:0 |
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本篇論文旨在探討溫度與濕度效應對擬均向性碳纖維強化聚醚醚酮(Gr/PEEK)複合材料之在熱壓修補前後,對其壓縮強度與拉伸-壓縮疲勞性質之影響。
在本論文的實驗部份將對Gr/PEEK複合材料作應力比(stress ratio)-0.1、疲勞頻率為3Hz之拉伸-壓縮疲勞,根據數據作curve fitting得到材料的疲勞壽命曲線,用以決定往後實驗所施加的預疲勞週次數,並對其擬靜態壓縮強度作修補前後的比較;同時在預疲勞後及修補後輔以C-Scan超音波非破壞性檢測法對試片內部的情形作一了解。
實驗結果發現受高濕度環境影響下之試片,其拉伸及壓縮強度均較其他環境因素為低,而高溫環境下的試片強度則有上升的趨勢,若兩者相比較,我們發現濕度對材料的影響較溫度對材料的影響為大;經過預疲勞後的壓縮應力也因基材劣縫的出現使基材強度降低的事實而隨之降低,經過熱壓修補後亦有一定程度的回升。
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