跳到主要內容

臺灣博碩士論文加值系統

(3.236.84.188) 您好!臺灣時間:2021/08/03 16:32
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

: 
twitterline
研究生:吳文傑
研究生(外文):Wen-JeiWu
論文名稱:高應變率拉伸環境系統建構及鋁合金材料機械行為之測定
論文名稱(外文):High Strain-Rate Tensile Loading System’s Development and its Application to Aluminum Alloys
指導教授:鄭泗滄鄭泗滄引用關係
指導教授(外文):Syh-Tsang Jenq
學位類別:碩士
校院名稱:國立成功大學
系所名稱:航空太空工程學系碩博士班
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:2012
畢業學年度:100
語文別:中文
論文頁數:89
中文關鍵詞:SHTB動態應力應變關係應變率應力波
外文關鍵詞:SHTBdynamic stress-strain relationshipstrain ratestress wave
相關次數:
  • 被引用被引用:1
  • 點閱點閱:305
  • 評分評分:
  • 下載下載:63
  • 收藏至我的研究室書目清單書目收藏:0
本文主旨在發展拉伸式哈普金森桿(SHTB)之設計,並依此針對6061-T6與6061-O之鋁合金之試片,觀察其動態應力應變關係。首先使用SHIMAZDU AG-X量測在室溫下受到1.3×10-4s-1之應變率下,鋁試片的應力應變關係。除此之外,亦利用SHTB進行應變率在500 s-1 to 1200 s-1範圍內之動態測試。為了檢視與確認本次實驗的準確性與精準度,分別與參考文獻[4]與[8]所執行之6061-O與6061-T6之鋁合金應力應變曲線進行比對,在特定試片下所做出來的結果,其誤差在5.7%內。此外將實驗得到之應力應變曲線數據輸入至有限元素分析軟體內,試片的設定採用多線性塑性段材料組成定律,並檢視與比較模擬與實驗的結果,在鈦合金桿件上之穿透波與入射波的應力波大小。此外, 6061-T6與6061-O試片之應變率效應與所有完整的結果清楚地呈現在本論文研究中。
The main goal of this work is to design a material tester of Split Hopkinson Tension Bar (SHTB) to acquire the dynamic stress-strain relationships for the relative and relevant specimens that are composed of aluminum alloy 6061-T6 and 6061-O. SHIMAZDU AG-X is used to measure stress-strain relationships for Al specimens at a strain rate of 1.3×10-4s-1 at the room temperature. Besides, Split Hopkinson Tension Bar is also to perform the dynamic stress-strain property with strain rate ranging from 500s-1 to 1200 s-1. In order to check and ensure the adequacy and accuracy of our test, the specific stress-strain curves for 6061-O and 6061-T were compared with Ref (4) & (8), respectively. It shows the consistent and reasonable results for prescribed specimens and the deviation error of the test result is under 6.6%. Subsequently, we take the experimental stress-strain curve into the piecewise-plasticity constitute material model for Al specimen in commercial FEM code - LS-DYNA. Upon examining the simulation and experiment, it shows a good agreement for the transmission and incident waves on the elastic Ti-alloy bar. The strain rate effect is also observed for the specimens of 6061-T6 and 6061-O under high strain rate tension test at room temperature. All of the complete results are presented and reported clearly on this study.
簽名頁
誌謝
中文摘要 I
ABSTRACT II
目錄 III
表目錄 VI
圖目錄 VII
第一章 緒論 1
1-1 研究背景 1
1-2 研究動機 2
1-3 研究目的 2
1-4 研究方法與流程 3
1-5 文獻回顧 4
第二章 實驗理論 7
2-1 基本一維縱向彈性應力波理論 7
2-1-1應力波定義 7
2-1-2 均質長直桿件之一維縱向彈性波傳理論 8
2-1-3 應力波強度表示式 10
2-1-4 撞擊介面產生的反射與穿透現象 13
2-1-5 不連續介面產生的反射波與穿透波 15
2-1-6 邊界條件對應力波的影響 17
2-2 一維彈性波傳理論應用於拉伸式哈普金森試驗設備 20
2-2-1 應變率、平均應變、平均應力 20
2-2-2 應用於SHTB之理論 24
第三章 系統發展與實驗流程 32
3-1 實驗設備設計 32
3-1-1 實驗設備簡介 32
3-1-2 系統設計流程 34
3-1-3 實驗設備校正 35
3-1-4 試片製程 36
3-2 實驗流程 38
3-2-1 實驗相關設備 38
3-2-2 實驗前置作業 39
3-2-3 高應變率拉伸試驗 40
3-2-4 共軸度測試 41
3-2-5 波形之整形法 42
3-2-6 一波法與二波法 43
3-2-7 擬靜態拉伸試驗 43
第四章 實驗結果 55
4-1 動態拉伸試驗 55
4-1-1 Al-6061-T6 55
4-1-2 Al-6061-O 57
4-2 擬靜態拉伸試驗 59
4-2-1 Al-6061-T6 59
4-2-2 Al-6061-O 60
4-3 實驗結果討論 60
4-3-1 Al 6061-T6之實驗結果 60
4-3-2 Al 6061-O之實驗結果 60
第五章 實驗驗證 74
5-1 理論與模擬驗證 74
5-2 模擬與實驗驗證 77
第六章 結論 84
參考文獻 86
1.T. Nicholas, Tensile Testing of Materials at High Rates of Strain, Experimental Mechanics, 21, 177-185, 1981.

