Friction最新文献_第6页

Wear protection assessment of ultralow viscosity lubricants in high-power-density engines: A novel wear prediction algorithm 超低粘度润滑油在高功率密度发动机中的磨损保护评估：新型磨损预测算法

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-25 DOI: 10.1007/s40544-023-0854-3

Javier Blanco-Rodríguez, Jacobo Porteiro, José A. López-Campos, Martí Cortada-García, Silvia Fernández-Castejón

{"title":"Wear protection assessment of ultralow viscosity lubricants in high-power-density engines: A novel wear prediction algorithm","authors":"Javier Blanco-Rodríguez, Jacobo Porteiro, José A. López-Campos, Martí Cortada-García, Silvia Fernández-Castejón","doi":"10.1007/s40544-023-0854-3","DOIUrl":"https://doi.org/10.1007/s40544-023-0854-3","url":null,"abstract":"Durability and reliability have been studied for decades through intensive trial-error experimentation. However, there are numerous fields of application where the costs associated with this approach are not acceptable. In lubricated machines with severe dynamic loads, such as high-power-density engines, simulation tools offer clear advantages over intensive testing. Prototypes and multiple scenarios can be cost-effectively simulated to assess different lubricants and engine configurations. The work presented here details the study of wear based on a validated elastohydrodynamic (EHD) simulation model of the connecting rod journal bearing. This model accounts for elastic deformation through a connecting rod finite element model (FEM). In addition, multiple lubricant rheological and tribological dependences, determined by specific experimental tests, are applied in the model through their interaction with the simulation software. Correspondingly, a novel wear algorithm is proposed to predict wear depth over time evolution along a proposed wear cycle based on the typical working ranges of high-performance engines. A final assessment is presented to compare 4 different ultralow-viscosity lubricants in their protective performance under severe conditions. The results show the evolution of the wear load and wear depth over the wear cycle. This evaluation is key to describing a lubricant selection procedure for high-power-density engines.\u0000","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141096762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Tribological evaluation of thermoplastic polyurethane-based bearing materials under water lubrication: Effect of load, sliding speed, and temperature 水润滑条件下热塑性聚氨酯基轴承材料的摩擦学评估：载荷、滑动速度和温度的影响

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-25 DOI: 10.1007/s40544-023-0856-1

Shaoli Jiang, Janet S. S. Wong, Debashis Puhan, Tian Yuan, Xiuqin Bai, Chengqing Yuan

{"title":"Tribological evaluation of thermoplastic polyurethane-based bearing materials under water lubrication: Effect of load, sliding speed, and temperature","authors":"Shaoli Jiang, Janet S. S. Wong, Debashis Puhan, Tian Yuan, Xiuqin Bai, Chengqing Yuan","doi":"10.1007/s40544-023-0856-1","DOIUrl":"https://doi.org/10.1007/s40544-023-0856-1","url":null,"abstract":"Polymers are widely used in bearing applications. In the case of water-lubricated stern tube bearings, thermoplastic polyurethane (TPU)-based composites are used due to their excellent wear resistance, corrosion resistance, and tunable mechanical properties. Their tribological performance, however, depends on operating conditions. In this work, TPU was blended with carbon fiber, graphene platelet, and ultra-high molecular weight polyethylene (UHMWPE). Friction tests of TPU based-composites against copper countersurface were carried out in water to mimic the actual operating conditions of the bearing. Most of the resulting contacts were in the boundary lubrication regime, in which friction was attributed to both contact mechanics of asperities as well as water lubrication. Our results show that the viscoelasticity of TPU has a considerable impact on its tribological performance. Water lubrication at 50 °C promotes the softening of polymer surface material during sliding, resulting in higher fluctuation in the coefficient of friction and wear loss. This is attributed to the reduced thermomechanical properties. In addition, Schallamach waviness is observed on worn surface. The tribological properties of TPU are significantly improved by the inclusion of carbon fiber, graphene platelet, and UHMWPE. The formation of graphene transfer-layers and UHMWPE transfer film reduces friction and wear loss, while the inclusion of carbon fiber enhances wear resistance due to improved mechanical properties and load bearing capacity.\u0000","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141096666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Flexible metal–organic frameworks based self-lubricating composite 基于金属有机框架的柔性自润滑复合材料

