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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 李貫銘 | |
dc.contributor.author | Hsuan-Ming Yen | en |
dc.contributor.author | 顏暄明 | zh_TW |
dc.date.accessioned | 2021-05-14T17:50:10Z | - |
dc.date.available | 2020-08-25 | |
dc.date.available | 2021-05-14T17:50:10Z | - |
dc.date.copyright | 2015-08-25 | |
dc.date.issued | 2015 | |
dc.date.submitted | 2015-08-20 | |
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[26] W. Müller and K. Pöhlandt, 'New experiments for determining yield loci of sheet metal,' Journal of Materials Processing Technology, vol. 60, pp. 643-648, 1996. [27] M. Geiger, W. Hußnätter, and M. Merklein, 'Specimen for a novel concept of the biaxial tension test,' Journal of materials processing technology, vol. 167, pp. 177-183, 2005. [28] S. Ikeda and T. Kuwabara, 'Measurement and analysis of work hardening of sheet metals under plane-strain tension,' in The Fifth International Conference and Workshop on Numerical Simulation of 3D Sheet Forming Processes (NUMISHEET 2002). Jeju Island, Korea, 2002, pp. 97-102. [29] Y. Hanabusa, H. Takizawa, and T. Kuwabara, 'Numerical verification of a biaxial tensile test method using a cruciform specimen,' Journal of Materials Processing Technology, vol. 213, pp. 961-970, 2013. [30] http://fr.wikipedia.org/wiki/Effet_Bauschinger. [31] F. Yoshida and T. 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Brem, 'A six-component yield function for anisotropic materials,' International journal of plasticity, vol. 7, pp. 693-712, 1991. [37] F. Barlat, J. Brem, J. Yoon, K. Chung, R. Dick, D. Lege, et al., 'Plane stress yield function for aluminum alloy sheets—part 1: theory,' International Journal of Plasticity, vol. 19, pp. 1297-1319, 2003. [38] J.-W. Yoon, F. Barlat, R. E. Dick, K. Chung, and T. J. Kang, 'Plane stress yield function for aluminum alloy sheets—part II: FE formulation and its implementation,' International Journal of Plasticity, vol. 20, pp. 495-522, 2004. [39] R. K. Verma, T. Kuwabara, K. Chung, and A. Haldar, 'Experimental evaluation and constitutive modeling of non-proportional deformation for asymmetric steels,' International Journal of Plasticity, vol. 27, pp. 82-101, 2011. [40] 蘇昱竹, '先進高強度鋼板沖壓成形回彈現象之研究,' 臺灣大學機械工程學研究所學位論文, 2007. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/4905 | - |
dc.description.abstract | 車體輕量化是國際間各大汽車廠努力之目標。為兼顧生產成本以及達成車輛輕量化之目標,汽車結構件使用先進高強度鋼板已成為國際車廠的共同趨勢。但因鋼板強度之提升,沖壓成形更加困難,且側壁外開、側壁捲曲等缺陷亦更加嚴重。對於高強度鋼板之沖壓成形問題,國際間產學研各界已紛紛投入高強度鋼板之材料模型研究,其中包含考慮材料包辛格效應之加工硬化準則及考慮雙軸向受力行為之降伏準則,藉由瞭解材料之塑性變形特性,提升高強度鋼板沖壓成形特性分析與回彈預測之能力。 加工硬化準則方面,本實驗室已完成建立先進高強度鋼板之Yoshida-Uemori材料模型參數。因此本研究的重點為建立適用於先進高強度鋼板雙軸受力下之降伏準則。首先,改良雙軸夾治具機構之設計,使其可用於建立目前汽車結構件冷沖壓強度最高之1180級鋼的降伏準則。此雙軸夾治具的另一個特色是可用於單軸單動式材料試驗機,適合產業界的需求。而在雙軸試片方面,由於目前並無雙軸拉伸試片形狀與尺寸之規範。因此,本研究針對文獻中使用之雙軸試片配合本研究開發之雙軸夾治具機構之作動方式進行優化,並設計出最符合本研究之十字形溝槽試片。完成雙軸夾治具機構之改良與雙軸試片設計後,根據實驗數據建立有限元素分析所需之各降伏準則材料模型參數。最後,結合考慮包辛格效應之Yoshida-Uemori材料模型與文獻中常見之降伏準則,進行基礎載具沖壓成形模擬分析與實驗,其結果顯示Yld2000-2d降伏準則結合Yoshida-Uemori材料模型,可有效提升先進高強度鋼板於沖壓成形模擬之回彈預測準確性。 | zh_TW |
dc.description.abstract | Because design for lightweight automobiles becomes a major goal for vehicle manufacturers, the use of advanced high strength steels in automobile structural parts manufacture becomes a trend. In order to improving CAE simulation accuracy of stamping processes, recent researches focus on the development of advanced high strength steel material models, taking Bauschinger effect and yield criteria under biaxial stress into consideration. With better understanding of material behaviors during plastic deformation, accurate springback prediction can be achieved. The Yoshida-Uemori model, which considers the Bauschinger