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Trans. Nonferrous Met. Soc. China 26(2016) 3161-3169 Effect of carburization on microstructure and rolling contact fatigue property of 95W-3.4Ni-1.6Fe heavy alloy Guang-hong WANG, Sheng-guan QU, Rui... XRD. Effect of carburization on the rolling contact fatigue (RCF) property of the alloy was studied. The results showed that the carburized layer was composed of the outer, porous WC layer......
provide time-varying mesh parameters such as contact points, backlash angle and unloaded transmission error. In this study, it is first applied as a preprocessor for the load distribution analysis... of action: (18) Once the instantaneous contact points are determined at a given input crankshaft angle fin by the unloaded TCA, the unknowns ρc, li and fbli can be calculated. Then, an iterative......
of brake failure on wheel-rail contact stress: Consequently, the contact stress variation induced by the BSAT can reach 210 MPa. In summary, for the attack angle, wheel-rail lateral force and wheel-rail... the straight line and curve, the ABSF may lead to wheelset misaligning motion, intensify the wheel-rail lateral dynamic interaction and deteriorate wheel-rail contact state. Especially......
, rolling radius and contact angle distribution under different gauges 图2 不同轨距下轮轨接触斑内黏滑分布 Fig. 2 Stick-slip distribution in wheel-rail contact patch under different gauges 图3 不同轨距下轮轨接触斑内正应力分布 Fig. 3...速度;为名义滚动角速度,;为接触点在车轮踏面上的横移量. 1.3 轮轨滚动接触力学模型 本文利用Kalker三维非Hertz弹性体滚动接触理论及其数值程序CONTACT求解轮轨滚动接触.该程序将三维接触问题转化为1个离散的数学规划问题,利用Bossinesq-Cerruti力/位移公式,得到其离散形式为[17,19] (2) 式中:为元素I沿i方向上的表面牵引力;I和J为离散化中的元素数;i,j......
Properties of vacuum cast CuCr25 and CuCr25Te contact material XIU Shi-xin(修士新)1, YANG Ren(杨 韧)2, XUE Jun(薛 军)3, WANG Jin-xing(汪金星)3 1. State Key Laboratory of Electrical Insulation...; Abstract: The CuCr25 and CuCr25Te contact materials were manufactured by vacuum casting process. The microstructures of two alloys were observed by metallographic microscope......
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......
Modelling and simulation of contact force in cold rotary forgingQIN Xun-peng(秦训鹏) (School of Automotive Engineering, Hubei Key Laboratory of Advanced Technology of Automotive Parts, Wuhan University of Technology, Wuhan 430070, China)Abstract:Cold rotary forging is an advanced and complex metal forming technology with continuous local plastic deformation. Investigating the contact force between......
that circumferential and longitudinal residual stresses reveal the phenomenon of spiral contact zone, the spiral contact zone makes up an angle of 58° along longitudinal direction, which is the complementary angle of roller’ tilt angle. The distance between the two adjacent contact zone is about 350 mm, which almost equals to the pitch of the straightening roller. Circumferential residual stress......
, 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......