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-25 DOI: 10.1007/s40544-023-0857-0

Xiao Yang, Yunbo Wang, Weihua Cao, Jinghan Zheng, Changxin Liu, Bingli Fan, Xiaowen Qi

引用次数: 0

The effect of electrical current on lubricant film thickness in boundary and mixed lubrication contacts measured with ultrasound 用超声波测量电流对边界和混合润滑接触中润滑油膜厚度的影响

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-23 DOI: 10.1007/s40544-024-0890-7

Julio A. Cao-Romero-Gallegos, Saeid Taghizadeh, Oscar A. Aguilar-Rosas, R. S. Dwyer-Joyce, Leonardo I. Farfan-Cabrera

{"title":"The effect of electrical current on lubricant film thickness in boundary and mixed lubrication contacts measured with ultrasound","authors":"Julio A. Cao-Romero-Gallegos, Saeid Taghizadeh, Oscar A. Aguilar-Rosas, R. S. Dwyer-Joyce, Leonardo I. Farfan-Cabrera","doi":"10.1007/s40544-024-0890-7","DOIUrl":"https://doi.org/10.1007/s40544-024-0890-7","url":null,"abstract":"This work explores experimentally the effects of DC electrical currents on lubricant film thickness alteration in lubricated sliding steel contacts in the boundary and mixed regime as measured by ultrasound. The experiments were performed in a two-electrode cell-based pin-on-disk tester instrumented with ultrasonic transducers. Unelectrified and electrified tribological tests were conducted on steel flat-on-flat contacts under various speeds and loads using both a mineral base oil and a gear oil. Film thickness, coefficient of friction (CoF), and electrical contact resistance (ECR) were measured during short experiments (30 s) in unelectrified and electrified (1.5 and 3 A) conditions. The results suggest that film thickness, CoF, and all ECR are altered by passing DC currents through the contact. In particular, film thickness increased and decreased, respectively, by applying electricity at the different speeds and loads tested. These alterations were majorly ascribed to oil viscosity decrease by local heat and surface oxidation caused by electrical discharge and break down at the interface.","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141085366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Boundary-lubricated biomaterials with drug delivery for osteoarthritis treatment 用于骨关节炎治疗的边界润滑生物材料与药物输送

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-23 DOI: 10.1007/s40544-024-0874-7

Junyu Wu, Kaixuan Ren, Jingbo Yin

引用次数: 0

Screening of low-friction two-dimensional materials from high-throughput calculations using lubricating figure of merit 利用润滑功勋值通过高通量计算筛选低摩擦二维材料

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-23 DOI: 10.1007/s40544-024-0901-8

Kewei Tang, Weihong Qi, Guoliang Ru, Weimin Liu

{"title":"Screening of low-friction two-dimensional materials from high-throughput calculations using lubricating figure of merit","authors":"Kewei Tang, Weihong Qi, Guoliang Ru, Weimin Liu","doi":"10.1007/s40544-024-0901-8","DOIUrl":"https://doi.org/10.1007/s40544-024-0901-8","url":null,"abstract":"Two-dimensional materials are excellent lubricants with inherent advantages. However, superlubricity has been reported for only a few of these materials. Unfortunately, other promising two-dimentional (2D) materials with different physical properties cannot be discovered or applied in production; thus, energy consumption can be greatly reduced. Here, we carry out high-throughput calculations for 1,475 2D materials and screen for low-friction materials. To set a standard, we propose, for the first time, a geometry-independent lubricating figure of merit based on the conditions for stick-slip transition and our theory of Moiré friction. For the efficient calculation of this figure of merit, an innovative approach was developed based on an improved registry index model. Through calculations, 340 materials were found to have a figure of merit lower than 10−3. Eventually, a small set of 21 materials with a figure of merit lower than 10−4 were screened out. These materials can provide diverse choices for various applications. In addition, the efficient computational approach demonstrated in this work can be used to study other stacking-dependent properties.","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141085462","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Topology optimization of AISI 4140 steel with surface texture filled by multi-solid lubricants for enhancing tribological properties 采用多固体润滑剂填充表面纹理的 AISI 4140 钢的拓扑优化，以提高摩擦学性能

