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研究生:錢保竹
研究生(外文):Pao-Chu Chien
論文名稱:奈奈米碳管複合材料薄膜機械性質檢測、應力與破壞分析
論文名稱(外文):Carbon nanotube composite materials film mechanical properties testing, stress and fracture analysis
指導教授:何旭川
指導教授(外文):Shiuh-Chuan Her
口試委員:余念一鄭錦榮
口試委員(外文):Niann-I YUJiin-Rong Cheng
口試日期:2014-07-24
學位類別:碩士
校院名稱:元智大學
系所名稱:機械工程學系
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2014
畢業學年度:102
語文別:中文
論文頁數:95
中文關鍵詞:多壁奈米碳管奈米複合材料薄膜破壞韌性三點彎曲實驗
外文關鍵詞:multi-walled carbon nanotubenanocomposite filmfracture toughnessthree-point bending test
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奈米碳管優異的機械熱傳導性質為理想的加強材料,本文以環氧樹脂為基材,添加重量百分比分別為0.3%、0.5%、0.8%和1%之多壁奈米碳管,製備奈米複合材料。應用熱壓成型機於鋁基板表面,塗覆厚度約0.2mm之奈米複合材料薄膜,再以三點彎曲實驗檢測薄膜楊氏係數。探討基板承受拉伸與彎曲附載,薄膜應力分佈與所分擔負載,在分別以四點彎曲實驗及三點彎曲實,檢測奈米複合材料薄膜與基板界面破壞模式I和II 之破壞任性。實驗結果顯示薄膜楊氏係數、分擔負載能力、界面裂縫破壞任性,均隨著多壁奈米碳管重量百分比之增加而增加。其中奈米碳管重量百分比1%之薄膜,楊氏係數可增加21.2%,分擔拉伸與彎曲能力可提升約21%,破壞模式I和II之破壞任性可增加54%。另再以掃描式電子顯微鏡觀察試片破壞斷面,結果顯示奈米碳管能均勻分散於環氧樹脂基材中,致使奈米複合材料薄膜機械性質獲得顯著提升。
Carbon nanotubes with excellent mechanical and thermal properties have been considered as ideal reinforcements. In this investigation, various contents of multi-walled carbon nanotube (MWCNT) ranging from 0.3 % ~1.0 % wt. were added to the epoxy to fabricate the nanocomposites. Nanocomposite films with thickness of 0.2 mm were deposited on the aluminum substrate using the hot press machine. The Young’s modulus of the nanocomposite film was determined by the three-point bending test. The stress distribution and load carrying capability of the nanocomposite film subjected to tensile and bending loads were derived basing on the shear lag model and Bernoulli beam theory. Three-point and four-point bending tests were conducted to determine the interfacial fracture toughness of mode I and II, respectively. Experimental test results show that the Young’s modulus, load carrying capability and fracture toughness of the nanocomposite film are increasing with the increase of the content of MWCNTs. In the case of nanocomposite film with 1.0 % wt. MWCNTs, the Young’s modulus, load carrying capability and fracture toughness are increased by 21.2%, 21% and 54% compared with neat epoxy, respectively. In addition, the dispersion of MWCNTs in the epoxy based matrix was examined using the scanning electronic microscope (SEM). The SEM images depict that MWCNTs are well dispersed resulting in the enhancement of the mechanical properties of the nanocomposite films.
書名頁.....................................................i
論文口試委員審定書...........................................ii
授權書....................................................iii
中文摘要...................................................iv
英文摘要....................................................v
致謝......................................................vi
目錄.....................................................vii
表錄......................................................ix
圖目錄.....................................................xi
第一章 緒論................................................1
1.1 研究動機...............................................2
1.2 文獻回顧...............................................3
1.3 研究內容...............................................4
第二章 奈米複合材料製程設備與製作方法...........................6
2.1 奈米複合材料製程設備.....................................6
2.2 基本材料...............................................8
2.3 奈米碳管複合材料製程. ..................................10
第三章 塊材奈米碳管複合材料性質...............................12
3.1 拉伸試驗..............................................12
3.1.1 實驗理論與方法.......................................12
3.1.2 拉伸測試結果討論.....................................15
3.2 彎曲試驗..............................................16
3.2.1 實驗理論與方法.......................................16
3.2.2 彎曲測試結果討論.....................................17
第四章 奈米碳管複合材料薄膜機械性質............................19
4.1 三點彎曲實驗量計算薄膜楊氏係數............................19
4.2 彎曲試驗結果與論.......................................21
第五章 奈米碳管複合材料薄膜力學性質析..........................23
5.1 拉伸負載應力分析.......................................23
5.2 拉伸實驗應力驗證.......................................25
5.3 彎矩負載應力分析.......................................26
5.4 四點彎曲實驗應力驗證....................................27
第六章 奈米碳管複合材料薄膜界面裂縫破壞分析.....................29
6.1 破壞模式 I 破壞韌性分析.................................29
6.2 破壞模式 I 之破壞韌性實驗量測............................30
6.3 破壞模式 II 破壞韌性分析................................32
6.4 破壞模式 II 之破壞韌性實驗量測...........................34
第七章 結論...............................................36
參考文獻...................................................38
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