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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 單秋成 | zh_TW |
| dc.contributor.advisor | Chow-Shing Shin | en |
| dc.contributor.author | 黃順亘 | zh_TW |
| dc.contributor.author | Shun-Hsuan Huang | en |
| dc.date.accessioned | 2024-08-09T16:13:32Z | - |
| dc.date.available | 2024-08-10 | - |
| dc.date.copyright | 2024-08-09 | - |
| dc.date.issued | 2024 | - |
| dc.date.submitted | 2024-08-01 | - |
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/93890 | - |
| dc.description.abstract | 膠合接口在複合材料結構中廣泛應用，與傳統連接方法相比有許多優點。然而，濕熱環境會導致搭接劑和複合材料性能劣化，使其連接機械性能變得不可預測。傳統非破壞檢驗技術（NDT）難以檢測出明顯缺陷形成前的膠合接口破壞情況。透過結構健康監測（SHM），可以監測試片在機械負載和環境影響下的劣化程度。
本研究將奈米碳管（CNT）摻入環氧樹脂搭接劑中，使碳纖維複合材料膠合接口具備導電性。為瞭解試片在正常乾燥環境中的疲勞破壞情況，設定在達到特定電壓變化百分比（2%、10%、18%）時進行螢光液滲透處理，以探討疲勞壽命、電壓變化百分比及破斷面破壞機制之間的關聯性。接著，對試片在濕熱環境中進行 30天和90 天的測試，並同時進行導電性監測，探討不同濕熱環境下的機械性質與監測電壓之間的相關性。最後，通過對破斷面的微觀觀察和監測數據的分析，探討電性與破壞之間的關聯性。 實驗結果顯示，電壓變化百分比與液滲脫層面積之間存在兩種趨勢，並通過微觀觀察揭示了這兩種趨勢的破壞機制。此外，在濕熱環境中的電壓監測結果顯示，電壓值隨時間增加，且與疲勞壽命有一定關聯性。高溫高濕條件下，複合材料基材和搭接劑均出現塑化現象，並存在由水分侵入引起的孔洞。 總體來說，本研究揭示了濕熱環境對複合材料結構的影響，並指出導電性監測與機械性質之間的關聯。這對理解複合材料在特定環境條件下的性能變化至關重要。然而，仍需進一步研究以解釋濕熱老化、導電性和機械性質之間的複雜關係，以提高對複合材料結構性能的預測和控制。 | zh_TW |
| dc.description.abstract | Adhesive joints are widely used in composite material structures and offer many advantages compared to traditional connection methods. However, hygrothermal environments can degrade the performance of the adhesive and composite materials, making the mechanical properties of the joints unpredictable. Traditional non-destructive testing (NDT) techniques have difficulty detecting adhesive joint failures before significant defects form. Structural health monitoring (SHM) can monitor the degradation of specimens under mechanical loads and environmental impacts.
This study incorporates carbon nanotubes (CNTs) into epoxy adhesives to create conductive adhesive joints in carbon fiber composites. To understand the failure behavior of the specimens under fatigue loads in dry environment, the study used liquid fluorescent penetrant treatment at specific voltage change percentages (2%, 10%, 18%) to explore the relationship between fatigue life, voltage change percentage, and failure mechanisms of the fracture surface. Subsequently, the specimens were tested in hygrothermal environments for 30 and 90 days while monitoring conductivity to investigate the correlation between mechanical properties and monitored voltage under different environmental conditions. Finally, microscopic observations of the fracture surfaces and analysis of the electrical trends during monitoring were conducted to explore the relationship between electrical properties and failure. The experimental results show two trends between the voltage change percentage and the area of liquid penetration delamination, and microscopic observations revealed the failure mechanisms for these trends. Additionally, voltage monitoring in the hygrothermal environment showed that voltage values increased over time and correlated with fatigue life. Further microscopic observations indicated that both the composite material substrate and the adhesive exhibited plasticization under high temperature and humidity conditions, and pores caused by moisture intrusion were present. Overall, this study reveals the impact of hygrothermal environments on composite material structures and highlights the differences between conductivity monitoring and mechanical properties. This is crucial for understanding the performance changes of composite materials under specific environmental conditions. However, further research is needed to explain the complex relationships between hygrothermal aging, conductivity, and mechanical properties to improve the prediction and control of composite material structural performance. | en |
| dc.description.provenance | Submitted by admin ntu (admin@lib.ntu.edu.tw) on 2024-08-09T16:13:31Z No. of bitstreams: 0 | en |
| dc.description.provenance | Made available in DSpace on 2024-08-09T16:13:32Z (GMT). No. of bitstreams: 0 | en |
| dc.description.tableofcontents | 口試委員審定書 ............................................................................................................... I
摘要 ................................................................................................................................. II 誌謝 ................................................................................................................................ III ABSTRACT .................................................................................................................. IV 目次 ................................................................................................................................ VI 圖次 ................................................................................................................................ XI 表次 ............................................................................................................................... XV 第一章 緒論 .............................................................................................................. 1 1.1 前言 ........................................................................................................................ 1 1.2 研究動機 ................................................................................................................ 3 1.3 論文架構 ................................................................................................................ 4 第二章 文獻回顧 ...................................................................................................... 5 2.1 碳纖維強化複合材料（CFRP） .......................................................................... 5 2.2 單搭接膠合接口（SINGLE LAP JOINT, SLJ） ....................................................... 6 2.2.1 製備參數 ........................................................................................................ 