Article
Engineering, Mechanical
He Li, Junkai Niu
Summary: This paper investigates the impact of texture on the tribological performance of journal bearings operating under starvation lubrication conditions. The P-theta model with mass conservation boundary conditions accurately predicts the oil film distribution in the full oil film/starvation region of the textured bearing. The study discusses the effects of different levels of starvation lubrication on parameters such as eccentricity, attitude angle, full film area, and friction coefficient in textured bearings. The results show that the severity of the texture's effect on bearing performance varies with starvation levels and that texturing can improve the bearing's operating performance, increase load carrying capacity, reduce friction coefficient, and enhance safety.
SURFACE TOPOGRAPHY-METROLOGY AND PROPERTIES
(2023)
Article
Engineering, Mechanical
Yazhou Mao, Lilin Li, Daqing Li, Jingyang Zheng
Summary: This paper investigates the turbulent lubrication performance of a textured hydrodynamic journal bearing (THJB) and analyzes the effects of structural and working parameters on the bearing performance. The results show that turbulent lubrication is suitable for actual operating conditions, but the system tends to be unstable as the eccentricity ratio and rotational speed increase.
Review
Green & Sustainable Science & Technology
Z. Rasep, M. N. A. W. Muhammad Yazid, S. Samion
Summary: Vegetable oils are seen as potential bio lubricants that could replace traditional mineral oils in the future, offering unique environmental benefits. Surface modification of journal bearings has gained attention for its ability to enhance performance. The combination of textured journal bearings and vegetable oil shows promise for various industrial applications.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Mechanics
Peng Li, Hao Zhang, Xin Li, Zhanqun Shi, Sen Xiao, Fengshou Gu
Summary: The paper investigates the effect of manufacturing errors and misalignment on the lubrication behavior of journal bearings with micro-groove under dynamic loads. A mixed lubrication model is developed, considering factors such as mass conservation cavitation algorithm, asperity contact model, and force balance equation. The performance parameters of bearings with different surface profiles and micro-groove distributions are analyzed, and the results show that manufacturing errors and misalignment have a significant impact on the transient behavior of journal bearings.
Article
Engineering, Mechanical
Zhongliang Xie, Yun Zhang, Jinzhu Zhou, Weidong Zhu
Summary: This paper aims to reveal the micro interface lubrication regimes of water lubricated bearings through computational fluid dynamic analysis. The influences of operating conditions and dimensionless structural parameters on fluid features are explored, and experimental data verifies the correctness of the lubrication model. The research results lay a solid foundation for further optimal design of such bearings.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Mechanical
Jian Jin, Xiaochao Chen, Yiyang Fu, Yinhui Chang
Summary: This study explores the combined effects of boundary slip and texture on hydrodynamic journal bearings. The optimized patterns of slip and texture can substantially improve the performance of journal bearings. The location and size of the slip and texture zones have a significant impact on journal bearings, with different texture-slip combinations affecting load-carrying capacity and friction reduction.
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2021)
Article
Energy & Fuels
Tao Nie, Kun Yang, Lei Zhou, Xin Wu, Yin Wang
Summary: This study investigates the application of surface texture technology in reducing friction in journal bearings of internal combustion engines. Through simulation models and experimental validation, it examines the effect of texture shape and position on the load capacity of the bearings.
Article
Acoustics
Lubos Smolik, Jan Rendl, Milan Omasta, Miroslav Byrtus, Petr Sperka, Pavel Polach, Martin Hartl, Michal Hajzman
Summary: This paper investigates the effects of mechanically induced textures on the stability of journal bearings, focusing on lightly loaded bearings commonly used in vertical rotors and microturbines. The results show that textures near the minimum oil film thickness can improve stability at low loads, but have little effect at a specific load of 0.15 MPa. The paper also discusses computational methods for dealing with cavitation and highlights the sensitivity of numerical results to the density of computational mesh.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Mechanical
Edoardo Gheller, Steven Chatterton, Daniele Panara, Gabriele Turini, Paolo Pennacchi
Summary: This paper applies artificial intelligence (AI) to predict the behavior of tilting pad journal bearings (TPJBs) using a trained deep learning (DL) model, which can quickly and accurately predict the dynamic and static characteristics of TPJBs compared to traditional models.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Multidisciplinary
Vivek Bhardwaj
Summary: This study reports the improvement in performance behaviors of non-Newtonian fluid lubricated journal bearings by employing a rectangular pocket. The investigation found that the pocketed bearing yields significantly reduced coefficient of friction and higher load carrying capacity compared to the non-pocketed bearing. Additionally, the performance of the pocketed bearing improves with the increase in the power law index.
