共搜索到7653条信息,每页显示10条信息,共766页。用时:0小时0分0秒374毫秒
were analyzed and summarized using statistical analyses. The results demonstrate that the main types of contact among the particles are face-face, face-angle, face-edge, edge-edge, edge-angle and angle... structures. Figures 7(a2), (A2), (b2) and (B2) show that the main contact types among the particles were face-face, face-angle, face-edge, edge-edge, edge-angle and angle-angle contacts. In addition......
, and the orientation angle of the contact path is the smallest for reason of less mismatch at the top and root edges of tooth surfaces. 2) The shape and position of the contact bearings of Case 2 and Case 3... profile on meshing and contact of spiral bevel and hypoid gears were investigated analytically. Firstly, a mathematical model of spiral bevel and hypoid gears with circular blade profile was established......
Influence on Rolling Contact Fatigue Life of GCr15 Steel Treated by Plasma Immersion Ion Implantation TANG Bao-yin1,SUN Tao1,LIU Dan1,HU Li-guo2,WNAG Lang-ping1,WNAG Xiao-feng1 (1.State key lab...-on-rod testing, the rolling contact fatigue (RCF) life of GCr15 steel treated by PIII technique was studied. During the study, nitrogen plasma was generated and the implantation voltage was varied from 20......
Microstructure and properties of CuCr contact materials with different Cr contentXIU Shi-xin1, YANG Ren2, XUE Jun3, WANG Jin-xing3, WANG Jia-yi1(1. State Key Laboratory of Electrical Insulation...:In order to study effect of Cr content on microstructure and properties of CuCr contact material, three different Cr content contact materials, named CuCr25, CuCr30 and CuCr40, were manufactured by vacuum......
. The interface friction angle and adhesion between the contact surfaces were modeled by assigning a suitable value for the strength reduction factor at the interface compared with the corresponding soil strengths... footings adjacent slopes, 2) suggest an optimum number of reinforcement and 3) survey the effect of friction angle in clayey soils reinforced by geogrids. The investigations were carried out......
of the flat jet with an inclination angle was investigated by a water model. A mathematical model for the shrinkage and the trajectory of the flat jet with an inclination angle was derived theoretically and verified by experimental data of the water model. The experimental results indicate that the inclination angle (α) has no influence on the shrinkage of the flat jet, the shrinkage of the flat jet along......
J. Cent. South Univ. (2012) 19: 953-961 DOI: 10.1007/s11771-012-1097-z Numerical assessment on improving multistage centrifugal impeller performance by changing inlet skew angle at impeller inlet M... is to investigate the influences of lean angle at the blade tip of the impeller inlet. Four variations of lean angles, that is, 8°, 10°, 15° and 20°, were made at first stage impeller. Reynolds Average Navier Stokes......
surface, around which the tangent plane of the intrusive body is approximately consistent with the trend surface; (3) the contact zones with angle between intrusive body original contact surface and trend contact surface ranging from 35° to 70°; (4) the parts with angle between intrusive body original contact surface and regional extruding far crustal stress ranging from 50° to 60......
J. Cent. South Univ. (2012) 19: 517-521 DOI: 10.1007/s11771-012-1034-1
tooth radius to avoid undercutting is (Rr)max=13.04 mm. 3 Contact stress 3.1 Contact force between rotors Figure 4 shows a specific unit of the inner-rotor running angle of θ3=22.5° (θ2=20... 2011 Abstract: The wear rate between the rotors of a hypotrochoidal gear pump is characterized. Using the knowledge of shape design on the rotors, the contact stresses without hydrodynamic effect......