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cavities, namely no cavity, stepped shaft cavity and hexagonal cavity. The forming limit of AA6061 tube changes greatly pre and post solution treatment, as shown in Fig. 12. The convex ring tube was formed... mm. The crack is perpendicular to circle orientation of tube and the fracture mode is brittle fracture. As it is solution heat treated at 560 °C for 120 min, the forming limit increases significantly......
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Forming process of cross-connected finned micro-grooves in copper strips CHI Yong(池 勇), TANG Yong(汤 勇), CHEN Jin-chang(陈锦昌), DENG Xue-xiong(邓学雄), LIU Lin(刘 林), WAN Zhen-ping(万珍平), LIU Xiao-qing... ‘pore-groove’ structure. On the fringe of grooves, there are micro fins that are advantageous for the core forming. So the cross-connected finned micro groove structure can be defined as ‘pore-groove-fin......
Fig. 6 Forming limit specimen after deformation 图7 5754铝合金的成形极限图 Fig. 7 Forming limit diagram of 5754 aluminum alloy 3 汽车大梁的冲压数值模拟与验证 以某汽车大梁为研究对象,对其进行冲压数值模拟分析,然后通过冲压试验,在板料上印制... limit test 表2 成形极限试样尺寸 Table 2 Dimension of forming limit sample 2 5754-H111铝合金材料模型 2.1 硬化模型 单向拉伸试验获得的材料力学性能数据如表3所列.其中n为应变硬化指数,r0,r45,r90代表与轧制方向分别为0°,45°,90°时试样的塑性应变比.拉伸和压缩应力-应......
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J. Cent. South Univ. (2019) 26: 1856-1862 DOI: https://doi.org/10.1007/s11771-019-4139-y A new slope optimization design based on limit curve method FANG Hong-wei(方宏伟)1,2, CHEN Yohchia(陈幼佳)3,4... Abstract: A new method is proposed for slope optimization design based on the limit curve method, where the slope is in the limit equilibrium state when the limit slope curve determined by the slip-line......
the relationship between punch load and stroke, the thickness distribution, the deformation history and the forming limit of work-piece in the elliptical cup drawing process. The numerical analysis and experiment.... The others are SUS301, SUS316, SUS410, SUS430, etc. The purpose of this work is to understand SUS304 stainless steel sheet metal forming limit by the elliptical cup drawing analysis. Simulation results......
forming limit diagram for formability characterization of 6061 aluminum [J]. Transactions of Nonferrous Metals Society of China, 2016, 26(9): 2433-2441. [5] WU Yong, LIU Gang, WANG Kai, LIU Zhi-qiang, YUAN...]. Materials & Design, 2016, 108: 298-307. [8] CAO Xiang-qing, XU Ping-ping, FAN Qi, WANG Wen-xian. Theoretical prediction of forming limit diagram of AZ31 magnesium alloy sheet at warm temperatures [J......
reduces the optimal blank holder force and the forming load, but also suppresses wrinkle on the flange. The limit drawing ratio of magnesium alloy sheet first rises then falls with the ultrasonic amplitudes...力效果,满足板材成形需要. 鉴于以上分析,将颗粒介质成形方法进一步拓展和延伸,在颗粒介质成形的基础上引入超声振动,本文作者首次提出板材超声振动颗粒介质成形(Ultrasonic-vibration granules medium forming, UGMF)工艺.将以AZ31B镁合金板为研究对象,展开UGMF试验,研究超声振动对金属板材温热成形的影响. 1 板材超声振动颗粒介质成形工艺......
. Key words: glass-forming ability; metallic glass; thermodynamics; phase diagram; electronic structure forming ability YANG Bing(杨 兵), DU Yong(杜 勇), LIU Yong(刘 咏) State Key Laboratory of Powder Metallurgy, Central South University, Changsha......