2.J. Harding, L. M. Welsh, A Tensile Testing Technique for Fibre-Reinforced Composites at Impact Rates of Strain, Journal of Materials Science, 18, 1810-1826, 1983.

3.小栗富士雄、小栗達男, 標準機械設計圖表便覽, 臺隆書店, pp. 3b_24-3b_52, 2001.

4.S. T. Jenq, and S. L. Sheu, An Experimental and Numerical Analysis for High Strain Rate Compressional Behavior of 6061-O Aluminum Alloy, Computers & Structures Vol. 52, No. 1, 27-34, 1994.

5.張桓琥, 多種錫鉛及無錫鉛材料之動態衝擊特性研究, 國立成功大學航空太空工程研究所碩士論文, 2007.

6.林仁傑, 無鉛銲錫材料在不同溫度下的動態衝及特性研究, 國立成功大學航空太空工程研究所碩士論文, 2008.

7.許樹林, 使用哈普金森桿量測複合材料在較高應變率時之動態衝壓特性 國立成功大學航空太空工程研究所碩士論文, 1992.

8.Xin Tang, V. Prakash, and J. Lewandowski, Dynamic Tensile Deformation of Aluminum Alloy 6061-T6 and 6061-OA, Proceedings of the 2006 SEM Annual Conference, 2006.

9.M. Li, R Wang, and M. B. Han, A Kolsky Bar: Tension, Tension-tension, Experiment Mechanics, 33, 7-14, 1993.

10.G. H. Staab, A. Gilat, A Direct-Tension Split Hopkinson Bar for Strain-Rate Testing, Experimental Mechanics, 31, 232-235, 1991.

11.T. Yokoyama, Impact Tensile Stress-Strain Characteristics of Wrought Magnesium Alloys, Stain, 39, 167-175, 2003.

12.K. NAKAI, and T. Yokoyama, Dynamic Tensile Properties of Nuclear-Grade Graphite IG-11, 6th International Symposium on Advanced Science and Technology in Experimental Mechanics, 2011.

13.W. Johnson, Impact Strength of Materials, Edward Arnold, England, pp. 1-50, 1972.

14.Karl F. Graff, Wave Motion in Elastic Solids, Dover Publications, INC, New York, pp. 75-139, 1975.

15.Marc A. Meyers, Dynamic Behavior of Materials, Wiley Interscince Publication, New York, pp. 23-40, 1994.

16.Marc A. Meyers, Dynamic Behavior of Materials, Wiley Interscince Publication, New York, pp. 296-310, 1994.

17.Kolsky H., “Stress Wave in Solids, Dover Publications, New York, 1963.

18.F. P. Beer, E. R. Johnson Jr., J. T. Dewolf, D. F. Mazurek, Mechanics of Materials, McGraw-Hill, New York, pp. 61-62, 2012.

19.Bo Song, B. R. Antoun, Kevin Connelly, John Korellid, Wei-Yang Lu, “A Newly Developed Kolsky Tension Bar, Dynamic Behavior of Materials, SEM Annual Conference, Vol. 1, 447-448, 2011.

20.A. T. Owens, Development of a Split Hopkinson Tension Bar for Testing Stress-Strain Response of Particulate Composites under High Rate of Loading, Auburn University, 2007.

21.Weinong W. Chen, Bo Song, “Split Hopkinson (Kolsky) Bar - Design, Testing and Applications, Springer, New York, pp. 261-289, 2011.

22.Standard Practice for Heat Treatment of Wrought Aluminum Alloys, ASTM B918/B918M-09, 2009.

23.Standard Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products (Metric), ASTM B557M-10, 2010.

24.W. Chen, B. Song, D. J. Frew, and M. J. Forrestal, Dynamic Small Strain Measurements of a Metal Specimen with a Split Hopkinson Pressure Bar, Experimental Mechanics, Vol. 43, No. 1, pp. 20-23, 2003.

25.H. Huh, W. J. Kang, S. S. Han, A Tension Split Hopkinson Bar for Investigating the Dynamic Behavior of Sheet Metals, Experimental Mechanics, Vol. 42, No. 1, 08-17, 2002.

26.W. D. Callister, Jr., Materials Science and Engineering- An Introduction, John Wiley & Sons, Inc., New York, pp. 387-401, 2007.

27.勢流科技股份有限公司, 結構分析軟體LS-DYNA技術講座Implicit/Explicit, pp. 38-40, 2006.

連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top