Article
Chemistry, Applied
Ben Liu, Hongchao Zhao, Xiangfen Li, Zonghe Yang, Dongqing Zhang, Zhanjun Liu
Summary: This study investigates the relationship between pore structure and comprehensive properties of high density graphite prepared using different molding methods. The results reveal that the properties of graphite are significantly influenced by porosity, pore size distribution, specific surface area, pore shape, and fractal dimension. Among the three graphite materials with different pore structures, hot molding graphite exhibits the best comprehensive properties. Additionally, a positive correlation is found between the fractal dimension and the friction and wear properties of graphite materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Engineering, Mechanical
Javier M. Julia, Luis Rodriguez-Tembleque
Summary: This work presents a computational framework to study the evolution of subsurface stresses in 3D solids under orthotropic frictional contact and wear conditions. The proposed methodology is validated and the importance of considering wear conditions, friction coefficient values, and sliding direction in influencing subsurface stress distribution is highlighted through numerical examples.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Chemistry, Multidisciplinary
Nitant Gupta, John M. Alred, Evgeni S. Penev, Boris Yakobson
Summary: The study found a linear relationship between the strength of carbon nanotube bundles and two essential control parameters. Geometrical perturbations caused by length distribution and bundle dimensions result in a net stress concentration effect, but do not influence scaling behavior.
Article
Materials Science, Characterization & Testing
Hikaru Okubo, Daiki Kagiwata, Shinya Sasaki, Yoshinobu Tsujii, Ken Nakano
Summary: This study conducted an operando tribo-Raman spectroscopic experiment to reveal the wear mechanisms of concentrated polymer brushes (CPBs) in good solvents, and found that controlling the wetting degree of CPBs is crucial for their superlow friction phenomena.
Review
Polymer Science
Mohammed Abdul Samad
Summary: Polymer coatings have gained attention due to their low cost, ease of coating, low friction, and good anti-corrosion properties. Among various polymers, UHMWPE stands out for its excellent tribological properties, despite limitations such as low load-bearing capacity and low thermal stability. Researchers have developed various routes, including composite coatings, film systems, and dual film systems, to improve the tribological performance of UHMWPE coatings.
Article
Engineering, Electrical & Electronic
Mohammad Nankali, Norouz Mohammad Nouri, Nima Geran Malek, Morteza Amjadi
Summary: This study presents a temperature-dependent 3D percolation model for predicting the sensory response of stretchable strain sensors in complex environmental conditions. Experimental results validate the model's effectiveness for assessing the dynamic response characteristics of strain sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Mechanical
Meenu Pandey, Divya Verma, Viswanath Balakrishnan, Nitya Nand Gosvami, J. P. Singh
Summary: The research revealed that patterned silver surfaces exhibit anisotropic friction behavior, with significant differences in coefficient of friction values when sliding in different directions on one-arm and two-arm nanocolumnar structures under varying normal load.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Seonghoon Kim, Taewoo Kim, Eunpyo Hong, Ilguk Jo, Jaeyoung Kim, Heesoo Lee
Summary: The study investigated carbon-doped TiZrN nanocomposite coatings formed by laser carburization, showing that the increase in laser thermal energy led to higher ratios of TiC and ZrC carbides, along with the formation of amorphous carbon. The wear resistance of the coatings improved due to the formation of hybrid bonds and amorphous carbon, with a significant decrease in friction coefficient and wear rate.
Article
Materials Science, Multidisciplinary
Yifan Dai, Zefei Tan, Wengang Chen, Dongyang Li, Jubang Zhang, Zexiao Wang, Yukun Mao, Yuhao Wang, Wenxuan Guo
Summary: Laser processing technology was used to prepare triangular textures with different area occupancies on the surface of 4Cr10Si2Mo valve steel, and then the steel was subjected to salt bath nitridation and oxidation. The effects of triangular texture on surface stress, hydrodynamic pressure, and friction were explored using simulation technology. The results showed that the wear resistance of the steel significantly improved after the composite texture treatment.
Article
Engineering, Chemical
Olivier Lacroix, Hicham Chaouki, Julien Lauzon-Gauthier, Houshang Alamdari, Mario Fafard
Summary: The aim of this study was to investigate the effect of temperature on the compaction and friction behavior of green anode paste during the anode forming process. Experimental tests were conducted at temperatures ranging from 130 degrees C to 170 degrees C. The results showed that temperature significantly influenced the nonlinear behavior of the anode paste. Friction tests also revealed the static and kinetic friction coefficients between the paste and steel at different interface temperatures. These findings provide new insights and pave the way for developing a temperature-dependent material model for anode paste compaction.
Article
Engineering, Civil
Ying Qin, Ke-Xue Zhao, Gan-Ping Shu, Lu Ke
Summary: Friction dampers were widely used in beam-column connections to dissipate earthquake energy and reduce building damage. This study focused on the influence of different materials, surface cleaning process, bolt pretension, and loading protocols on the coefficient of friction. The test results showed that shot blasting process significantly improved the friction coefficient and energy dissipation ability. Friction dampers with selected materials provided high initial stiffness for structures, and the coefficient of friction was influenced by bolt pretension and loading protocols. Mathematical models were proposed to predict the friction coefficient variation, which showed good agreement with the test data.
Article
Engineering, Mechanical
Feng Du, Peng Ke, Ping Hong
Summary: This study presents a theoretical framework and a simplified analytical solution to unveil the friction mechanism when a curved skate sliding on ice. The theory is validated by experiments and the effects of various factors on the friction are revealed in detail. The study finds that the contribution of friction force from the ploughing deformation and the fluid friction are comparable, clarifying how the ploughing deformation and frictional melting regulate the friction during skating.
Article
Nanoscience & Nanotechnology
Divya Verma, Himanshu Rai, Nitya Nand Gosvami, Viswanath Balakrishnan
Summary: This work investigates the role of alumina coating on the frictional behavior of vertically aligned carbon nanotube forests sliding against alumina microspheres. The alumina coating significantly reduces the coefficient of friction by changing the contact area and lateral stiffness.
ACS APPLIED NANO MATERIALS
(2022)
Article
Agricultural Engineering
Samuel Gemsprim Muthurathinam, Ashoka Varthanan Perumal
Summary: The lubricating ability of vegetable oil-based lubricant additives with commercially used engine lubricant is studied in this article. The biolubricant blends, such as N10, P10, P20, and N20, are capable of significantly reducing wear and have appreciable frictional coefficients. These blends can be considered as primary alternatives to conventional lubricants in the long term.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Mechanical
Kaiwen Guo, Tinglian Zhang, Huang Yuan
Summary: The traditional linear model for threaded fastener design is found to over-estimate axial force in the presence of plasticity, leading to the proposal of a new friction model based on frictional dissipation energy. Experimental validation shows good consistency between the proposed model and actual results, providing a more accurate prediction for plastic fastening processes.
TRIBOLOGY INTERNATIONAL
(2021)
