Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Multidisciplinary
Michael Handwerker, Joerg Wellnitz, Hormoz Marzbani, Ulrich Tetzlaff
Summary: The study found that the annealing process can significantly improve the mechanical performance of continuous and chopped fibre reinforced polyamide 6 material in the build-up direction, including an increase in Young's modulus and ultimate tensile strength. Additionally, air voids within the parts were identified as the main cause of embrittlement.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Engineering, Mechanical
M. Hribersek, Simon Kulovec
Summary: When designing gear systems, selecting appropriate materials is crucial. This paper analyzes and discusses the wear behavior of glass fiber reinforced POMPA66 and POM-PA66 gear pairs under different load conditions and finds that POM gears have a higher wear rate compared to PA66 gears. It is observed that POM/PA66 GF30 TF15 Si has a longer lifetime under higher loads. The authors conclude that lower wear and deformation of gear teeth have a decisive influence on good durability performance of gears.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Anis Adilah Abu Talib, Aidah Jumahat, Mohammad Jawaid, Napisah Sapiai, Alcides Lopes Leao
Summary: Basalt fibre reinforced polymer (BFRP) composite shows better wear resistance and friction properties compared to Glass fibre reinforced polymer (GFRP) composite under different test conditions. Different wear mechanisms are observed in scanning electron microscopy examination for each test conducted.
Article
Engineering, Chemical
Dajana Japic, Simon Kulovec, Mitjan Kalin, Janez Slapnik, Blaz Nardin, Behnam Ghalei, Miroslav Huskic
Summary: The quality of plastic gears, especially their durability, has become increasingly important due to advancements in electric mobility. New materials with better mechanical properties, high thermal conductivity, and tribological properties are being developed. The study investigates the effect of expanded graphite (EG) particle size on the properties of composites with glass fibre-reinforced polyamide 6 (PA6/GF). It is found that using EG with smaller particle size (EG5) results in better performance.
ADVANCES IN POLYMER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Ashley Blythe, Bronwyn Fox, Mostafa Nikzad, Boris Eisenbart, Boon Xian Chai, Patrick Blanchard, Jeffrey Dahl
Summary: This study introduces a novel stacking sequence by interlayering a nanofiber veil at the interface of a hybrid carbon/ E-glass fibers composite, resulting in a change in failure mechanism and an improvement in pseudo-ductile response.
Article
Materials Science, Composites
El Hadi Saidane, Gilles Arnold, Pascal Louis, Marie-Jose Pac
Summary: This study characterizes the mechanical behavior of 3D-printed continuous glass fiber-reinforced polyamide composites. The results show a significant influence of fiber volume content and orientation, highlighting the importance of choosing an optimized stacking sequence prior to printing for desired mechanical properties. This emphasizes the need for careful consideration of fiber content and orientation in composite 3D printing processes.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2022)
Article
Polymer Science
Jingdong Ma, Guoyan Yu, Xianmin Wang, Jun Li, Jingquan Wu, Xianzhang Wang
Summary: In this study, the tribological behavior of polymeric matrix composites with different particle reinforcements under seawater-lubricated conditions was investigated. The addition of nano- and micron-sized SiC particles and nano-sized SiO2 particles was found to affect the seawater absorption, hardness, contact angle and tribology performance. The study also analyzed the wear mechanisms and suggested that the addition of different particle reinforcements has varying effects on the friction coefficient and wear loss under seawater conditions. This research provides valuable insights for the further application and development of polymeric matrix composites in marine engineering equipment.
Article
Chemistry, Physical
Fan Guo, Saad Al-Saadi, R. K. Singh Raman, Xiaoling Zhao
Summary: The effect of exposure to a dual environment of seawater sea sand concrete on the durability of fibre reinforced plastic confining tubes has been studied. Carbon-fibre-reinforced polymer surfaces remained unchanged, while basalt-fibre-reinforced polymer and glass-fibre-reinforced polymer tubes degraded. The investigation also included a specialized examination of the degradation at the fiber-matrix interface.
