Friction最新文献_第2页

Analytical model for revealing tool wear law during edge trimming of carbon fiber reinforced plastics composites

IF 6.8 1区工程技术

Friction Pub Date : 2025-04-03 DOI: 10.26599/frict.2025.9440992

Yue Li, Hongyan Zhou, Boyu Zhang, Kai Sun, Xigao Jian

{"title":"Analytical model for revealing tool wear law during edge trimming of carbon fiber reinforced plastics composites","authors":"Yue Li, Hongyan Zhou, Boyu Zhang, Kai Sun, Xigao Jian","doi":"10.26599/frict.2025.9440992","DOIUrl":"https://doi.org/10.26599/frict.2025.9440992","url":null,"abstract":"This study proposes a novel tool wear model for the edge trimming process of carbon fiber-reinforced plasticities (CFRPs). The main innovation is that the model considers the actual wear state of both the planar flank face and the semicylindrical cutting edge. In addition, for the whole wear process, the model illustrates the dynamic wear condition by introducing a varying wear coefficient determined by the instantaneous force‒temperature condition and relative movement distance. The analytical results of the tool wear law suggest that cutting edge wear depends on tool nose rigidity and the practical contact distance with the CFRP workpiece mainly. To suppress cutting edge wear, reducing the rake angle and flank angle to improve rigidity and selecting a low spindle speed and high feed rate to decrease the practical cutting distance are recommended. The wear of the flank face is mainly determined by the flank angle and bouncing back height of the machined surface. To reduce its wear, a large flank angle, high spindle speed, and low feed rate are recommended. Since the strategies for reducing the wear of the cutting edge and flank faces are contradictory, to reduce tool wear more effectively, reducing cutting-edge wear is prioritized.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"33 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143766918","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

A distinctive material removal mode in chemical mechanical polishing besides chemical bonding and mechanical plowing: Shear slipping

IF 6.8 1区工程技术

Friction Pub Date : 2025-04-02 DOI: 10.26599/frict.2025.9441104

Yushan Chen, Liuyue Xu, Yuan Wu, Liao Zhou, Yuting Wei, Zihan Zheng, Hui Li, Liang Jiang, Linmao Qian

{"title":"A distinctive material removal mode in chemical mechanical polishing besides chemical bonding and mechanical plowing: Shear slipping","authors":"Yushan Chen, Liuyue Xu, Yuan Wu, Liao Zhou, Yuting Wei, Zihan Zheng, Hui Li, Liang Jiang, Linmao Qian","doi":"10.26599/frict.2025.9441104","DOIUrl":"https://doi.org/10.26599/frict.2025.9441104","url":null,"abstract":"Layered materials, such as bismuth, offer exceptional properties for future integrated circuits (IC). Research is underway to adapt these materials to conventional IC manufacturing processes, like chemical mechanical polishing (CMP). However, CMP of layered materials remains underexplored. This study chose bismuth as a representative to investigate its CMP properties. The results reveal that the material removal rate (MRR) increases rapidly and stabilizes as the H2O2 concentration increases. An ultra-high MRR exceeding 10 μm/min is achieved, which is significantly higher than the typical <1 μm/min. A distinctive material removal mode is proposed: shear slipping. This mode differs from the previously reported chemical bonding and mechanical plowing. Specifically, bismuth is oxidized by H2O2 to form a Bi2O3 surface film, which has a weak interaction with the bismuth substrate, creating a low-shear interface. Under the shearing action of the polishing pad asperities, the surface film slips relative to the substrate, distinct from forming and tearing chemical bonds via chemical bonding and breaking the weakened surface in-plane via mechanical plowing. Consequently, material removal is achieved as micron-sized debris. Furthermore, the shear slipping mode may apply to other layered materials. Adding lubricants and optimizing the polishing pad may help control layered materials removal in CMP.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"22 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758238","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

IPN-PUA: An ultra-low density self-lubricating composite with IPN structure–liquid lubricant coupling mechanism

IF 6.8 1区工程技术

Friction Pub Date : 2025-04-01 DOI: 10.26599/frict.2025.9440997

Weihua Cao, Xiao Yang, Haiwang Wang, Yu Dong, Changxin Liu, Bingli Fan, Xiaowen Qi

