Journal of Tribology-transactions of The Asme最新文献

Experimental investigations on the development of hybrid metal matrix composite of Al7075 on microstructural, mechanical, and dry sliding aspects Al7075杂化金属基复合材料组织、力学和干滑动性能的试验研究

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-11-07 DOI: 10.1115/1.4064020

Bhagwan Singh Lovevanshi, P. K. Soni, Savita Dixit

{"title":"Experimental investigations on the development of hybrid metal matrix composite of Al7075 on microstructural, mechanical, and dry sliding aspects","authors":"Bhagwan Singh Lovevanshi, P. K. Soni, Savita Dixit","doi":"10.1115/1.4064020","DOIUrl":"https://doi.org/10.1115/1.4064020","url":null,"abstract":"Abstract This research work aims to synthesis hybrid Al7075 metal matrix composite reinforced with sustainable and synthetic reinforcement. With the employment of an ultrasonic transducer, two stage stir-casting is used to synthesis composite materials. The prepared samples were machined and polished for mechanical, tribological, and microstructural characterization. Optical microscopy and Field emission scanning electron microscopy with elemental mapping were used to analyses the microstructure of the composite material. The microstructural examination revealed the homogeneous dispersion of reinforcement particles throughout the matrix. With the incorporation of reinforcement, the synthesized composite's compressive strength and micro-hardness were both increased and highest values are found as to be 569.172 MPa and 178.86 HV respectively in one of the sample (B3 sample) as compared to as-cast Al7075 alloy. Tribological examination of composites samples shows that wear rate enhances with increase in content of reinforcement. Wear resistance of sample B3 is highest among all prepared composite samples. Wear debris, grooves, micro-cracks, and small pits were observed on the worn out surfaces of the samples by FESEM analysis.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135432709","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural optimization of the main bearing in a tunnel boring machine considering clearance 考虑间隙的隧道掘进机主轴承结构优化

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-11-07 DOI: 10.1115/1.4064019

Xinqi Wang, Wei Sun, Lintao Wang, Shihu Liang, Xiaokai Mu

{"title":"Structural optimization of the main bearing in a tunnel boring machine considering clearance","authors":"Xinqi Wang, Wei Sun, Lintao Wang, Shihu Liang, Xiaokai Mu","doi":"10.1115/1.4064019","DOIUrl":"https://doi.org/10.1115/1.4064019","url":null,"abstract":"Abstract An optimal design method for the main bearing of a tunnel boring machine is proposed. In this method, the fatigue life is used as the objective function. Structural parameters, including clearance, are considered design variables. First, a quasi-static model of the main bearing and a calculation model of the fatigue life are established. The correctness of the theoretical method is verified by comparing it with the calculation results of the finite element method. Next, the influence of clearance on the load-carrying performance under external loads is analyzed. There is an optimal negative clearance for the axial loaded and radial rows. With the increase in the external loads, the optimal negative clearance gradually decreases. The variation laws of the load-carrying performance for the axial loaded and supporting rows affected by axial clearance mainly depend on the bias load degree of the main bearing. Finally, based on the optimal design model of the main bearing, the optimal internal structure is obtained using the genetic algorithm. The optimized fatigue life is improved by 92.2%. The load-carrying performance of the optimal main bearing has also been significantly enhanced compared to the initial design. Therefore, the proposed optimization method provides a practical approach to the main bearing design.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135433430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recent progress on the tribological applications of solid lubricants 固体润滑剂摩擦学应用的最新进展

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Journal of Tribology-transactions of The Asme Pub Date : 2023-11-02 DOI: 10.1115/1.4063701

Changqing Miao, Bangying Xiong, Kang Yang, Na Xiao, Zihe Shao, Feizhi Zhang, Honglei Zhang, Yahui Xiong, Jun Tang, Hao Chen

引用次数: 0

Improved wear profile modelling of planetary roller screw mechanism with thread optimization 基于螺纹优化的行星滚子螺杆机构磨损轮廓建模方法的改进

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-11-02 DOI: 10.1115/1.4063703

Jiacheng Miao, Xing Du, Chaoyang Li, Bingkui Chen

引用次数: 0

Nano Magnesium silicate hydroxide as synergistic lubricant additive with micro carbon sphere for enhanced tribological properties 纳米硅酸氢氧化镁与微碳球增效润滑剂的摩擦学性能