Article
Materials Science, Composites
Ziyan Man, Boyang Wan, Hongjian Wang, Qing Li, Li Chang
Summary: In this study, scratch tests were conducted to investigate the surface deformation behavior of additively manufactured continuous carbon fiber reinforced polyamide 6 composites. The effect of fiber orientation on scratch deformation modes was examined, with different scratch directions considered. It was found that fiber orientation greatly influenced the critical loads for the transitions between deformation modes, with samples having fibers in the normal direction more prone to fiber breakage and removal. A finite element model was also established to analyze the stresses generated on fibers in the contact region, with a focus on interfacial bonding and fiber distribution. The research contributes to a deeper understanding of the scratch and tribological performance of carbon fiber reinforced polymers, providing guidelines for the design and selection of such materials using additive manufacturing technology.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Construction & Building Technology
Zhe Xiong, Yue Su, Ziqian Hu, Yubiao Huang, Zhimin Wang, Junyu Chen, Weijian Lao, Lijuan Li, Keting Zhou, Jiachang Kuang
Summary: This study investigates the enhancement of dynamic compression performance of seawater sea sand concrete (SSSC) using alkali-resistant glass fiber (GF) and expansion agent (EA). The results demonstrate the significant strain rate effect of GF and EA on the dynamic compression performance of SSSC, which is further supported by the analysis of failure mode.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Environmental
Xuechen Zhou, Le Shi, Rachel F. Taylor, Chenghan Xie, Bin Bian, Cristian Picioreanu, Bruce E. Logan
Summary: Low-cost polyamide thin-film composite (TFC) membranes are being explored as alternatives to cation exchange membranes for seawater electrolysis. This study suggests that TFC membranes with thinner but mechanically strong supporting layers and size-selective active layers should reduce energy consumption and the potential for chlorine generation for seawater electrolyzers.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Polymer Science
Pyoung-Chan Lee, Su Young Kim, Youn Ki Ko, Jin Uk Ha, Sun Kyoung Jeoung, Donghyeok Shin, Jung Hoon Kim, Myeong-Gi Kim
Summary: This study aims to improve the frictional properties of PA46 by adding graphene. The nanocomposites prepared through self-adsorption showed lower coefficient of friction and superior mechanical properties compared to those prepared by direct compounding. This can be attributed to the uniform dispersion of graphene and the strong attractive force between the PA46 matrix and graphene.
Article
Engineering, Multidisciplinary
James J. Murray, Ankur Bajpai, James Quinn, Jake McClements, Klaus Gleich, Edward D. McCarthy, Conchur M. O. Bradiagh
Summary: This study investigates the fibre-matrix interfacial properties of glass-fibre/polyamide-6 composites produced by thermoplastic resin transfer moulding. The results show that the use of a novel reactive fibre sizing improves the adhesion between fibres and matrix, as well as the fracture toughness of the composites.
COMPOSITES PART B-ENGINEERING
(2022)
Article
Engineering, Mechanical
A. Panerai, A. Canegrati, L. M. Martulli, M. Kostovic, G. Rollo, A. Sorrentino, M. Carboni, A. Bernasconi
Summary: Additive manufacturing of Short Fibre Reinforced Polymers (SFRPs) combines good mechanical properties with high design flexibility. Fatigue tests were performed on SFRP specimens with different raster orientations. The results showed thermal and mechanical fatigue regimes. The fatigue behavior of this material was found to be dominated by the polyamide matrix.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Justine Decrozant-Triquenaux, Leonardo Pelcastre, Braham Prakash, Jens Hardell
Summary: This study focuses on the friction and wear behavior of aluminum alloys at high temperatures, showing that the formation of tribolayers can affect friction behavior, while adhesion-induced material transfer can impact tool life and product quality.