{"title":"IPN-PUA: An ultra-low density self-lubricating composite with IPN structure–liquid lubricant coupling mechanism","authors":"Weihua Cao, Xiao Yang, Haiwang Wang, Yu Dong, Changxin Liu, Bingli Fan, Xiaowen Qi","doi":"10.26599/frict.2025.9440997","DOIUrl":"https://doi.org/10.26599/frict.2025.9440997","url":null,"abstract":"The goal of net zero carbon emissions is of a great concern to energy conservation and emission reduction. In aerospace and other industrial fields, one of main energy consumption forms is friction between motion pairs, although the energy consumption caused by equipment mass cannot be ignored. Therefore, ultra-low density self-lubricating composites with an interpenetrating polymer network (IPN) structure–liquid lubricant coupling mechanism are designed and prepared in this work to meet the pressing requirements of energy saving and emission reduction. The liquid lubricant is locked in situ into polyurethane acrylate (PUA) with IPN structures (IPN-PUA structures). The thermodynamic, mechanical, and tribological properties, as well as the comprehensive density‒friction properties of the material with IPN-PUA structures were studied. After the liquid lubricant is locked into the IPN-PUA structure, the material possesses not only excellent self-lubricating properties but also good micro-mechanical properties, with a coefficient of friction (COF) of 0.0938, wear rate of 6.58×10−15 m3/(N·m) and nanoindentation modulus of 4.5 GPa. Compared with other polymeric materials, such composite materials also possess an ultra-low density of 1.107 g/cm3, which contributes to their excellent versatile self-lubrication and low-density characteristics.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"143 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745234","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

Advances in the contact mechanics theory and applications of biomimetic artificial adhesives inspired by biological multiscale hierarchical structures

IF 6.8 1区工程技术

Friction Pub Date : 2025-04-01 DOI: 10.26599/frict.2025.9441016

Qian Cheng, Feodor M. Borodich, Zaida Gao, Stanislav N. Gorb, Xiaoqing Jin

{"title":"Advances in the contact mechanics theory and applications of biomimetic artificial adhesives inspired by biological multiscale hierarchical structures","authors":"Qian Cheng, Feodor M. Borodich, Zaida Gao, Stanislav N. Gorb, Xiaoqing Jin","doi":"10.26599/frict.2025.9441016","DOIUrl":"https://doi.org/10.26599/frict.2025.9441016","url":null,"abstract":"Living organisms, such as geckos and insects, exhibit excellent climbing ability on various complex surfaces due to the hair-like hierarchical adhesive systems of their attachment devices. Over the past few decades, an increased understanding of the mechanisms of multiscale hierarchical adhesion systems and the continual improvement of theoretical modeling have promoted the rapid advancement in the design and application of biomimetic artificial adhesives. The modeling of biomimetic artificial adhesives has developed from simple structures to complex constructions with multilevel hierarchical properties. A review of advances in the development of these contact mechanics models is presented here. Adhesion and friction models considering multiscale hierarchical structural forms are discussed, with a focus on multiscale hierarchical models based on the development of the Cantor‒Borodich profiles. Finally, the most recent developments in studies of artificial setae with spatula-like ends, both axisymmetric and non-axisymmetric, are reviewed.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"75 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143758239","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

Comparative tribological and drainage performance of additively manufactured outsoles tread designs

IF 6.8 1区工程技术

Friction Pub Date : 2025-04-01 DOI: 10.26599/frict.2025.9441024

Shuo Xu, Shuvodeep De, Meysam Khaleghian, Anahita Emami

{"title":"Comparative tribological and drainage performance of additively manufactured outsoles tread designs","authors":"Shuo Xu, Shuvodeep De, Meysam Khaleghian, Anahita Emami","doi":"10.26599/frict.2025.9441024","DOIUrl":"https://doi.org/10.26599/frict.2025.9441024","url":null,"abstract":"This study investigates the effect of various tread designs to enhance grip on both dry and wet friction, aiming to reduce slip and fall accidents, especially in slip-prone workplaces and among the elderly. The research involves analyzing frictional performance and deformation characteristics through dry and wet friction testing. Computer-aided design (CAD) software was used to create digital models of various tread patterns, and two different additive manufacturing (AM) techniques, fused filament fabrication (FFF) and stereolithography (SLA) printing, were used for three-dimensional (3D) print block samples with tread patterns, and the materials used were thermoplastic rubber (TPR) filament and photocurable elastomeric resin. A specialized friction testing machine was used to measure the friction force of the treads on a glass surface under dry and wet conditions. A high-speed camera recorded the treads’ deformation and water drainage during testing. The results revealed the influence of tread pattern designs with two different rubber-like materials on friction and deformation, as well as performance on various contact surfaces.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"19 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745202","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