6 2.2.2 應力分布 ........................................................................................................ 7 2.3 複合材料之非破壞性檢驗 .................................................................................. 10 2.3.1 嵌入式感測 .................................................................................................. 10 2.3.1.1 光纖光柵感測 ....................................................................................... 10 2.3.1.2 壓電感測 ............................................................................................... 10 2.3.2 外部檢測 ....................................................................................................... 11 2.3.2.1 結構振動 ................................................................................................ 11 2.3.2.2 超聲波 .................................................................................................... 11 2.3.3 結構健康監控（Structural Health Monitoring, SHM） ............................. 12 2.3.3.1 奈米碳管導電性原理 ........................................................................... 12 2.3.3.2 利用電阻變化進行實時監測 ............................................................... 14 2.4 濕熱老化（HYGROTHERMAL AGING） ................................................................ 18 2.4.1 搭接劑的濕熱老化 ...................................................................................... 18 2.4.2 碳纖維複材的溼熱老化 .............................................................................. 20 2.4.3 碳纖維複材單搭接膠合接口的溼熱老化 .................................................. 26 2.4.4 導電性監測複材濕熱老化 .......................................................................... 30 2.5 總結 ...................................................................................................................... 31 第三章 實驗材料與設備 ........................................................................................ 32 3.1 製備碳纖維複材試片之材料 .............................................................................. 32 3.1.1 碳纖維單向環氧樹脂預浸布 ...................................................................... 32 3.1.2 環氧樹脂搭接劑 .......................................................................................... 33 3.1.3 多壁奈米碳管 .............................................................................................. 33 3.1.4 雙導電銅箔膠帶 .......................................................................................... 33 3.2 製備碳纖維複材試片之設備 .............................................................................. 34 3.2.1 熱壓成型系統 .............................................................................................. 34 3.2.2 深切緩給切割機 .......................................................................................... 35 3.2.3 噴砂機 .......................................................................................................... 36 3.3 調配搭接劑之設備 .............................................................................................. 36 3.3.1 電磁加熱攪拌器 .......................................................................................... 36 3.3.2 超音波打碎機 .............................................................................................. 37 3.3.3 均質機 .......................................................................................................... 37 3.3.4 真空脫泡機 .................................................................................................. 38 3.3.5 食物攪拌器 .................................................................................................. 38 3.4 螢光液滲處理之設備 .......................................................................................... 39 3.4.1 螢光液滲透劑 .............................................................................................. 39 3.4.2 螢光液清潔劑 .............................................................................................. 40 3.4.3 紫外光燈 ...................................................................................................... 40 3.5 環境與溫度控制之設備 ...................................................................................... 41 3.5.1 恆溫水槽 ...................................................................................................... 41 3.5.2 恆溫恆濕箱 .................................................................................................. 41 3.5.3 熱風循環烘箱 .............................................................................................. 42 3.6 重量量測之設備 .................................................................................................. 42 3.6.1 電子天平 ...................................................................................................... 42 3.7 萬能材料試驗機（MATERIAL TESTING SYSTEM, MTS） ................................... 43 3.8 膠合接口健康度監測之設備 .............................................................................. 44 3.8.1 多功能 I/O 數據擷取卡（NI-6009） ......................................................... 44 3.8.2 多功能 I/O 數據擷取卡（NI-6215） ......................................................... 44 3.8.3 電源供應器 .................................................................................................. 44 3.9 掃描式電子顯微鏡 .............................................................................................. 44 第四章 實驗方法與流程 ........................................................................................ 45 4.1 實驗流程 .............................................................................................................. 45 4.2 碳纖維複合材料單搭接試片製作 ...................................................................... 47 4.2.1 製作碳纖維複材積層板材 .......................................................................... 47 4.2.2 製作碳纖維複材試片 .................................................................................. 49 4.2.3 調配搭接劑進行搭接 .................................................................................. 50 4.3 品質管理規則 ...................................................................................................... 51 4.4 螢光液滲透處理 .................................................................................................. 