Article
Engineering, Mechanical
Pouria Valizadeh Moghaddam, Braham Prakash, Esa Vuorinen, Mikael Fallqvist, Jon M. Andersson, Jens Hardell
Summary: The reciprocating sliding wear tests were conducted on TiAlN coating against 316L stainless steel and carbide-free bainitic steel at temperatures of 40, 400 and 800 degrees C. The results showed that material transfer was more significant for the softer stainless steel at lower temperatures, while carbide-free bainite exhibited more material transfer at 800 degrees C. Friction coefficient increased for stainless steel with increasing temperature, but decreased for carbide-free bainite at elevated temperatures due to the formation of an easily sheared iron oxide layer. Additionally, the generation of a thin tribofilm containing aluminium oxide and oxidised transferred material could protect the TiAlN coating against wear at 800 degrees C in the case of stainless steel.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Justine Decrozant-Triquenaux, Leonardo Pelcastre, Cedric Courbon, Braham Prakash, Jens Hardell
Summary: This study aims to characterize the high temperature tribological behavior of selected PVD coatings and lubricants in sliding against aluminum alloy. The results showed that DLC and CrN coatings combined with the polymer lubricant were the most effective in reducing aluminum transfer.
Article
Engineering, Mechanical
A. Vikhareva, G. Macedo, L. Pelcastre, J. Hardell
Summary: The study compared the high temperature friction and wear behavior of AM produced maraging steel and conventional hot-work tool steel, revealing that the maraging steel exhibited higher friction instability and increased severity of wear at 700 degrees Celsius. The milled and ground surfaces displayed similar wear mechanisms, while the shot blasted surface showed less material build-up but more deformation and entrapment of particles in the near surface region.
Article
Engineering, Mechanical
Leonardo Pelcastre, Evan Kurnia, Jens Hardell, Justine Decrozant-Triquenaux, Braham Prakash
Summary: The use of hardfacing materials in press hardening tools can enhance durability and improve process economy, by depositing new material on the tool through welding. The friction stability of hardfacing materials is closely related to the temperature of the workpiece material, affecting the formation and structure of material transfer layers onto tool steels.
Article
Engineering, Manufacturing
J. Domitner, Z. Silvayeh, A. Shafiee Sabet, K. I. Oksuz, L. Pelcastre, J. Hardell
Summary: This study investigated the coefficient of friction between tool steel and aluminum alloys using a strip drawing tribometer, finding that the COF increases with sliding distance. It was also observed that using moist pin surfaces can increase the COF, as the initially dry lubricant becomes sticky, promoting the entrapment of abraded aluminum particles.
JOURNAL OF MANUFACTURING PROCESSES
(2021)
Article
Engineering, Mechanical
Juan Guillermo Zapata Tamayo, Marcus Bjorling, Yijun Shi, Braham Prakash, Roland Larsson
Summary: The study demonstrated that lubricating steel-steel contacts with Glycerol-water-glycol lubricant reduced mild wear and promoted micro-pitting as the main failure mode at low sliding levels compared to a commercial fully formulated gear oil. It was also observed that friction was significantly lower for the Glycerol-water and Glycerol-water-glycol lubricants, mainly due to a low pressure-viscosity coefficient.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Mechanical
Hector Torres, Tugce Caykara, Jens Hardell, Janne Nurminen, Braham Prakash, Manel Rodriguez Ripoll
Summary: Iron-based coatings with solid lubricants prepared by laser cladding can control friction and reduce tool wear during high-temperature metal forming. The addition of lubricious compounds helps to lower friction and wear, while microstructural and phase composition studies have been conducted on the coatings at high temperatures.
Article
Engineering, Mechanical
Maria Rodiouchkina, Henrik Lindsjo, Kim Berglund, Jens Hardell
Summary: The effect of stroke length on the tribological performance of polymer composites used for bearings in hydropower turbines was investigated. Results showed that increased stroke length led to higher wear rates, and different friction behaviors were observed for thermoset and thermoplastic materials. Surface analysis revealed more severe wear of the stainless-steel counter surface at longer stroke lengths.