In vivo assessment of frictional pain from skin surface to brain activation

IF 6.8 1区工程技术

Friction Pub Date : 2025-03-31 DOI: 10.26599/frict.2025.9441105

Xingxing Fang, Wei Tang, Yangyang Xia, Shousheng Zhang

{"title":"In vivo assessment of frictional pain from skin surface to brain activation","authors":"Xingxing Fang, Wei Tang, Yangyang Xia, Shousheng Zhang","doi":"10.26599/frict.2025.9441105","DOIUrl":"https://doi.org/10.26599/frict.2025.9441105","url":null,"abstract":"Skin pain induced by friction is common in various skin-product interactions. In this study, interactions between residual limb skin and prosthetic sockets were taken into account to investigate the underlying mechanism of skin pain induced by interface friction. Subjective evaluation, in vivo tribological behaviors, and neurophysiological responses of the brain were studied systematically. The results demonstrated that frictional pain was subjected to a combination effect of friction coefficient and the mechanical characteristics of anatomic regions and contact materials. The impact of friction on skin pain should be assessed based on the selection of anatomic regions and contact materials. Stronger frictional stimulation can induce higher neural signals to be converted by nociceptors, leading to a higher potential of T-cell to be modulated and processed by the spinal dorsal horn. The main brain activation associated with frictional pain were found in the primary somatosensory cortex, secondary somatosensory cortex, and prefrontal cortex. The brain negative activation was evoked, and the activation area decreased during frictional pain. Compared with no pain stimulation, an increase in γ oscillations of EEG signals was observed in mild or moderate pain conditions. This study is helpful for understanding the mechanisms of frictional pain from the skin surface to brain response and to avoid further skin injury in various skin-product interactions as well as to provide theoretical guidance for the use of prosthetics.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"58 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143745201","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

Improvement in the planarization of 4H-SiC(0001) achieved by photo-assisted chemical mechanical polishing (P-CMP) using nano TiO2-based composite abrasive with heterostructure

IF 6.8 1区工程技术

Friction Pub Date : 2025-03-24 DOI: 10.26599/frict.2025.9440993

Shidong Chen, Hong Lei

{"title":"Improvement in the planarization of 4H-SiC(0001) achieved by photo-assisted chemical mechanical polishing (P-CMP) using nano TiO2-based composite abrasive with heterostructure","authors":"Shidong Chen, Hong Lei","doi":"10.26599/frict.2025.9440993","DOIUrl":"https://doi.org/10.26599/frict.2025.9440993","url":null,"abstract":"The planarization of silicon carbide (SiC), which is crucial for manufacturing power devices resilient to harsh working environments, has garnered significant attention. The utilization of titanium dioxide (TiO2)-based heterogeneous photocatalysts offers a promising avenue for achieving efficient polishing of SiC surfaces through photo-assisted chemical mechanical polishing (P-CMP) in an environmentally friendly manner. In this study, we employed nanodiamonds (NDs) and graphene oxide (GO) to fabricate a composite of TiO2/ND/GO abrasives. Subsequently, the P-CMP performance of TiO2/NDs/GO on the Si face of SiC was systematically investigated. High-resolution transmission electron microscopy (TEM) revealed the heterostructure between TiO2 and the NDs. Furthermore, the P-CMP results indicate that the heterostructure significantly enhances the polishing rate of the composite abrasives on SiC, achieving the highest material removal rate (MRR) of 600 nm/h and reducing the average surface roughness (Sa) to 1.1705 nm. Additionally, owing to the lubricating and dispersing effects of GO, the occurrence of ND aggregation is avoided, preventing scratching on SiC. The measurement of the ·OH concentration indicates that an increase in the ·OH concentration is the primary factor contributing to the improvement in the MRR. The results from wetting angle and friction coefficient tests revealed that the polishing slurry containing TiO2/NDs/GO exhibited excellent wettability and provided sufficient frictional force on the SiC surface. X-ray photoelectron spectroscopy (XPS) characterization demonstrated that TiO2/NDs/GO enhanced the degree of oxidation of the SiC surface, leading to the formation of a softer oxide layer. Finally, on the basis of the experimental and characterization results, a comprehensive analysis of TiO2/NDs/GO and P-CMP was conducted.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"59 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678027","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

An extension of Hertz’s formula for the stiffness of conformal spherical contacts

IF 6.8 1区工程技术

Friction Pub Date : 2025-03-24 DOI: 10.26599/frict.2025.944113

Alberto Betti, Paola Forte, Enrico Ciulli

引用次数: 0

From sparks to wear: Understanding arc erosion and tribological mechanisms in pantograph-catenary systems under irregular wire conditions