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-07 DOI: 10.1007/s40544-024-0863-x

Qipeng Huang, Chaohua Wu, Xiaoliang Shi, Kaipeng Zhang

{"title":"Topology optimization of AISI 4140 steel with surface texture filled by multi-solid lubricants for enhancing tribological properties","authors":"Qipeng Huang, Chaohua Wu, Xiaoliang Shi, Kaipeng Zhang","doi":"10.1007/s40544-024-0863-x","DOIUrl":"https://doi.org/10.1007/s40544-024-0863-x","url":null,"abstract":"Wind power gears will be excessively worn due to lubrication failure during operation. Herein, the tribological properties of rubbing pairs are improved by filling solid lubricants into surface texture. In texture design, three types of topological textures (Circle (C), Hexagon (H) and Circle/Hexagon (CH)) were obtained by cell topology optimization, and then three cases with 20%, 30%, and 40% density were designed for each texture. Next, SnAgCu and TiC were deposited in texture of AISI 4140 steel (AS) to obtain 9 kinds of self-lubricating surfaces. Among them, AS with 30% CH density (AS-CH30) exhibits excellent mechanical and tribological properties. Compared with AS-C and AS-H, the maximum equivalent stress of AS-CH was decreased by 10.86% and 5.37%, respectively. Friction coefficient and wear rate of AS-CH30 were 79.68% and 78% lower than those of AS. The excellent tribological performances of AS-CH30 can be attributed to the synergistic effect of topological surface and solid lubricants. Topological surface can not only reduce fluctuation of equivalent stress, but also promote the stored lubricants to be easily transferred at the contact interface to form a 200 nm lubricating film containing solid lubricants (mainly), oxides and wear debris.\u0000","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140845176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Anisotropic tribology and electrification properties of sliding-mode triboelectric nanogenerator with groove textures 具有凹槽纹理的滑动模式三电纳米发电机的各向异性摩擦学和电气化特性

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-07 DOI: 10.1007/s40544-024-0861-z

Weixu Yang, Jieyang Wang, Xiaoli Wang, Ping Chen

{"title":"Anisotropic tribology and electrification properties of sliding-mode triboelectric nanogenerator with groove textures","authors":"Weixu Yang, Jieyang Wang, Xiaoli Wang, Ping Chen","doi":"10.1007/s40544-024-0861-z","DOIUrl":"https://doi.org/10.1007/s40544-024-0861-z","url":null,"abstract":"Sliding-mode triboelectric nanogenerator (S-TENG) is based on the coupling of triboelectrification and electrostatic induction, converting electrical energy from sliding motion. Introducing micro-textures into the sliding surface, and adjusting the angle between the texture and sliding direction (direction angle) may achieve performance anisotropy, which provides novel ideas for optimizing the tribology and electrification performance of S-TENG. To guide the performance optimization based on the anisotropy, in this paper, groove micro-textures were fabricated on the surface of S-TENG, and anisotropic tribology and electrification performance were obtained through changing the direction angle. Based on the surface analysis and after-cleaning tests, the mechanism of the anisotropy was explained. It is shown that the anisotropy of friction coefficient can be attributed to the changes of texture edge induced resistance and groove captured wear debris, while the voltage anisotropy is due to the variations of debris accumulated on the sliding interface and the resulting charge neutralization. Among the selected 0°–90° direction angles, S-TENG at angle of 90° exhibits relatively small stable friction coefficient and high open-circuit voltage, and thus it is recommended for the performance optimization. The open-circuit voltage is not directly associated with the friction coefficient, but closely related to the wear debris accumulated on the sliding interface. This study presents a simple and convenient method to optimize the performance of S-TENG, and help understand the correlation between its tribology and electrical performance.\u0000","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140845293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Tribological properties of Al-GNP composites at elevated temperature 高温下 Al-GNP 复合材料的摩擦学特性

