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Contact fatigue life prediction of a bevel gear under spectrum loading
Pan JIA, Huaiju LIU, Caichao ZHU, Wei WU, Guocheng LU
《机械工程前沿（英文）》 2020年 第15卷 第1期 页码 123-132 doi: 10.1007/s11465-019-0556-8
关键词： bevel gear rolling contact fatigue (RCF) multiaxial fatigue criterion load spectrum damage accumulation rule
Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue
Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE
《机械工程前沿（英文）》 2019年 第14卷 第4期 页码 434-441 doi: 10.1007/s11465-018-0474-1
关键词： rolling contact fatigue (RCF) white etching area (WEA) white etching crack (WEC) adiabatic shear band (ASB)
时彧,肖友刚,雷先明
《中国工程科学》 2006年 第8卷 第7期 页码 54-57
建立了非连续接触下筒体-滚圈接触压力的计算模型，得出了滚圈弯矩及弯曲应力计算公式。应用名义应力法和局部应力应变法，建立了滚圈疲劳寿命预测模型。通过实例分析，得出了如下结论：通过调窑，将滚圈的最大支承载荷控制在2500kN以内，能显著提高滚圈的疲劳寿命；在传统设计中，将滚圈支承角定为30°不合理；存在一个最佳滚圈支承角，此时滚圈疲劳寿命最大。
Durability of plasma-sprayed Cr3C2-NiCr coatings under rolling contact conditions
Xiancheng ZHANG, Fuzhen XUAN, Shantung TU, Binshi XU, Yixiong WU
《机械工程前沿（英文）》 2011年 第6卷 第1期 页码 118-135 doi: 10.1007/s11465-011-0127-0
The aim of this paper was to address the rolling contact fatigue (RCF) failure mechanisms of plasma-sprayed Cr3C2-NiCr coatings under different tribological conditions of contact stress. Weibull distribution plots of fatigue lives of the coated specimens at different contact stresses were obtained. The failure modes of coatings were identified on the basis of wore surface observations of the failed coatings. Results showed that the RCF failure modes can be classified into four main categories, i.e., surface abrasion, spalling, cohesive delamination, and interfacial delamination. The probabilities of the surface abrasion and spalling type failures were relatively high at low contact stress. When the coatings were subjected to abrasion and spalling type failures, the failure of the coating was depended on the microstrcture of the coating. The stress concentration near the micro-defects in the coating may be the may reason for the formation of spall. The coatings were prone to fail in delamination under higher contact stresses. However, the delamination of coating may be related to distribution of shear stress amplitude within coating. The location of maximum shear stress amplitude can be used as a key parameter to predict the initiation of subsurface cracks within coating in rolling contact.
关键词： rolling contact fatigue coating Weibull distribution failure mode mechanism
Jia XU,Zhen-yu ZHOU,Zhong-yu PIAO
《机械工程前沿（英文）》 2016年 第11卷 第3期 页码 227-232 doi: 10.1007/s11465-016-0395-9
The accumulated damage process of rolling contact fatigue (RCF) of plasma-sprayed coatings was investigated. The influences of surface roughness, loading condition, and stress cycle frequency on the accumulated damage status of the coatings were discussed. A ball-on-disc machine was employed to conduct RCF experiments. Acoustic emission (AE) technique was introduced to monitor the RCF process of the coatings. AE signal characteristics were investigated to reveal the accumulated damage process. Result showed that the polished coating would resist the asperity contact and remit accumulated damage. The RCF lifetime would then extend. Heavy load would aggravate the accumulated damage status and induce surface fracture. Wear became the main failure mode that reduced the RCF lifetime. Frequent stress cycle would aggravate the accumulated damage status and induce interface fracture. Fatigue then became the main failure mode that also reduced the RCF lifetime.
