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2015 Abstract: The stretch flanging process is significantly affected by various geometrical, material and process parameters. The punch-die clearance and initial flange length are main parameters... process; finite element simulation; punch-die clearance; initial flange length; edge crack 1 Introduction The flanging is one of the most important sheet metal forming processes, which is generally used......
Grain Refining of Flange Plate for Welded H Section Steel Made under Asynchronous Rolling Condition戴辉Research Institute of Metallurgical Engineering,University of Science & Technology BeijingTangshan... cold rolling, flange plate steel, and for welded H section steel, respectively. The metallographic microstructure analysis, tensile test and annealing test were carried out for cold rolled pieces; thus......
structure has different initial densification strain point, and its geometric configuration of cells plays an evident role on densification; 2 half-wave length of the wrinkle of honeycomb in folding process significantly influences on the densification strain point; 3 the initial densification point is an decreasing power function of the ratio of foil thickness to cell length, with the exponent 2/3......
several hundred millimeters to several thousand millimeters, and the lengths (Hl, Hr) of fitting body are about 10 mm. The initial length of pipe-billet is determined according to volume constancy... as those of the middle section pipe shown in Fig. 2, and the initial length of pipe-billet is determined according to volume constancy. The two-dimensional finite element (2D-FE) model is adopted......
Effects of coil length on tube compression in electromagnetic forming YU Hai-ping(于海平), LI Chun-feng(李春峰) School of Materials Science and Engineering, Harbin Institute of Technology, Harbin...; Abstract: The effects of the length of solenoid coil on tube compression in electromagnetic forming were investigated either by theory analysis or through......
J. Cent. South Univ. (2019) 26: 3140-3155 DOI: https://doi.org/10.1007/s11771-019-4242-0 Determination of initial cable force of cantilever casting concrete arch bridge using stress balance... to obtain reasonable initial cable force in construction stage. In this study, stress balance and influence matrix methods were developed to determine the initial cable force of cantilever casting concrete......
熔体初生相晶粒尺寸的大小有对应关系. 关键词:初始组织；组织演变；半固态；充型过程 中图分类号:TG 146.4 文献标识码:A Effect of initial structure characteristic on evolution of primary phase in mold filling TAN Jian-bo1..., China; 2. School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China) Abstract: Semi-solid alloy melt with different initial structure prepared......
of dynamically generated matrix consisting of 0’s and 1’s are proposed. Experimental results demonstrate that the generated key-streams are with long enough cycle length and very sensitive to the initial values and secret keys. For example, key-streams with the cycle length of 1032 can easily be obtained. Moreover, even if the fluctuation to the initial values or secret keys is as small as 10-14......
of the void, and the collection of crack and void. The whole evolution process of the system was described in detail from energy evolution map. The effects of loading rate and initial crack length... rate. The longer the initial crack length is, the more unobvious the details of the atomic motion are. Key words: aluminum; crack propagation; molecular dynamics simulation; energy evolution; loading......
-flanging process Fig. 9 Distributions of Vickers hardness in plate section (initial hardness is HV34) 4 Conclusions 1) Considering the insufficient flange height and quality defects... 2014 Abstract: Flange height and lip accuracy are generally restricted by the formability of sheet metals in the conventional hole-flanging operation. A new hole-flanging process, named upsetting......