Article
Engineering, Mechanical
Gabriel Macedo, Leonardo Pelcastre, Jens Hardell
Summary: In recent years, the use of additive manufacturing (AM) to produce forming tools for hot stamping has gained increased interest due to the ability to tailor the die material and produce complex geometries. However, there is a lack of knowledge regarding the tribological behavior of AM materials, particularly at high temperature, as well as the influence of surface finishing processes. This study investigated the high temperature friction and wear behavior of a tool steel produced by selective laser melting, compared to conventionally produced steel, and found that the different surface finishes of the AM samples had varying effects on wear mechanisms and material transfer. The results showed similar friction and wear behavior between the AM and reference ground tool steel.
Article
Engineering, Mechanical
Maria Rodiouchkina, Kim Berglund, Fredrik Forsberg, Ilia Rodushkin, Jens Hardell
Summary: This study investigates the influence of stainless-steel counter surface roughness and lay on the tribological behavior of self-lubricating polymer composite bearings used in Kaplan turbines. The results show that overly smooth surfaces result in higher friction and wear of the counter surface, while rougher surfaces have a negative effect on the wear of the polymers.
Article
Engineering, Mechanical
Kim Berglund, Maria Rodiouchkina, Jens Hardell, Kalle Kalliorinne, Jens Johansson
Summary: The study aims to develop a novel reciprocating tribometer and test method that enables friction and wear tests under low-speed reciprocatory sliding with high contact pressures, and to evaluate the friction and wear performance of self-lubricating bearings for specific operating conditions found in Kaplan turbines.
Article
Engineering, Mechanical
Busra Duran, Jerome Cavoret, David Philippon, Fabrice Ville, Arnaud Ruellan, Frank Berens
Summary: This study analyzes the changes in the physicochemical properties and tribological performances of gear transmission oils during field operation, finding differences from traditional engine oils.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Baocheng Liu, Hongsheng Chen, Jun Zhou, Jing Wang, Wenxian Wang, Xiaochun Chen, Sanxiao Xi
Summary: This study used fast hot pressing sintering to fabricate WC/AlCoCrFeNi2.1 metal matrix composites (MMCs). It was found that the addition of reinforced particles increased the microhardness, nanoindentation and wear resistance of the MMCs. During frictional processes, an oxide film formed, providing material protection, enhancing stability and reducing friction-induced losses.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Pradip Kumar Verma, Alok Singh
Summary: This study investigates the mechanical properties and wear resistance of CoMoMnNiV high entropy alloy reinforced aluminium matrix composite processed through stir-squeeze casting assisted with an ultrasonic transducer. The results show significant improvements in mechanical properties and wear resistance, with the composite containing 8 wt% HEA demonstrating the highest resistance to wear. Optical microscopy, SEM, and an optical profilometer were used for a thorough examination of the microstructure and worn surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Zhenghai Yang, Yingjian Song, Jinlong Jiao, Wenbo Li, Bao Shangguan, Yongzhen Zhang
Summary: This study investigated the friction, wear properties, and current-carrying properties of copper-graphite composites paired with brass C28000. The results showed that the current-carrying properties of the composite materials were excellent, but their wear rate was the main limiting factor. Furthermore, an increase in the thickness of the graphite layer led to an improvement in the uniformity of damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Moustafa Mahmoud Yousry Zaghloul, Karen Steel, Martin Veidt, Michael T. Heitzmann
Summary: This research evaluates and compares the impact of different material types on the tribological characteristics of Polyamide 6 composites, and finds that glass fiber-reinforced Polyamide 6 exhibits better friction and wear performance under high-pressure velocity factors.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Shaoqing Qin, Lida Zhu
Summary: In this paper, the surface and subsurface damage of laser assisted grinding CrCoNi medium entropy alloys were investigated using molecular dynamics simulations. The results showed that the application of laser energy can reduce cutting forces and minimize subsurface damage.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Kaikui Zheng, Youxi Lin, Tingzheng Lai, Chenghui Gao, Ming Liu, Zhiying Ren
Summary: The study investigated the use of waste foundry resin-bonded sand as a substitute for copper in resin-based brake material. It found that the waste sand was more favorable for improving the overall friction and wear properties of the material compared to copper. Waste sand benefited the material by forming a friction layer, leading to increased friction coefficient and stability. Brake material with 10-15% waste sand showed excellent heat-fade resistance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Dayang Li, Fanhao Zhou, Yutong Gao, Kun Yang, Huimin Gao