关键词： accumulated damage spray coating rolling contact fatigue acoustic emission
刘自权,谭小东,杨小龙,许云波,吴迪,王国栋
《中国工程科学》 2014年 第16卷 第1期 页码 54-58
对比研究了现场不同工艺所得碳锰系车轮用钢及低碳低硅含磷铬系相变诱发塑性（TRIP）钢的力学性能、微观组织、疲劳性能和疲劳断口。结果显示，较传统碳锰系车轮用钢，新型TRIP 钢具有相当的屈服强度，抗拉强度明显提高了100~150 MPa，疲劳极限提高了50~140 MPa。疲劳极限随抗拉强度的提高有增大趋势。铁素体、贝氏体、残余奥氏体组织较铁素体、贝氏体、珠光体组织和铁素体、珠光体、马奥岛组织具有更好的疲劳性能。
Zhengyi JIANG,
《机械工程前沿（英文）》 2010年 第5卷 第1期 页码 52-60 doi: 10.1007/s11465-009-0087-9
关键词： rib inclined contact boundary condition ribbed strip extremely thin elements pulling down of rib height finite element modelling
An improved algorithm for McDowell’s analytical model of residual stress
null
《机械工程前沿（英文）》 2014年 第9卷 第2期 页码 150-155 doi: 10.1007/s11465-014-0295-9
The analytical model for two-dimensional elastoplastic rolling/sliding contact proposed by McDowell is an important tool for predicting residual stress in rolling/sliding processes. In application of the model, a problem of low predicting precision near the surface layer of the component is found. According to the volume-constancy of plastic deformation, an improved algorithm for McDowell’s model is proposed in order to improve its predicting accuracy of the surface residual stress. In the algorithm, a relationship between three normal stresses perpendicular to each other at any point within the component is derived, and the relationship is applied to McDowell’s model. Meanwhile, an unnecessary hypothesis proposed by McDowell can be eliminated to make the model more reasonable. The simulation results show that the surface residual stress predicted by modified method is much closer to the FEM results than the results predicted by McDowell’s model under the same simulation conditions.
关键词： residual stress McDowell’s model volume-constancy of plastic deformation FEM elastoplastic rolling/sliding contact
Application of Cu nanoparticles as N32 base oil additives
Qiang HE, Jun YE, Hongzhao LIU, Jinling LI,
《机械工程前沿（英文）》 2010年 第5卷 第1期 页码 93-97 doi: 10.1007/s11465-009-0083-0
关键词： Cu nanoparticle tribological property contact fatigue weibull distribution
A rolling 6U parallel mechanism
Zhihuai MIAO, Yanan YAO
《机械工程前沿（英文）》 2011年 第6卷 第1期 页码 96-98 doi: 10.1007/s11465-011-0214-2
Novel probabilistic rolling regular tetrahedron mechanism
Yonghan GUAN, Yan’an YAO, Chao LIU, Ruiming LI
《机械工程前沿（英文）》 2021年 第16卷 第2期 页码 363-378 doi: 10.1007/s11465-020-0628-9
关键词： mobile mechanism probabilistic motion rolling mechanism stochastic motion
Thin-liquid-film evaporation at contact line
Hao WANG, Zhenai PAN, Zhao CHEN
《能源前沿（英文）》 2009年 第3卷 第2期 页码 141-151 doi: 10.1007/s11708-009-0020-2
关键词： meniscus thin film contact line disjoining pressure evaporation
A rolling 3-UPU parallel mechanism
Zhihuai MIAO, Yan’an YAO, Xianwen KONG
《机械工程前沿（英文）》 2013年 第8卷 第4期 页码 340-349 doi: 10.1007/s11465-013-0282-6
A novel rolling mechanism is proposed based on a 3-UPU parallel mechanism in this paper. The rolling mechanism is composed of two platforms connected by three UPU (universal-prismatic-universal) serial-chain type limbs. The degree-of-freedom of the mechanism is analyzed using screw theory. Gait analysis and stability analysis are presented in detail. Four rolling modes of the mechanism are discussed and simulated. The feasibility of the rolling mechanism is verified by means of a physical prototype. Finally, its terrain adaptability is enhanced through planning the rolling gaits.