IF 6.8 1区工程技术

Friction Pub Date : 2025-03-24 DOI: 10.26599/frict.2025.9441102

Dehui Ji, Siyang Chen, Haihong Wu, Guoliang Wu, Minhao Zhu, Mingxue Shen

{"title":"From sparks to wear: Understanding arc erosion and tribological mechanisms in pantograph-catenary systems under irregular wire conditions","authors":"Dehui Ji, Siyang Chen, Haihong Wu, Guoliang Wu, Minhao Zhu, Mingxue Shen","doi":"10.26599/frict.2025.9441102","DOIUrl":"https://doi.org/10.26599/frict.2025.9441102","url":null,"abstract":"The pantograph-catenary system bears the crucial task of supplying electrical energy to high-speed trains. However, as train speeds continue to climb, irregularities in the contact wire exacerbate vibrations within the pantograph-catenary system, frequently triggering pantograph arcs. To delve deeper into the characteristics and erosion mechanisms of these arcs, this study employed high-speed cameras and photodiodes to precisely capture the evolution of arc morphology and fluctuations in arc intensity triggered by contact pair irregularities. By adjusting the current intensity, we further analyzed the impact of arc discharge on the friction and wear performance of carbon strips, as well as their current-carrying efficiency. The study found that when the current is sufficiently high, the arc column of the old arc, which forms when the contact pair separates, connects with the arc root of the new arc that is yet to make contact, leading to the formation of a continuous arc. Additionally, under the same current conditions, the arc intensity prior to contact between the tribo-pair is notably weaker than that at the moment of separation. Furthermore, parameters such as arc ignition rate, wear volume, and temperature all positively correlate with current intensity. Severe arc discharge not only deteriorates the electrical performance of the system, causing current distortion, but also exacerbates the instability of system operation. Abrupt changes in the friction coefficient can serve as a harbinger of intense arcs between the contact pair. Arc erosion causes severe damage to the current-carrying tribo-pairs, with ablation pits riddled with thermal cracks and pores, and leaving behind numerous molten copper particles, significantly increasing the wear volume. This study provides strong support for understanding the arc erosion process caused by contact wire irregularities and the mechanisms underlying abnormal wear of carbon strips.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"71 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143678026","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

Improving compatibility and tribological performance via supramolecular gelation of MoS2 nanoparticles in Perfluoropolyether lubricants

IF 6.8 1区工程技术

Friction Pub Date : 2025-03-22 DOI: 10.26599/frict.2025.9441094

Yanyan Bai, Xuzhi Hu, Ming Zhang, Qiangliang Yu, Yijing Liang, Yang Wu, Meirong Cai, Feng Zhou, Weimin Liu

{"title":"Improving compatibility and tribological performance via supramolecular gelation of MoS2 nanoparticles in Perfluoropolyether lubricants","authors":"Yanyan Bai, Xuzhi Hu, Ming Zhang, Qiangliang Yu, Yijing Liang, Yang Wu, Meirong Cai, Feng Zhou, Weimin Liu","doi":"10.26599/frict.2025.9441094","DOIUrl":"https://doi.org/10.26599/frict.2025.9441094","url":null,"abstract":"Perfluoropolyether (PFPE) oils pose challenges in their compatibility with nanoparticle lubrication additives due to their unique molecular structure, limiting their lubrication performance enhancement. To address this issue, we propose the development of nanoparticle composite supramolecular gel lubricants, aiming to maintain the dispersion stability of molybdenum disulfide (MoS2) nanoparticles within PFPE lubricants. It was achieved by harnessing the self-assembled three-dimensional network structure of supramolecular gels to entrap MoS2 nanoparticles. It was observed that MoS2 nanoparticles tended to cluster and settle in PFPE oils. However, the MoS2-composite PFPE supramolecular gel lubricant (gel@MoS2) exhibited exceptional dispersion stability over an extended period. MoS2 nanoparticles used as additives in PFPE-based supramolecular gel lubricants not only enhanced mechanical strength but also retained outstanding thixotropic properties. Additionally, nanoparticles improved extreme pressure performance, anti-friction capabilities and anti-wear properties of PFPE-based supramolecular gel lubricants under high loads of 300N. Furthermore, the lubrication mechanism of gel@MoS2 composites was elucidated using focused ion beam-transmission electron microscopy and X-ray photoelectron spectroscopy. During the friction process, the 3D networks of supramolecular gels, held together by weak interaction forces like H-bonds, halogen bonding, and van der Waals forces, were disrupted under continuous shear forces. Consequently, some of the MoS2 nanoparticles and gelators migrated to the steel surface, forming a protective lubricating film. This research holds significant importance in prolonging the lifespan of equipment in critical sectors such as aerospace and aviation, where high-end lubrication is essential.","PeriodicalId":12442,"journal":{"name":"Friction","volume":"56 1","pages":""},"PeriodicalIF":6.8,"publicationDate":"2025-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672809","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