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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 | Kuan-Chieh Chen | en |
dc.contributor.author | 陳冠杰 | zh_TW |
dc.date.accessioned | 2021-06-08T01:17:15Z | - |
dc.date.copyright | 2014-08-16 | |
dc.date.issued | 2014 | |
dc.date.submitted | 2014-08-12 | |
dc.identifier.citation | [1] Facing the Challenge(2007),from http://www.worldautosteel.org.
[2] Nasser, A. Yadav, P. Pathak and, T. Altan, 'Determination of the flow stress of five AHSS sheet materials (DP 600, DP 780, DP 780-CR, DP 780-HY and TRIP 780) using the uniaxial tensile and the biaxial Viscous Pressure Bulge (VPB) tests,' Journal of Materails Processing Technology, vol. 210, pp. 429-436, 2010. [3] R. Hill, “Constitutive modeling of orthotropic plasticity in sheet metals”, Journal of the Mechanics and Physics of Solids, Vol. 38, pp. 405-417, 1990. [4] R. Hill, “A theoretical perspective on in-plane forming of sheet metal”, Journal of the Mechanics and Physics of Solids, Vol. 39, No. 2, pp. 295-307, 1991. [5] R. Hill, “A user-friendly theory of orthotropic plasticity in sheet metals”, International Journal of Mechanical Sciences, Vol. 35, No. 1, pp. 19-25, 1993. [6] R. Hill, S. S. Hecker, M. G. Stout, “An investigation of plastic flow and differential work hardening in orthotropic brass tubes under fluid pressure and axial load”, International Journal of Solids Structure, Vol. 31, No. 21, pp. 2999-3021, 1994. [7] L. Wang and T. C. Lee, 'The effect of yield criteria on the forming limit curve prediction and the deep drawing process simulation,' International Journal of Machine Tools and Manufacture, vol. 46, pp. 988-995, 2006. [8] D. C. Ahn, J. W. Yoon and, K. Y. Kim, 'Modeling of anisotropic plastic behavior of ferritic stainless steel sheet,' International Journal of Mechanical Sciences, vol. 51, pp. 718-725, 2009. [9] C. Gomes, O. Onipede and, M. Lovell, 'Investigation of springback in high strength anisotropic steels,' Journal of Materials Processing Technology, vol. 159, pp. 91-98, 2004. [10] Forcellese, L. Fratini, Gabrielli and, Micari, 'Computer aided engineering of the sheet bending process,' Journal of Materials Processing Technology, vol. 60, pp. 225-232, 1996. [11] K. Mori, K. Akita and, Y. Abe, 'Springback behavior in bending of ultra-high-strength steel sheets using CNC servo press,' International Journal of Machine Tools & Manufacture, pp. 321-325, 2007. [12] M. Samuel, 'Experimental and numerical prediction of springback and side wall curl in U-bendings of anisotropic sheet metals,' Journal of Materials Processing Technology, vol. 105, pp. 382-393, 2000. [13] 林志勳, '高強度汽車結構件沖壓成形側壁捲曲現象之研究,' 國立台灣大學機械工程研究所碩士論文, 2012. [14] W. Thomas, T. Oenoki and, T. Altan, 'Process simulation in stamping-recent applications for product and process design,' Journal of Materials Processing Technology, vol. 98, pp. 232-243, 2000. [15] R. H. Wagoner and M. Li, “Simulation of springback: through-thickness integration”, International Journal of Plasticity, Vol. 23, pp. 345-360, 2007. [16] J. H. Song, H. Huh, and S. H. Kim, “Stress-based springback reduction of a channel shaped auto-body part with high-strength steel using response surface methodology”, Journal