Modelling of dynamic contact length in rail grinding process
null
《机械工程前沿（英文）》 2014年 第9卷 第3期 页码 242-248 doi: 10.1007/s11465-014-0305-y
Rails endure frequent dynamic loads from the passing trains for supporting trains and guiding wheels. The accumulated stress concentrations will cause the plastic deformation of rail towards generating corrugations, contact fatigue cracks and also other defects, resulting in more dangerous status even the derailment risks. So the rail grinding technology has been invented with rotating grinding stones pressed on the rail with defects removal. Such rail grinding works are directed by experiences rather than scientifically guidance, lacking of flexible and scientific operating methods. With grinding control unit holding the grinding stones, the rail grinding process has the characteristics not only the surface grinding but also the running railway vehicles. First of all, it’s important to analyze the contact length between the grinding stone and the rail, because the contact length is a critical parameter to measure the grinding capabilities of stones. Moreover, it’s needed to build up models of railway vehicle unit bonded with the grinding stone to represent the rail grinding car. Therefore the theoretical model for contact length is developed based on the geometrical analysis. And the calculating models are improved considering the grinding car’s dynamic behaviors during the grinding process. Eventually, results are obtained based on the models by taking both the operation parameters and the structure parameters into the calculation, which are suitable for revealing the process of rail grinding by combining the grinding mechanism and the railway vehicle systems.
关键词： rail grinding contact length dynamic model Hamiltonian system grinding stone rail grinding car
Research and industrialization of near-net rolling technology used in shaft parts
Zhenghuan HU, Baoyu WANG, Zhenhua ZHENG
《机械工程前沿（英文）》 2018年 第13卷 第1期 页码 17-24 doi: 10.1007/s11465-018-0480-3
Shaft part rolling is an efficient and green near-net shaping technology offering many advantages, including high production efficiency, high material utilization rate, high product quality, and excellent production environment. In this paper, the features of shaft part rolling are introduced along with the working principles of two main shaft part rolling technologies, namely, cross wedge rolling (CWR) and skew rolling (SR). In relation to this technology, some R&D achievements gained by the University of Science and Technology Beijing are summarized. Finally, the latest developments in shaft part rolling are presented, including SR steel balls, precise forming of camshaft blank by CWR, SR phosphorous copper balls at room temperature, and CWR hollow axle sleeve. Although the shaft part rolling technology has been widely used in China, it only accounts for about 15% of applicable parts at present. Nevertheless, this technology has broad application prospects.
关键词： cross wedge rolling skew rolling near-net rolling shaft part
标题 作者 时间 类型 操作
Contact fatigue life prediction of a bevel gear under spectrum loading
Pan JIA, Huaiju LIU, Caichao ZHU, Wei WU, Guocheng LU
期刊论文
Review of the damage mechanism in wind turbine gearbox bearings under rolling contact fatigue
Yun-Shuai SU, Shu-Rong YU, Shu-Xin LI, Yan-Ni HE
期刊论文
Durability of plasma-sprayed Cr3C2-NiCr coatings under rolling contact conditions
Xiancheng ZHANG, Fuzhen XUAN, Shantung TU, Binshi XU, Yixiong WU
期刊论文
Accumulated damage process of thermal sprayed coating under rolling contact by acoustic emission technique
Jia XU,Zhen-yu ZHOU,Zhong-yu PIAO
期刊论文
Ribbed strip rolling by three-dimensional finite element method combining extremely thin array of elements
Zhengyi JIANG,
期刊论文
Application of Cu nanoparticles as N32 base oil additives
Qiang HE, Jun YE, Hongzhao LIU, Jinling LI,
期刊论文
Novel probabilistic rolling regular tetrahedron mechanism
Yonghan GUAN, Yan’an YAO, Chao LIU, Ruiming LI
期刊论文
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