Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/2248
標題: 機械吊具之有限元素法彈塑性結構分析
The elasto-plastic analysis of Heavy Duty Hoist Ring by the finite element method
作者: 林建宏
LIN, CHIEN-HUNG
關鍵字: mechanical hoist;機械吊具;finite element method;strain-hardening coefficient;elasto-plastic analysis;有限元素法;硬化參數;彈塑性分析
出版社: 機械工程學系所
引用: [1] 行政院勞工委員會:勞動檢查年報。2001~2007。 [2] 唐建群;張禮敬;鞏建鳴;塗善東;張景明,“吊鉤斷裂原因分析”理化檢驗物理分冊 第40卷3期 138-141。 [3] 張智堯,“熱彈塑性之有限元素分析”,碩士論文,中興大學機械工程研究所,2008年。 [4] 吉田總仁著;劉松柏譯,彈.塑性力學基礎,2008。 [5] 許源泉,塑性加工學,2005。 [6] 金屬材料拉伸試驗試片,中華民國國家標準,CNS2112 G2014 [7] Chang,T.Y.,Chu, S.C.“Elastic-Plastic Deformation of Cylinderical Pressure Vessels under Cyclic Loading”,Nuclear Engineering and Design, Vol.27,1974:pp.228-278. [8] McMeeking,R.M.; Rice,J.R.“FINITE-ELEMENT FORMULATIONS FOR PROBLEMS OF LARGE ELASTIC-PLASTIC DEFORMATION”,Int J Solids Struct Vol.11 1975:pp601-616. [9] Cailletaud,G.“SOME ELEMENTS ON MULTIAXIAL BEHAVIOUR OF 316 L STAINLESS STEEL AT ROOM TEMPERATURE”,Mechanics of Materials, Vol.3,1984:pp.333-347. [10] Raabe,D.," Yield surface simulation for partially rescrystallized aluminum polycrystals on the basis of spatially discrete data ",Computational Mater.Sci,Vol.19,2000:pp.13-26. [11] Bucher,A.,Gorke,U.J.,Kreißig,R.,"A material model for finite elasto-plastic deformations considering a substructure ",Int. J.Plasticity, Vol.20,2004:pp.619-642. [12] Kowalczyk,K.,Gambin,W., " Model of plastic anisotropy evolution with texture-dependent yield surface ", Int. J. Plasticity, Vol.20,2004: pp.19-54. [13] Vincent,L.,Calloch,S.,Marquis,D.,"A general cyclic plasticity model taking into account yield surface distortion for multiaxial ratcheting ",Int.J.Plasticity,Vol.20,2004,pp1817-1850. [14] Sloboda,A.“Generalized elasticity method for curved beam stress analysis: Analytical and numerical comparisons for a lifting hook”,Mechanics Based Design of Structures and Machines, Vol.35,2007: pp319–332. [15] Huang,You-Min; Chen,Tsung-Chia,“An elasto-plastic finite-element analysis of sheet metal camber process”,Journal of Materials Processing Technology, Vol.140,2003:pp.432–440. [16] Jeom Kee Paik,Y.V. Satish Kumar,Jae Myung Lee,“Ultimate strength of cracked plate elements under axial compression or tension”, Thin-Walled Structures, Vol.43,2005:pp.237–272. [17] Arriaga,A.“Finite-element analysis of quasi-static characterisation tests in thermoplastic materials: Experimental and numerical analysis results correlation with ANSYS”, Polymer Testing, Vol.26,2007:pp.284–305. [18] STRESS-STRAIN CURVES 取於: http://web.mit.edu/course/3/3.11/www/modules/ss.pdf [19] Elasto-Plastic Fracture Mechanics 取於: http://155.185.228.112/dismi/radi/MSS/PlasticityTheory.pdf [20]“Components for Slings-Safety, Part 1:Forged Steel Components, Grade 8”,SVENSK STANDARD SS-EN 1677-1. [21]“Components for Slings-Safety, Part 2:Forged Steel Lifting Hooks with Latch,Grade 8”,SVENSK STANDARD SS-EN1677-2. [22] Fausett,Laurene V,Applied numerical analysis using MATLAB,1999.
摘要: 
物體飛落為相關重大職災中發生頻率最高的災害類型,發生意外的因素,包括吊具或鋼索強度不足、吊掛不當使用,若發生安全意外,更是造成無法挽回的遺憾,因此分析其塑性行為是有其必要性。
過去相關的研究,在有限元素分析在塑性分面,硬化參數往往都是以線性方式來計算,但實際上硬化參數是非線性變化。其他的研究以主要加強材料性質及相關材料處理方式進行分析。
本研究主要是研究機械吊具之結構,主要是透過材料實驗方式,得到吊具的材料性質,並以實驗資料建立硬化參數方程式,來表示硬化參數非線性行為,取代以往線性方式來計算硬化參數,並以塑性理論與有限元素法進行驗證此方法。並且依據實際使用的吊鉤及吊環,建立有限元素模型,進行彈塑性分析,再與吊鉤及吊環的拉伸實驗進行比對。研究結果顯示以此有限元素分析的結果與實驗,有相當高的吻合度,透過此方法可以精確了解吊具的應力分佈及變形情況,以確定設計之可行性或擬定可能改善之方案。

The fallen object is most serious occupational accident happened frequently than others in terms of clarification, including insufficient strength of hook and wire rope. To hang the hook improperly usually causes accident that we regret and cannot be recovered in a short time. Therefore, it is critical to analyze inelastic material behavior of the hook.
In the study of the past,when it comes to elasto-plastic analysis, strain-hardening coefficient is calculated by the method of linear. However, elasto-plastic analysis did not vary by the finite element method that had used the constant for but in fact strain-hardening coefficient is variable. The other research is to enhance the analysis of strength increase and the method of material treatment.
This research is mainly to study the structure of the mechanical hoist that mainly has follow material experiment to obtain unknown materials properties, and create strain-hardening coefficient equation by the experiment materials. The equation is the nonlinear of method that had replaced the linear of method in the past. The method is verified by plasticity theory and finite element method.We make two finite element models from hook and Hoist Ring,The next step is to compare elasto-plastic analysis with experiment and the consequence has to be in correspondence to each other. If we use the method, we will accurately understand distributed stress and deformation to ensure the feasibility of the design or improved plan.
URI: http://hdl.handle.net/11455/2248
其他識別: U0005-1410200920191400
Appears in Collections:機械工程學系所

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