ENGINEERING RESEARCH EXPRESS
(2021)
Article
Engineering, Mechanical
Luis Fernando dos Anjos, Alfredo Palma Jaramillo, Gustavo Carlos Buscaglia, Rodrigo Nicoletti
Summary: The manufacturing of texture patterns on the surfaces of lubricated bearings is an interesting way to improve their tribological behavior. Depending on the texture geometry, it can reduce friction or increase load-carrying capacity. This study investigates the effects of texturing the rotating surface of journal bearings' lubricated contact.
TRIBOLOGY INTERNATIONAL
(2023)
Review
Engineering, Mechanical
Sitae Kim, Dongil Shin, Alan B. Palazzolo
Summary: This review summarizes the effects of nonlinear elements in fluid film journal bearings on rotor-bearing systems, including sub- and super-synchronous, chaos and thermally induced instability responses. It also discusses the importance of nonlinear, thermo-elasto-hydrodynamic aspects of journal bearings in high-performance turbomachines, and presents nonlinear solution methodologies and numerical tools for analyzing nonlinear vibration responses induced by bearings.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Ocean
Wenbo Tu, Qiyuan Deng, Pengfei Zhang, Hua-Peng Chen, Zonghui Liu
Summary: Based on the nonlinear Winkler theory, a simplified method for evaluating the lateral bearing capacity of the caisson-pile foundation (CCPF) considering the effect of scour-hole dimensions was proposed. The results from a model test verified the reliability of this method. The influence degree of each individual factor on the ultimate lateral bearing capacity of the foundation was discussed, with emphasis on the effects of scour depth, scour width, and scour slope angle. The results show that the decrease of the ultimate lateral bearing capacity becomes stable as the slope angle decreases or the scour width increases. Additionally, the effects of scour width and scour slope angle on the bearing capacity of the foundation show a similar trend when the scour depth varies differently. Ultimately, these findings can provide a technical guide for CCPF design.
MARINE GEORESOURCES & GEOTECHNOLOGY
(2022)
Article
Engineering, Mechanical
Sanjay Sharma, Aniket Sharma, Gourav Jamwal, Rajeev Kumar Awasthi
Summary: This comparative numerical study analyzed the performance of V-shape protruded, dimple textured, and untextured bearings, finding that the load-carrying capacity and coefficient of friction are maximized for the protruded textured bearing under certain conditions.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2021)
Review
Engineering, Mechanical
Quentin Allen, Bart Raeymaekers
Summary: Total hip replacement surgeries are common in the United States to treat degenerative joint diseases, but the limited longevity of implants remains a significant issue. Innovations in materials and coatings have helped reduce wear, but there is still a need to improve longevity through texture features and manufacturing techniques.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2021)
Article
Mechanics
Pei Li, Y. B. Guo, V. P. W. Shim
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2018)
Article
Engineering, Mechanical
Li Pei, Y. B. Guo, M. W. Zhou, V. P. W. Shim
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2019)
Correction
Engineering, Mechanical
Pei Li, Y. B. Guo, M. W. Zhou, V. P. W. Shim
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2019)
Article
Engineering, Mechanical
Pei Li, Y. B. Guo, V. P. W. Shim
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2020)
Article
Mechanics
Pei Li, Y. B. Guo, V. P. W. Shim
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2020)
Article
Engineering, Mechanical
Kai Liu, Pei Li, Zhonggang Wang
Summary: This study proposed a method for generating a random hail spatial field based on the Monte Carlo algorithm, incorporating randomness into hailstone parameters. The simulation successfully captured the random response of hail impact on a rigid target, demonstrating the reliability and effectiveness of the modeling approach.
EXTREME MECHANICS LETTERS
(2021)
Article
Engineering, Multidisciplinary
Junhao Xu, Pei Li, Leong Hien Poh, Yingying Zhang, Vincent Beng Chye Tan
Summary: The FE2 method translates macro kinematic constraints to micro RVEs and extracts their responses in a consistent manner. The Direct FE2 method simplifies the conventional FE2 approach and reduces computational costs. This study applies the Direct FE2 method to thin plate structures and validates its performance through comparisons with direct numerical simulations.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2022)
Article
Mechanics
Wenjun Chen, Vincent Beng Chye Tan, Xiangguo Zeng, Pei Li
Summary: A dual-scale discrete fracture calculation method is proposed to study the discrete crack growth of heterogeneous materials. By embedding a representative volume element (RVE) with a cohesive zone into the Gauss points of the macro-element, the full finite element model of the discrete crack is replaced, improving both the dual-scale modeling and reducing computational cost. The method is shown to be compatible with commercial software. The fracture process of a two-phase heterogeneous material is studied using this method, and the resulting macro-fracture direction is consistent with experimental observations.