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-11-02 DOI: 10.1115/1.4063702

Rongqin Gao, Qiuying Chang, Hao Lichun, Yang He

引用次数: 0

Effect of Friction Parameters on Tribological Properties of Erucamide as Grease Additive on GCr15 Steel 摩擦参数对芥兰酰胺作为GCr15钢润滑脂摩擦学性能的影响

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-11-02 DOI: 10.1115/1.4063810

Qingchun Liu, YiMin Mo

{"title":"Effect of Friction Parameters on Tribological Properties of Erucamide as Grease Additive on GCr15 Steel","authors":"Qingchun Liu, YiMin Mo","doi":"10.1115/1.4063810","DOIUrl":"https://doi.org/10.1115/1.4063810","url":null,"abstract":"The present study investigates the effect of friction parameters on tribological properties of erucamide as an additive in grease on GCr15 steel, as well as the sensitivity of erucamide to these parameters. An orthogonal test design is utilized to sample the friction parameters, followed by the construction of a Kriging model to articulate the relationship between these parameters and the designated objectives (average friction coefficient and wear volume). The Non-dominated Sorting Genetic Algorithm II (NSGA-II) is used to optimize the design objectives and verify the accuracy of the model. Monte Carlo method is used to analyze the sensitivity of erucamide to the friction parameters. The results showed that erucamide exhibite excellent tribological properties at 80N/20Hz/25°C and 20N/20Hz/25°C. The sensitivity of erucamide to friction parameters from high to low is temperature, load and speed. This can be ascribed to erucamide's unique structure, encompassing a globular aggregation head and a hydrophobic tail extending outward. The anti-friction effects and lubrication properties of erucamide are driven by its rheological properties and intermolecular interactions. At elevated temperatures, erucamide's fluidity escalates, favoring the lubricating film formation; however, excessive fluidity may impede its adherence to requisite locations, thereby resulting in compromised tribological properties of erucamide at high temperatures.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135874957","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Novel Method of Designing Random Rough Surface Considering Its Contact Force-Deformation Characteristic Requirement 一种考虑随机粗糙表面接触力-变形特性要求的设计新方法

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Journal of Tribology-transactions of The Asme Pub Date : 2023-10-30 DOI: 10.1115/1.4063946

Xuxin Guo, Daxin Liu, Zhenyu Liu, Jianrong Tan

{"title":"A Novel Method of Designing Random Rough Surface Considering Its Contact Force-Deformation Characteristic Requirement","authors":"Xuxin Guo, Daxin Liu, Zhenyu Liu, Jianrong Tan","doi":"10.1115/1.4063946","DOIUrl":"https://doi.org/10.1115/1.4063946","url":null,"abstract":"Abstract The height probability distribution (HPD) of random rough surface topography has significant effect on its contact behaviors. In this paper, an optimization model to calculate the optimal HPD of random rough surface topography to make its contact force-deformation characteristic satisfy the given target force-deformation characteristic was established. In the solution to calculate the optimal HPD, using Bezier interpolation curve to represent the curve of HPD function and using the positions of the control points of Bezier interpolation curve as optimization variables were proposed. The solution was validated by numerical simulations implemented using MATLAB. The effect of the number of the control points on the minimum objective function value was investigated. Through analyzing the obtained result, we found the most appropriate number of the control points is 35. Comparison with the method using height parameters as optimization variables in literature was implemented. It was found that the proposed method is applicable to broader types of contact force-deformation characteristic requirements than the method using height parameters as optimization variables.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136104456","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Vibration Investigation of Roller Element Bearing with Combined Faults using Response Surface Methodology 基于响应面法的组合故障滚动轴承振动试验研究

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-10-30 DOI: 10.1115/1.4063947