Summary: This article introduces a continuous prediction model based on deep learning for predicting the power output of steam turbines. The model uses long short term memory (LSTM) method to develop a trend prediction model and optimizes the prediction model through feature selection method. Experimental results show that the model outperforms other models in terms of prediction performance.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Tomohiro Toyoda, Ryo Yasuike, Toshihiro Noda
Summary: In this study, a elasto-plastic constitutive model of friction incorporating the concept of superloading surface was developed based on the subloading friction model. The proposed model achieves a smooth transition of friction by describing the evolution rule of structure, treating the state with static friction coefficient larger than kinetic friction coefficient as the bulkiness of structure. The positive definiteness of the plastic multiplier, loading condition, and material parameters were derived, and the validity of the proposed model in accordance with the subloading-friction model was confirmed through a stick-slip simulation of a mass-spring system.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
P. Balaji, B. Surya Rajan, K. Sathickbasha, P. Baskara Sethupathi, Deviga Magadevan
Summary: This study emphasizes the importance of using a variety of solid lubricants with different oxidation temperature regimes to enhance the tribological performance of brake pads.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Jian Ma, Yancong Liu, Javad Mostaghimi, Na Zhang
Summary: This paper investigates the influence of preparation strategies on the lubrication properties of surface textures. Three laser scanning strategies are proposed to achieve a sinusoidal textured surface, and the evolution of surface structure and chemical composition is discussed. The findings show that ridge structures enhance anti-wear properties but also increase the friction coefficient. However, the oil cover preparation method prevents the formation of ridges and improves wettability.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Mohammad Roostaei, Arvin Taghizadeh Tabrizi, Hossein Aghajani
Summary: In this research, the Al2O3/MoS2 nanocomposite coating layer was successfully applied on the surface of Ti-6Al-4 V alloy. The relation between the surface characteristics and wear resistance of the coating was studied using atomic force microscopy analysis and pin-on-disk wear test method. The results showed that the nanocomposite coating significantly reduced the wear rate and provided an equation to calculate the Lancaster coefficient.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Musa Bilgin, Sener Karabulut, Halil Karakoc, Yunus Kayir, Murat Sarikaya
Summary: This study investigates various methods to improve the machinability efficiency of Inconel 718 alloy while considering their effect on microstructural properties. The results show that hot+PMQL, hot+SiCNMQL, and hot+Al2O3-NMQL contribute significantly to the improvement of machinability characteristics. The EBSD analysis also reveals that a limited area is affected by heat in the hot machining environment and that the removal of the heated layer during milling process helps preserve the microstructure.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Q. Gao, Y. Fan, Y. G. Wu, J. L. Liu, J. Wang, L. Li
Summary: Fretting wear significantly affects the hysteresis behavior of the contact surface and leads to joint degradation. This study investigates the influence of harmonic normal force on the evolution of interface morphology and contact parameters with fretting wear. The results show that the harmonic normal force can significantly influence the hysteresis loop and the energy dissipation distribution on the contact surface.
TRIBOLOGY INTERNATIONAL
(2024)
Article
Engineering, Mechanical
Benjamin Weiland, Floriane Leclinche, Anis Kaci, Brigitte Camillieri, Betty Lemaire-Semail, Marie -Ange Bueno
Summary: This study presents a systematic approach to generating control signals for a tactile simulator that simulate the touch of textile fabrics. By using a friction modulation tactile surface and acquiring forces from real surfaces with artificial finger mimicking fingerprints, control signals are generated and processed in the frequency domain before sending them to the tactile stimulator. The study focuses on the potential benefits of incorporating fingerprint information in fabric simulations to achieve a more realistic tactile perception. A sensory analysis with 36 participants using the generated control signals showed better discrimination without fingerprint information.
TRIBOLOGY INTERNATIONAL
(2024)
