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变载荷下SiC多孔陶瓷的摩擦磨损性能研究

Research on Friction and Wear Properties of SiC Porous Ceramics under Variable Load
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摘要 在改进后的MMS-2A微机控制摩擦磨损试验机上研究变载荷下SiC多孔陶瓷的摩擦磨损性能,通过变载荷和静载荷试验对比分析变载荷对摩擦因数的影响及变载荷下多孔陶瓷的磨损机制。结果表明,变载荷下随着载荷增大SiC多孔陶瓷摩擦因数减小,SiC多孔陶瓷的磨损机制为脆性断裂和磨粒磨损。建立多孔陶瓷和45#钢的环-块摩擦副几何模型,运用有限元分析软件ANASYS Workbench仿真分析变载荷对接触应力的影响。结果表明,SiC多孔陶瓷的接触应力分布不均匀,并且接触应力呈现环-块接触的垂直轴线区域大、两侧小的状态,其中最大接触应力出现在与块接触区域,环和块的最大接触应力位置错开一定的距离。 The friction and wear properties of SiC porous ceramics under variable load was studied on the improved MMS-2A microcomputer control friction and wear testing machine.The effect of variable load on the friction coefficient and wear mechanism of SiC porous ceramics was analyzed through the friction and wear test under variable load and static load. The results show that the friction coefficient of SiC porous ceramics is decreased with the increasing of load under variable load.The wear mechanism of SiC porous ceramics is abrasive wear and brittle fracture.The geometric model of ring-block friction pairs was established with porous ceramic as ring and 45 steel as block, the effect of the variable load on the con- tact stress was analyzed by using the finite element analysis software ANASYS Workbench.The results show that pressure distribution on the contact interface of SiC porous ceramics is not uniform,the pressure is large in the ring-block contact area of the vertical axis and small in both sides.The maximum contact stress appears in and block contact area, the position of ring-block maximum contact stress is staggered a certain distance.
出处 《润滑与密封》 CAS CSCD 北大核心 2017年第3期86-89,共4页 Lubrication Engineering
基金 2015年上海工程技术大学研究生科研创新项目(E309031601016)
关键词 变载荷 SIC多孔陶瓷 摩擦因数 磨损机制 variable load SiC porous ceramics friction coefficient wear mechanism
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