of Engineering Materials and Technology, Vol. 129, pp. 397-406, 2007. [17] S. K. Panthi, N. Ramakrishnan and, K. K. Pathak, 'An analysis of springback in sheet metal bending using finite element method (FEM),' Journal of Materials Processing Technology, vol. 186, pp. 120-124, 2007. [18] H. S. Cheng, J. Cao, and Z. C. Xia, “An accelerated springback compensation method”, International Journal of Mechanical Sciences, Vol. 49, pp. 267-279, 2007. [19] L. Marreta, G. Ingarao and, R. D. Lorenzo, 'Design of sheet stamping operations to control springback and thinning: A multi-objective stochastic optimization approach,' International Journal of Mechanical Sciences, pp. 914-927, 2010. [20] T. Meinders, I. A. Burchitz, M. H. A. Bonte, and R. A. Lingbeek, “Numerical product design: Springback prediction, compensation and optimization”, International Journal of Machine Tools & Manufacture, Vol. 48, pp. 499-514, 2008. [21] 周暐宬, '高強度汽車結構件沖壓成形之扭曲現象分析,' 國立台灣大學機械工程研究所碩士論文, 2012. [22] Thatcham 1st Sight (2012),from https://www.thatcham.org/ [23] http://www.mirdc.org.tw/FileDownLoad/EpaperFile/2/28/MPNEWS/text/9611_2_itis03.pdf [24] F. Yoshida and T. Uemori, “A model of large-strain cyclic plasticity describing the Bauschinger effect and workhardening stagnation”, International Journal of Plasticity, Vol. 18, pp. 661–686, 2002. [25] 蘇昱竹, “先進高強度鋼板沖壓成形回彈現象之研究”, 國立台灣大學機械工程研究所碩士論文, 2007. [26] R. Hill, 'A Theory of the Yielding and, Plastic Flow of Anisotropic Metals,' Proceedings of the Royal Society of London, vol. 193, pp. 281-297, 1948. | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/18651 | - |
dc.description.abstract | 先進高強度鋼板相較於傳統鋼板具有強度上之優勢,但也因為強度大幅提升,於沖壓成形方面容易產生破裂與回彈缺陷。產學研各界為深入研究高強度鋼板之沖壓成形問題,除了從模具設計角度分析外,均廣泛使用有限元素分析軟體作為工具,以探討成形缺陷之產生機制。然而在鋼板強度逐漸提升之趨勢下,有限元素法目前於成形回彈分析之準確性仍有所不足。故本研究當中,除針對模擬參數進行收斂性分析測試外,為進一步提升回彈分析之準確性,也將針對有限元素模擬所需之材料模型進行研究及比較。
為使有限元素軟體分析之結果接近於實際情況,本論文亦針對實際汽車結構件-橫樑件,進行開發設計,並藉由成形性分析了解成形狀況。回彈現象方面,提供回彈補償方法與建議,以改善成品之回彈量。最後在驗證方面,本研究利用逆向掃描取得實際沖壓成品之外型尺寸,並與採用不同材料模型之分析結果進行比較,可知使用Y-U model分析1180級鋼材回彈量之模擬準確率達80%以上。 本論文同時歸納目前各國車廠使用高強度鋼板於車體之相關資訊,包含使用高強度鋼板之結構件歸納、最常應用之鋼板強度等級以及目前冷沖壓鋼板應用於結構件之最高等級。在汽車結構件造型方面,本論文分析主要汽車結構件之造型參數且找出共通特徵,利用簡化造型探討特徵造型參數對成形性以及回彈現象之影響性,並比較材料強度提升時之差異,最後利用實際結構件模擬驗證,簡化造型與實際造型除了成形缺陷處皆相同外,且回彈準確率可達90%左右。本論文之研究成果可提供模具相關工作者於汽車結構件開發設計時之參考。 | zh_TW |
dc.description.abstract | Advanced high strength steels (AHSS) have higher strength than conventional steel sheets. However, the occurrence of stamping defect and springback are more difficult to be solved. In order to study the stamping problems of AHSS, the researchers not only make use of mold design but also finite element analysis software to investigate the mechanism of forming defects. The efforts were endeavored to establish the optimum simulation parameters, such as element size, number of integration point, and punch velocity. However, the accuracy for the prediction of springback still needs to be improved even with the optimum simulation parameters adopted. Hence, the material model, including the yield criteria and the work hardening rules, has been considered as the other possible reasons that may cause the inaccuracy of the finite element simulations in the sheet forming of advanced high strength steel.
