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dimension and the final internal diameter of workpiece are predicted and the test results verify the reliability of the finite element method.Key words:Hastelloy C-276; vacuum hot bulge forming...FEM analysis of vacuum hot bulge forming of Hastelloy C-276 thin-walled cylindrical workpieceZHU Zhi(朱智), ZHANG Li-wen(张立文), GU Sen-dong(顾森东) (School of Materials Science and Engineering, Dalian......
Adhesive strength of CVD diamond thin films quantitatively measured by means of the bulge and blister testDaohui Xiang1, 2), Ming Chen1), Yuping Ma1), and Fanghong Sun1) 1) School of Mechanical... method for quantitative evaluation of the adhesive strength. The blister test is a potentially powerful tool for characterizing the mechanical properties of diamond films. In this test, pressure......
at two ram speeds. In the wedge test, the expansion was determined by moving a conical punch into the tube until the specimen fracture. In the bulge test, a hydrostatic tensile stress state... location, but the bulge test was more robust and conservative with respect to the wedge test, showing less scattered data. Thus, the performances of a second die for the tube profile, designed to optimize......
. It turns out that the calculated result of total forging pressure is basically in agreement with measured value in the actual press test. Key words: slab forging; bulge; strain rate vector; inner-product... Article ID: 1003-6326(2005)05-1009-05 Solution for slab forging with bulge between two parallel platens by strain rate vector inner-product integration and series expansion ZHAO De-wen(赵德文......
Trans. Nonferrous Met. Soc. China 24(2014) 3265-3273 Accuracy analysis of plane-strain bulge test for determining mechanical properties of thin films Lin YANG1,2, Shi-guo LONG1,2, Zeng-sheng MA1,2... on the deformation behavior of thin films in the plane-strain bulge test was systematically scrutinized by performing the finite element analysis, and then the accuracy of the plane-strain bulge test......
管材自由胀形时胀形区轮廓形状的影响因素林艳丽1,何祝斌1,苑世剑1(1.黑龙江省哈尔滨市哈尔滨工业大学材料科学与工程学院)摘 要:基于中间自由胀形区为椭圆形轮廓线的假设,对管材自由胀形过程进行了理论分析,研究了影响椭圆形状的主要因素及其对测试结果的影响.结果表明,影响椭圆形状的主要因素是管材胀形区长度和约束模具圆角半径.在其它条件一定时,椭圆的长短半轴比值随管材胀形区长度的减小或约束模具圆角半径的增大而减小,即管材胀形后的轮廓线形状从椭圆形逐渐变化为圆形然后又变为扁椭圆形.由胀形实验所得的应力-应变曲线随胀形区......
alloy tubular part with a large expansion ratio. Effects of temperature on the mechanical properties and formability were studied by uniaxial tensile test and hydraulic bulge test. Total elongation... hydroforming; magnesium alloy; tube; expansion ratio; hydraulic bulge test; wrinkle 1 Introduction As the lightest metal material in common use, more and more magnesium alloy sheets and tubes have......
Trans. Nonferrous Met. Soc. China 22(2012) s275-s279 Characterization of plastic behaviour of sheet metals by hydraulic bulge test Lucian , Dan-Sorin , Ioan NICODIM, Ioan CIOBANU, Dorel BANABIC... approach with the experimental data measured by an ARAMIS system. In the hydraulic bulge test using elliptical dies, as the die ellipticity ratio decreases, the equivalent stress-strain curves tend to move......
Effect of temperature on vacuum hot bulge forming of BT20 titanium alloy cylindrical workpiece WANG Ming-wei(王明伟)1, 2, ZHANG Li-wen(张立文)1, 2, PEI Ji-bin(裴继斌)1, 2, LI Chen-hui(李辰辉)3, ZHANG Fan... parameters for BT20 titanium alloy cylindrical workpiece manufactured by vacuum hot bulge forming. A two-dimensional nonlinear thermo-mechanical coupled FE model was established. Numerical simulation......
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