Samruddhi Patel, Sanjay Patel

{"title":"Experimental Vibration Investigation of Roller Element Bearing with Combined Faults using Response Surface Methodology","authors":"Samruddhi Patel, Sanjay Patel","doi":"10.1115/1.4063947","DOIUrl":"https://doi.org/10.1115/1.4063947","url":null,"abstract":"Abstract The empirical and mathematical approach is presented in the present paper for multiple distributed and localized flaws analyses in the shaft-rotor-bearing arrangement. These flaws in the combination of inner raceway, outer raceway, and roller are measured for the analysis. To comprehend their relevance and how they affect the vibration response for the shaft-rotor-bearing mechanism, speed, load, and flaws were regarded to be the crucial process factors in this investigation. The Full Factorial method was considered for experimentation, and the experiment was done with the design of experiments (DOE) methodology. The outcomes of the vibration response trials are quantified as Root Mean Square (RMS) values for interpretation. To determine the relationship between the effects of changing process parameters onto the response of vibrations, response surface methodology (RSM) is applied. DOE is used to examine the shaft-rotor-bearing test arrangement, which is employed for exploration. In the present research, it is established how combined parametric effect analysis predicts faults in the shaft-rotor-bearing system and how it affects DOE and RSM.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136104788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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A Mixed Zero-equation and One-equation Turbulence Model in Fluid-film Thrust Bearings 流体膜推力轴承的混合零方程和单方程湍流模型

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-10-30 DOI: 10.1115/1.4063945

Xin Deng

{"title":"A Mixed Zero-equation and One-equation Turbulence Model in Fluid-film Thrust Bearings","authors":"Xin Deng","doi":"10.1115/1.4063945","DOIUrl":"https://doi.org/10.1115/1.4063945","url":null,"abstract":"Abstract A thrust bearing is a rotary bearing that facilitates rotational movement between components and is specifically engineered to provide support for a load that is parallel to the axis of rotation. The generation of the inter-surface film pressure is attributed to the relative motion (rotation) of the surfaces, which results in the lubricant being drawn into the converging wedge formed between them. The interface between the unmovable and moving parts is demarcated by a slender layer of lubricating fluid, including but not limited to oil, water, air, or other process fluid. The conventional zero-equation model can be enhanced to achieve higher precision in forecasting and reduce dependence on empirical data, owing to its inherent limitations. A novel turbulence model that combines zero-equation and one-equation approaches has been developed and implemented in the recently introduced modeling tool package for thrust bearings. In the Prandtl one-equation turbulence model, the length scale is a necessary but undetermined term. A novel mixed model has been implemented utilizing the Prandtl one equation along with a novel length scale. The tool package is a Thermo-hydrodynamic (THD) code that involves iterative computations between the Reynolds' equation, turbulence equation, energy equation within the film, and conduction equation in pad and runner. The new model yields an eddy viscosity that exhibits a substantial level of proximity to both Eddy Viscosity Transport (EVT) and Direct Numerical Simulation (DNS), and exhibits significant enhancements in comparison to the traditional Ng-Pan zero-equation turbulence model.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact elastohydrodynamic lubrication analysis of transversely isotropic materials in point contact 横向各向同性材料点接触冲击弹流润滑分析

3区工程技术

Journal of Tribology-transactions of The Asme Pub Date : 2023-10-19 DOI: 10.1115/1.4063496

Linh Thi Phuong Nguyen, Wang-Long Li

{"title":"Impact elastohydrodynamic lubrication analysis of transversely isotropic materials in point contact","authors":"Linh Thi Phuong Nguyen, Wang-Long Li","doi":"10.1115/1.4063496","DOIUrl":"https://doi.org/10.1115/1.4063496","url":null,"abstract":"Abstract In the traditional elastohydrodynamic lubrication (EHL) field, surface elastic deformation is usually determined using an elastic half-space model for isotropic materials. However, this theory may be inefficient when applied to point contact problems involving inherently anisotropic materials, such as transversely isotropic (TI) materials. Accordingly, the present study proposes a method for solving the EHL point contact problem between a rigid ball and a TI substrate under impact loading using a direct-solving numerical method, in which the mechanical properties of the TI material are expressed in the form of a stiffness matrix. For comparison purposes, the TI material is also approximated as an isotropic material using Turner’s approximation method based on the equivalent modulus property of the material. It is found that the direct-solving method outperforms Turner’s approximation in interpreting the mechanical properties of the TI substrate. In addition, it is shown that the initial velocity of the rigid ball and the stiffness of the TI material (i.e., the transverse elastic modulus, longitudinal modulus, and shear modulus) have significant effects on the load, impact velocity, and acceleration of the ball; central pressure and film thickness of the lubricant; and deformation and von Mises stress of the TI substrate, during the impact process. Overall, the results show that the proposed EHL model provides a useful tool for solving impact-EHL problems involving TI materials.","PeriodicalId":17586,"journal":{"name":"Journal of Tribology-transactions of The Asme","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135667257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0