effect, for advanced high strength steels was established in our lab. This research aims at exploration of the biaxial tensile test for advanced high strength steels. Thus, a complete material model for advanced high strength steels can be established. In this study, the apparatus for biaxial tensile test is improved. With the design of low friction in this apparatus, it is able to perform the biaxial tensile test of 1180Y steels. As for the specimen for the biaxial tensile test, standards for specimen shape and dimension are not available. Therefore, the specimen geometry is also designed in this research. After the improved biaxial tensile test apparatus is established, the biaxial tensile tests for advanced high strength steels, including grades of 590Y, 780Y, 980Y and 1180Y, are carried out. The parameters for different yield criteria are obtained based on experimental results. Combining the Yoshida-Uemori model and various yield criteria, CAE simulations for V-bending and U-hat stamping are carried out. The comparison of CAE simulations and experimental results shows that the combination of Yld2000-2d yield criterion with Yoshida-Uemori model is most appropriate in springback prediction of stamping advanced high strength steels. | en |
dc.description.provenance | Made available in DSpace on 2021-05-14T17:50:10Z (GMT). No. of bitstreams: 1 ntu-104-R02522701-1.pdf: 11505415 bytes, checksum: 10b951b356594097ec4e2f90f90ab51f (MD5) Previous issue date: 2015 | en |
dc.description.tableofcontents | 目錄 I 圖目錄 IV 表目錄 IX 第一章 緒論 1 1.1 前言 1 1.2 研究動機與目的 4 1.3 文獻回顧 6 1.4 研究方法與步驟 9 1.5 論文總覽 10 第二章 先進高強度鋼板材料模型之探討 12 2.1 材料包辛格效應 12 2.1.1 先進高強度鋼板之包辛格效應 13 2.2 材料加工硬化準則之探討 15 2.2.1 等向加工硬化準則之探討 16 2.2.2 動態加工硬化準則之探討 17 2.2.3 混合型加工硬化準則之探討 18 2.2.4 Yoshida-Uemori材料模型之探討 19 2.2.4.1 Yoshida-Uemori材料模型之材料加工硬化模式 20 2.2.4.2 Yoshida-Uemori材料模型各項參數之探討 23 2.3 材料降伏準則之探討 28 2.3.1 等向性降伏準則之探討 28 2.3.2 Hill 48 降伏準則之探討 30 2.3.3 Hill 90 降伏準則之探討 34 2.3.4 Barlat 89及Barlat91 降伏準則之探討 37 2.3.5 Yld2000-2d降伏準則之探討 39 2.3.6 適用之降伏準則探討 42 第三章 雙軸拉伸夾治具機構之改良 45 3.1 現有雙軸夾治具機構介紹 (第一版) 46 3.1.1 現有雙軸夾治具機構之缺陷 51 3.1.2 現有雙軸夾治具之優化與CAE分析 55 3.1.2.1 拉伸桿簡易外形變化與一體化設計之探討 55 3.1.2.2 拉伸桿鳩尾槽造型參數之探討 58 3.1.2.3 圓柱叉銷式拉伸桿 62 3.1.2.4 優化雙軸夾治具探討之小結 65 3.2 改良之雙軸夾治具機構介紹(第二版) 66 3.2.1 改良前後雙軸夾治具之差異 66 3.2.2 改良之雙軸夾治具機構CAE分析 68 3.3 雙軸夾治具機構製作、測試與改良 71 3.3.1 雙軸夾治具機構之製作 72 3.3.2 雙軸夾治具機構拉伸測試 75 3.3.3 雙軸夾治具機構之修正與改良 78 第四章 雙軸拉伸試片設計與分析 83 4.1 雙軸拉伸試片之設計目標 83 4.2 雙軸拉伸試片優化設計與CAE分析 84 4.2.1 雙軸拉伸試片之不對稱設計與CAE分析 87 4.2.1.1 不對稱試片設計之溝槽寬度CAE分析 88 4.2.1.2 不對稱試片設計之溝槽數目CAE分析 94 4.2.1.3 不對稱試片設計之溝槽數目與寬度搭配之CAE分析 98 4.2.1.4 不對稱試片設計結論 102 4.3 雙軸向拉伸試片受力方式之探討 107 第五章 先進高強度鋼板雙軸降伏準則材料參數建立 109 5.1 雙軸向拉伸試驗之執行 109 5.1.1 雙軸實驗分析之方法 109 5.1.2 雙軸向拉伸試驗之量測 113 5.1.3 雙軸夾治具機構之摩擦力探討與試驗 115 5.1.4 雙軸向拉伸試驗 124 5.2 探討適合先進高強度鋼板在雙軸受力下之降伏準則 128 5.3 CAE降伏準則材料參數之建立 131 第六章 先進高強度鋼板材料模型應用與驗證 133 6.1 V型載具模擬分析與實驗驗證 134 6.2 U型帽狀載具模擬分析與實驗驗證 136 第七章 結論與未來展望 139 7.1 結論 139 7.2 未來展望 140 參考文獻 141 | |
dc.language.iso | zh-TW | |
dc.title | 雙軸拉伸試驗夾治具機構與試片形狀之優化設計 | zh_TW |
dc.title | Optimized Designs of Experimental Apparatus and Specimens Geometry for Biaxial Tensile Test | en |
dc.type | Thesis | |
dc.date.schoolyear | 103-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 陳復國,洪景華,黃永茂 | |
dc.subject.keyword | 先進高強度鋼板,材料模型,降伏準則,雙軸拉伸試驗,雙軸拉伸試片,有限元素法分析, | zh_TW |
dc.subject.keyword | advanced high strength steel,material model,yield criterion,biaxial tensile test,biaxial specimen,finite element analysis, | en |
dc.relation.page | 143 | |
dc.rights.note | 同意授權(全球公開) | |
dc.date.accepted | 2015-08-20 | |
dc.contributor.author-college | 工學院 | zh_TW |
dc.contributor.author-dept | 機械工程學研究所 | zh_TW |
顯示於系所單位: | 機械工程學系 |
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