ENGINEERING FRACTURE MECHANICS
(2022)
Article
Engineering, Mechanical
Kai Liu, Pei Li, Zhonggang Wang
Summary: This study proposes a new criterion for the mechanical behavior of hail ice, which accurately predicts the peak force and failure patterns during impact using a linear combination of rate-dependent stress and pressure.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2022)
Article
Engineering, Mechanical
Kai Liu, Pei Li, Zhonggang Wang
Summary: This paper proposes a buckling-regulated origami material by synergy design, which incorporates three buckling-regulated mechanisms to control global buckling, local buckling, and high energy-absorbing deformation. The manufactured origami materials show anticipated properties, and it may inspire new innovations in designing other multi-functional metamaterials.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Mathematics
Ang Zhao, Vincent Beng Chye Tan, Pei Li, Kui Liu, Zhendong Hu
Summary: This paper proposes a filtering-based reconstruction method to solve the checkerboard problem and provides an important solution for the practical application of multiscale topology optimization.
Article
Engineering, Multidisciplinary
Kai Liu, Lu Meng, Ang Zhao, Zhonggang Wang, Leilei Chen, Pei Li
Summary: A hybrid Direct FE2 method is proposed to deal with strain localization, which models the low deformation gradient region using the D-FE2 method and the high deformation gradient region using the traditional FE method. Node displacement constraints are imposed at the interface between the two models to enforce energy equilibrium and deformation continuity. The method successfully predicts the strain localization behavior of multiscale materials or structures and demonstrates accuracy, efficiency, and ease of implementation.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Leilei Chen, Juan Zhao, Haojie Lian, Bo Yu, Elena Atroshchenko, Pei Li
Summary: In this article, an innovative method is proposed for broadband topology optimization of sound-absorbing materials. The method solves the Helmholtz equation for the acoustic problems and calculates the sensitivities of the objective function using a sensitivity analysis method. To address the computational cost issue, Taylor expansion and a reduced-order model are utilized.
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING
(2023)
Editorial Material
Physics, Multidisciplinary
Pei Li, Leilei Chen, Elena Atroshchenko
FRONTIERS IN PHYSICS
(2023)
Article
Engineering, Mechanical
Pei Li, Wei Chen, Desheng Li, Rufei Yu, Wenjing Zhang
JOURNAL OF COMPUTATIONAL AND NONLINEAR DYNAMICS
(2016)
Article
Engineering, Mechanical
Huiyi Yang, Yang Xu, Chao Xu
Summary: This study focuses on the impact of dry friction interfaces on the dynamics of jointed structures, particularly on the statistics of contact pressure distribution. Through experimental and simulation analysis, it is found that surface roughness and contact load have significant effects on contact area, contact stiffness, and mean contact pressure.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Guanglan Hu, Houfu Dai
Summary: The effect of metal coating on the machinability of cubic silicon carbide was investigated using molecular dynamics simulation. The results showed that the type of coating has a significant impact on cutting force, surface morphology, stress, and tool wear. Among the three metals studied, Cu coating had the greatest impact on improving cutting performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yunfan Liu, Guozheng Ma, Lina Zhu, Cuihong Han, Zhen Li, Bin Zhang, Haichao Zhao, Haidou Wang, Shuying Chen
Summary: The service performance of coated self-lubricating spherical plain bearings can be improved by applying self-lubricating coatings, especially double-sided coatings. The presence of a large-area and complete mixed friction transfer film on the contact surfaces can cause a signal downstage before the signal mutation stage.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
Article
Engineering, Mechanical
Yakup Artun, C. Oktay Azeloglu, Gokhan Taylan
Summary: This article investigates the tribological properties of polymer journal bearings, particularly focusing on radial journal bearings made from UHMWPE and POM materials with different surface qualities. The study examines the performance of these bearings under varying load and speed conditions, and analyzes the relationship between material and surface roughness in tribological performance.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2024)