With the use of the Yoshida-Uemori model, this thesis examined the springback occurred in the stamping of advanced high strength steel sheets. After stamping, the finished part was scanned by a coordinate measuring machine for the actual dimensions. Compared with the experimental data, the finite element simulation results with the use of the Yoshida-Uemori model display an error of less than 20% in predicting the springback of AHSS of grade DP1180. This thesis aims to establish the database of advanced high strength steel stampongs for automotive structural parts. This thesis first summarized the information of the applications for automotive parts made of advanced high strength steels in the world recently. Side sill, A-pillar and B-pillar were investigated in this study. The key geometric parameters for those structural parts, which affect the formability of AHSS sheets, were studied with simplified model, different grades of AHSS and sheet thickness were also included in this database. Finally, case studies for different actural automotive structure parts were presented. It is proved that the database can served as a reference for die design of advanced high strength steel stampings. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T01:17:15Z (GMT). No. of bitstreams: 1 ntu-103-R01522724-1.pdf: 4520649 bytes, checksum: 1f4330aa65896e059156d7f15744c0f4 (MD5) Previous issue date: 2014 | en |
dc.description.tableofcontents | 目錄 I
圖目錄 V 表目錄 XI 第一章 緒論 1 1.1前言 1 1.2 研究動機與目的 3 1.3 文獻回顧 4 1.4 研究方法與步驟 7 1.5論文總覽 8 第二章 先進高強度鋼板之材料模型分析 9 2.1 降伏準則之研究 9 2.1.1 Hill 48降伏準則 9 2.1.2 Hill 90降伏準則 11 2.2 加工硬化準則之研究 13 2.2.1等向硬化準則 13 2.2.2動態硬化準則 14 2.2.3混和型硬化準則 16 2.3高強度鋼板之回彈現象 19 2.3.1側壁外開(Springback)現象 19 2.3.2 側壁捲曲(Side-wall curl)現象 21 2.3.3 扭曲(Distortion)現象 22 2.4基礎載具試驗驗證 23 2.4.1實驗設備介紹 23 2.4.2 V型彎曲試驗 25 2.4.3 U型帽狀成形試驗 26 2.4.4 CAE結果與實驗結果比對 27 第三章 實際載具橫樑件之試驗驗證 30 3.1研究載具介紹 30 3.2 模擬參數設定 32 3.2.1 收斂性測試 33 3.2.1.1板材網格尺寸 33 3.2.1.2沖壓速度 34 3.2.1.3積分點數目 35 3.2.2 CAE模擬參數訂定 35 3.3汽車結構件橫樑件之成形性分析 36 3.3.1第一道次成形 37 3.3.1第二道次成形 38 3.4橫樑件之實際沖壓試模 39 3.5汽車結構件橫樑件之回彈現象探討 42 3.5.1不同材料模型之比較驗證 44 3.5.2載具之模具設計分析 46 第四章 高強度鋼用於汽車結構件之資料收集與彙整 48 4.1 先進高強度鋼板於汽車產業之應用情況 48 4.1.1歐系車廠/車款 49 4.1.2日(韓)系車廠/車款 51 4.1.3美系車廠/車款 53 4.2 先進高強度鋼板於汽車結構件之使用情形 54 4.2.1高強度鋼於汽車結構件之應用現況 54 4.2.2未來汽車車體結構之發展趨勢 58 第五章 汽車結構件特徵造型之成形及回彈分析 59 5.1 汽車結構件之特徵造型分析 60 5.1.1 主要汽車結構件之特色說明 60 5.1.1.1 汽車結構件-車側門檻件 60 5.1.1.2汽車結構件-橫樑件 61 5.1.1.3 汽車結構件-A柱 62 5.1.1.4汽車結構件-B柱 62 5.1.1.5 汽車結構件-後大樑 63 5.1.1.6 汽車結構件-前後保險桿 63 5.1.2汽車結構件之尺寸收集 64 5.1.3汽車結構件之特徵造型參數及範圍 65 5.2結構件特徵造型參數對成形性之分析 68 5.2.1隧型樑特徵造型成形性分析 70 5.2.2 A柱特徵造型成形性分析 74 5.2.3 B柱特徵造型成形性分析 78 5.2.4造型特徵參數對成形影響之歸納 81 5.3影響成形性之特徵參數相互搭配及結果比較 82 5.3.1隧型樑造型特徵參數相互搭配結果 82 5.3.2 A柱特徵參數相互搭配結果 85 5.3.3 B柱特徵參數相互搭配結果 87 5.4結構件特徵造型參數對回彈現象之分析 90 5.4.1隧型樑造型之回彈分析 90 5.4.2 A柱特徵造型之回彈分析 93 5.4.3 B柱特徵造型之回彈分析 97 5.4.4造型特徵參數對影響回彈之歸納 100 5.5影響回彈之特徵參數相互搭配及結果比較 101 5.5.1隧型樑造型特徵參數 101 5.5.2 A柱造型特徵參數 104 5.5.3 B柱造型特徵參數 106 5.6高強度結構件成形/回彈資料庫之建立 107 第六章 實際載具之CAE成形分析驗證 112 6.1 實際車側門檻件之案例分析 112 6.2 實際A柱結構件之案例分析 115 6.3實際 B柱結構件之案例分析 117 第七章 結論 122 參考文獻 123 | |
dc.language.iso | zh-TW | |
dc.title | 高強度汽車結構件造型參數對成形缺陷之研究 | zh_TW |
dc.title | A Parametric Study of Forming Defects for High-Strength Automotive Structural Parts | en |
dc.type | Thesis | |
dc.date.schoolyear | 102-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 陳復國,黃庭彬 | |
dc.subject.keyword | 先進高強度鋼板,有限元素分析,汽車結構件,成形缺陷,回彈分析, | zh_TW |
dc.subject.keyword | advanced high strength steel,finite element simulation,automotive parts,formability,springback predicting, | en |
dc.relation.page | 125 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2014-08-12 | |
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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