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-01 DOI: 10.1007/s40544-023-0839-2

{"title":"Tribological properties of Al-GNP composites at elevated temperature","authors":"","doi":"10.1007/s40544-023-0839-2","DOIUrl":"https://doi.org/10.1007/s40544-023-0839-2","url":null,"abstract":"<h3>Abstract</h3> Lighter and more powerful next generation vehicles and other rotary machinery demand bearings to operate in harsher conditions for higher efficiency, and the continuous development of advanced low-wear and friction materials is thus becoming even more important to meet these requirements. New aluminium composites reinforced with high performance lubricate phases such as graphene nanoplatelets (GNPs) are very promising and have been vigorously investigated. By maintaining a low coefficient of friction (COF) and offering great strength against wear due to their self-lubricating capability, the solid lubricant like GNPs protect the bearing surface from wear damage and prevent change in metallurgical properties during temperature fluctuations. This paper first studies the high-temperature tribological performance of aluminium matrix composites reinforced with GNP, consolidated via powder metallurgy, then elucidates their tribological mechanism. We report that the best tribological performance is achieved by the composite containing 2.0 wt% GNP, with an extraordinarily low COF of 0.09 and a specific wear rate of 3.5×10−2 mm3·N−1·m−1, which represent 75% and 40% reduction respectively, against the plain aluminium consolidated under identical conditions. The in-track and out-of-track Raman analysis have confirmed the role of GNPs in creating a tribofilm on the counterpart surface which contributed to the excellent performance. <img alt=\"\" src=\"https://static-content.springer.com/image/MediaObjects/40544_2023_839_Fig1_HTML.jpg\"/> ","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139710670","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Core-rim structured MXene@SiO2 composites as oil-based additives for enhanced tribological properties 作为油基添加剂的芯环结构 MXene@SiO2 复合材料可增强摩擦学性能

IF 6.8 1区工程技术

Friction Pub Date : 2024-05-01 DOI: 10.1007/s40544-023-0840-9

Yuhong Cui, Shenghua Xue, Tiantian Wang, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu

{"title":"Core-rim structured MXene@SiO2 composites as oil-based additives for enhanced tribological properties","authors":"Yuhong Cui, Shenghua Xue, Tiantian Wang, Shujuan Liu, Qian Ye, Feng Zhou, Weimin Liu","doi":"10.1007/s40544-023-0840-9","DOIUrl":"https://doi.org/10.1007/s40544-023-0840-9","url":null,"abstract":"Herein, we have prepared SiO2 particles uploaded MXene nanosheets via in-situ hydrolysis of tetraetholothosilicate. Due to the large number of groups at the edges of MXene, SiO2 grows at the edges first, forming MXene@SiO2 composites with a unique core-rim structure. The tribological properties of MXene@SiO2 as lubricating additive in 500 SN are evaluated by SRV-5. The results show that MXene@SiO2 can reduce the friction coefficient of 500 SN from 0.572 to 0.108, the wear volume is reduced by 73.7%, and the load capacity is increased to 800 N. The superior lubricity of MXene@SiO2 is attributed to the synergistic effect of MXene and SiO2. The rolling friction caused by SiO2 not only improves the bearing capacity but also increases the interlayer distance of MXene, avoiding accumulation and making it more prone to interlayer slip. MXene@SiO2 is adsorbed on the friction interface to form a physical adsorption film and isolate the friction pair. In addition, the high temperature and high load induce the tribochemical reaction and form a chemical protection film during in the friction process. Ultimately, the presence of these protective films results in MXene@SiO2 having good lubricating properties.","PeriodicalId":12442,"journal":{"name":"Friction","volume":null,"pages":null},"PeriodicalIF":6.8,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140819300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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