52 4.5 濕熱環境控制處理 .............................................................................................. 53 4.5.1 試片準備處理 .............................................................................................. 53 4.5.2 實驗參數 ...................................................................................................... 53 4.5.3 吸水重量量測 .............................................................................................. 53 4.5.4 導電性量測 .................................................................................................. 53 4.6 機械性質試驗 ...................................................................................................... 54 4.6.1 拉伸試驗 ...................................................................................................... 54 4.6.2 疲勞循環應力試驗 ...................................................................................... 55 4.6.3 電壓監測膠合接口健康度 .......................................................................... 55 4.7 破斷面顯微觀察 .................................................................................................. 55 4.8 試片命名系統規則 .............................................................................................. 56 第五章 實驗結果與討論 ........................................................................................ 57 5.1 拉伸試驗品質管理結果 ...................................................................................... 59 5.1.1 螢光液滲處理之試片 .................................................................................. 59 5.1.2 濕熱環境控制處理試片 .............................................................................. 60 5.2 純乾燥疲勞壽命結果 .......................................................................................... 61 5.3 疲勞壽命與液滲面積之關係 .............................................................................. 62 5.4 電壓變化百分比與液滲面積之關係 .................................................................. 63 5.5 吸水重量量測結果 .............................................................................................. 64 5.6 濕熱環境控制處理之電壓監測結果 .................................................................. 65 5.6.1 高溫高濕（浸泡熱水） .............................................................................. 65 5.6.2 高溫低濕 ...................................................................................................... 67 5.7 濕熱環境控制處理天數及電壓監測值與機械性質試驗結果 .......................... 68 5.7.1 濕熱環境控制處理天數與拉伸強度 .......................................................... 68 5.7.2 濕熱環境控制處理電壓監測與拉伸強度 .................................................. 69 5.7.3 濕熱環境控制處理天數與疲勞壽命 .......................................................... 70 5.7.4 濕熱環境控制處理電壓監測與疲勞壽命 .................................................. 72 5.8 破斷面顯微觀察 .................................................................................................. 73 5.8.1 試片宏觀失效 .............................................................................................. 73 5.8.2 電壓變化百分比與脫層面積之微觀觀察結果 .......................................... 73 5.8.3 濕熱環境控制處理天數差異之微觀觀察結果 .......................................... 75 5.8.3.1 高溫高濕長短天期微觀破壞特徵比較 ............................................... 75 5.8.3.2 高溫低濕長短天期微觀破壞特徵比較 ............................................... 76 5.8.4 高溫高濕（浸泡熱水）電壓上升速率差異之微觀觀察結果 .................. 77 5.8.5 濕熱環境控制處理後之試片微觀觀察總結 .............................................. 78 第六章 結論與未來展望 ........................................................................................ 79 6.1 結論 ...................................................................................................................... 79 6.2 未來展望 .............................................................................................................. 80 參考文獻 ........................................................................................................................ 81 附錄 ................................................................................................................................ 93 附錄A 螢光液滲處理之試片實驗數據 ................................................................... 93 附錄B 濕熱環境控制處理之試片實驗數據 ......................................................... 126 | - |
| dc.language.iso | zh_TW | - |
| dc.subject | 碳纖維複合材料 | zh_TW |
| dc.subject | 單搭接膠合接口 | zh_TW |
| dc.subject | 環氧樹脂混合奈米碳管 | zh_TW |
| dc.subject | 螢光液滲處理 | zh_TW |
| dc.subject | 結構健康監測 | zh_TW |
| dc.subject | 濕熱老化 | zh_TW |
| dc.subject | 機械性質 | zh_TW |
| dc.subject | Single lap joint adhesive joint | en |
| dc.subject | Mechanical property | en |
| dc.subject | Structural health monitoring (SHM) | en |
| dc.subject | Hygrothermal aging | en |
| dc.subject | Liquid fluorescent penetrant treatment | en |
| dc.subject | Epoxy resin mixed with CNT | en |
| dc.subject | Carbon fiber reinforced plastic | en |
| dc.title | 以導電性監測複材膠合接口濕熱老化破壞之探討 | zh_TW |
| dc.title | Investigation of hygrothermal aging damage in composite adhesive joints monitored by conductivity | en |
| dc.type | Thesis | - |
| dc.date.schoolyear | 112-2 | - |
| dc.description.degree | 碩士 | - |
| dc.contributor.oralexamcommittee | 趙振綱;吳文方;林志郎 | zh_TW |
| dc.contributor.oralexamcommittee | Ching-Kong Chao;Wen-Fang Wu;Chih-Lang Lin | en |
| dc.subject.keyword | 碳纖維複合材料,單搭接膠合接口,環氧樹脂混合奈米碳管,螢光液滲處理,結構健康監測,濕熱老化,機械性質, | zh_TW |
| dc.subject.keyword | Carbon fiber reinforced plastic,Single lap joint adhesive joint,Epoxy resin mixed with CNT,Liquid fluorescent penetrant treatment,Hygrothermal aging,Structural health monitoring (SHM),Mechanical property, | en |
| dc.relation.page | 185 | - |
| dc.identifier.doi | 10.6342/NTU202402665 | - |
| dc.rights.note | 同意授權(全球公開) | - |
| dc.date.accepted | 2024-08-05 | - |
| dc.contributor.author-college | 工學院 | - |
| dc.contributor.author-dept | 機械工程學系 | - |
| 顯示於系所單位： | 機械工程學系 | |
文件中的檔案：
| 檔案 | 大小 | 格式 | |
|---|---|---|---|
| ntu-112-2.pdf | 78.15 MB | Adobe PDF | 檢視/開啟 |
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