共搜索到23645条信息,每页显示10条信息,共2365页。用时:0小时0分0秒578毫秒
Forming characteristics of thin-walled tube bending process with small bending radius LI Heng(李 恒) , YANG He(杨 合), ZHAN Mei(詹 梅), GU Rui-Jie(谷瑞杰) Department of Materials Forming... bending radius cause the defects such as wrinkling, overthinning and cross-section distortion more prone to occur in bending process. Based on the analysis of the forming characteristics by analytical......
Creep of Sn-9Zn as Measured by a Bending Test Method魏秀琴,周浪School of Materials Science & Engineering,Nanchang University摘 要:A bending creep setup was introduced and its feasibility to evaluate creep behavior of materials was experimentally verified on pure Sn.Thereby,the creep of eutectic Sn-9Zn was studied.It was identified that high and low stress......
disturbance effects of red sandstone rock beam and oil shale rock beam were studied by adopting the self-developed gravitation level style rock creep test machine and bending creep test system... been conducted yet. Bending test is simple and practicable. In addition, this method can be conveniently applied to disturbance loads. The aim of this paper is to investigate the mechanics properties......
; r is the round radius of the mandrel; t is the tube wall thickness; and R is the centerline bending radius. In particular, for the tubes with extremely low elongation percentage, test bending after... Effects of process parameters on numerical control bending process for large diameter thin-walled aluminum alloy tubes LI Cheng(李 成)1, YANG He(杨 合)1, ZHAN Mei(詹 梅)1, XU Xu-dong(许旭东)2......
sheet/powders precursor. Bending fatigue test results showed that the bonding force of the foamed sandwich interface is very high, in fatigue test fracture occurred in the whole foam aluminum sandwich...Study on the Interface Bonding and Bending Fatigue Properties of Aluminum Alloy Foam Sandwich () 摘要:Foam materials have many attractive properties because of their low-weight and cell structure......
distance should be reduced to improve the service life of PDC cutters. Key words: polycrystalline diamond compact; failure analysis; breaking test; energy theory of bending waves  .... At the same time, it is known that the cutting force is an impact harmonic wave according to the results of test. So the bending breakage of the cutter can be analyzed and calculated by the energy......
Precision bending of high-quality components for volume applications T. WELO, F. WIDER?E Department of Engineering Design and Materials, Norwegian University of Science and Technology... bending operations, including flexible stretch forming and 3D rotary stretch forming. Attempts were made to give an overview of different mechanisms that influence dimensional accuracy, including local......
J. Cent. South Univ. Technol. (2007)01-0135-05 DOI: 10.1007/s11771-007-0027-y Dynamic analysis and modal test..., respectively. An identification method about modal parameters was put forward by combining method of peak value and power spectral density according to modal test under ambient excitation. The dynamic......
not measured. All amplitude values and those to thickness ratios of the above imperfections are listed in Table 3. 2.4 Test setup and gauge arrangement The schematic diagrams of pure bending and non- pure bending tests are shown in Fig. 2. Both bending states have the equal research span length of 600 mm. For pure bending test, the constant moment span is between two loading points (Fig. 2......
is listed in Table 1. The specimen will be moved in 10s to reach the inclined surface. The bending length will be measured. Fig.4 Schematic map of cantilever test Sewing...° to the test direction; Stitch type: Lock-stitch; Needle thickness: 110nm. The bending stiffness will be calculated with the following equations: Table 1 ......