Article
Engineering, Mechanical
Xiaohui Lin, Shun Wang, Shuyun Jiang, Shaowen Zhang
Summary: This study investigates the influence of interface effect and cavitation bubble distribution on the dynamic characteristics of high-speed water-lubricated spiral groove thrust bearings. A turbulent cavitating flow lubrication model is established based on two-phase fluid and population balance equation of bubbles. The stiffness and damping coefficients of the bearings are calculated using perturbation pressure equations. Experimental results validate the theoretical model. The findings suggest that the turbulent effect has a greater impact on the dynamic characteristics of the bearings compared to the cavitation effect.
CHINESE JOURNAL OF MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Wei Cai, Xiaojun Fu, Shangjun Ma, Geng Liu
Summary: A meshing model for a planetary roller screw mechanism with misalignment is established in this study, and the meshing equations for the misalignment are derived to explore the characteristics of the mechanism. The maximum misalignment angle is obtained to determine the limit position. The effectiveness of the model is verified by comparing with a previous model, and the results show that misalignment has a significant impact on the meshing characteristics of the mechanism.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Physics, Multidisciplinary
Peng Li, Jiayu Li, Zhanqun Shi, Hao Zhang, Sen Xiao, Xin Li, Fengshou Gu
Summary: This study investigates the effects of manufacturing error and micro-groove on the static, dynamic, and stability characteristics of water-lubricated journal bearings. Mathematical models and simulations are used to evaluate the impact of these factors on the film thickness distribution, fluid pressure distribution, bearing capacity, and other parameters. The results show that manufacturing errors and micro-groove significantly affect the fluid film thickness and pressure distribution. The magnitude and type of errors can either improve or degrade the bearing performance, and micro-groove enhances the hydrodynamic effect in the bearing clearance.
Article
Chemistry, Analytical
Hengda Lei, Li Cao, Xiuhua Li
Summary: The state of angle cocks is crucial for the air connectivity of freight trains, and detecting their state can enhance the safety of train operations. This paper proposes a coarse-to-fine localization method to detect the misalignment state of angle cocks. Experimental results show that the proposed method achieves an accuracy of 96.49% for detecting misalignment state.
Article
Engineering, Mechanical
Jiajia Lu, Xianying Feng, Zhe Su, Yandong Liu, Dechen Wang
Summary: This paper proposes a novel dual-drive hydrostatic lead screw system (DDHLS) that offers better transmission performance and a lower feed speed compared to conventional hydrostatic lead screws (HLS). The research explores the influences of nut-misalignment, nut-radial-displacement, nut-tilt, and dual-drivable design on the transmission performance of the DDHLS. The results show that nut-misalignment can affect the axial load capacity, stiffness coefficient, and damping coefficient, while the dual-drivable design improves the axial load capacity and stiffness coefficient with minimal effect on the damping coefficient.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2022)
Article
Energy & Fuels
Hongliang Luo, Feixiang Chang, Cheng Zhan, Keiya Nishida, Yoichi Ogata, Jin Zhang, Jing Yao, Xiangdong Kong, Jingyu Zhu
Summary: This study used a multiple droplets producer to observe the impingement of multiple droplets on the wall at different injection pressures. Experimental results show that droplet behaviors near the wall can be recorded at T-slicer = 40 mu m during the injection. Additionally, observations of coalescence phenomenon of secondary droplets and splashing crown structures occurrence provide further insights into droplet size and velocity changes near the wall.
Article
Engineering, Mechanical
Donglin Li, Xianshuai Ma, Shuai Wang, Junhua Wang, Fang Yang, Yinshui Liu
Summary: A water lubricating axial piston pump (WLPP) is an important component of a green water hydraulic system. The friction and wear of the WLPP's friction pairs are crucial for its development. This study investigated the tribological properties of CFRPEEK with 316L and 1Cr17Ni2 under water lubrication using different testing methods. The results showed that CFRPEEK had a higher wear rate compared to the metal. The wear mechanism was mainly abrasive wear, and improving the wear resistance of metals is important for WLPP development.
Article
Engineering, Mechanical
Chao Wang, Mingkai Wang, Linbo Zhu
Summary: This paper investigates the effect of adding axial groove structures on the bearing lubrication efficiency through visual simulations and quantitative experiments. It analyzes the relationship between groove performance and working conditions. The results show that the bottom oil layer is crucial for enhancing lubrication efficiency, and the nozzle diameter should be larger than the groove width to maintain the stability of the bottom oil layer.
Article
Engineering, Mechanical
Shuiquan Huang, Weikang Lin, Xuliang Li, Zhiqi Fan, Hui Wu, Zhengyi Jiang, Han Huang
Summary: The study found that the use of hybrid nanosuspensions can reduce wear, improve worn surface quality, suppress adhesive wear, and prevent direct contact-induced friction for contact pairs with different roughness levels.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Engineering, Mechanical
Zhongliang Xie, Nawei Shen, Weidong Zhu, Wenchao Tian, Liang Hao
Summary: This paper investigates the influences of misalignment on the lubrication performances of water lubricated bearing, proposing a modified lubrication model. Results show that misalignment increases maximum pressure and shear stress, decreases minimum film thickness, reduces certain lubrication regions, ultimately deteriorating lubrication performances on the interface.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Leoluca Scurria, Dieter Fauconnier, Pavel Jiranek, Tommaso Tamarozzi
Summary: In this study, a novel model order reduction technique is proposed for reducing the dimensionality and computing time of the elastohydrodynamic problem, specifically for stationary Newtonian isothermal line contacts. The method employs Galerkin projection for the structural part and a hyper-reduction technique for the Reynolds equation, resulting in a significant reduction in computing time with a good correlation to results from the full order model.
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2021)
Article
Energy & Fuels
Huilong Chen, Zepeng Wei, Juncheng Lu, Kai Gui, Yingjian Chen, Qian Cheng, Yanxia Fu, Binjuan Zhao
Summary: This study established a multi-phase flow calculation model for mechanical face seal lubrication film and used numerical simulation to examine the effect of groove parameters on solid particles' deposition. The results showed that groove depth, spiral angle, groove diameter ratio, and groove width ratio all influenced the deposition rate.
Article
Engineering, Mechanical
Fangrui Lv, Chunxiao Jiao, Qian Jia, Kang Xia
Summary: This paper establishes a mixed lubrication model for water-lubricated polymer bearings considering the effect of journal misalignment, liner elastic deformation, and local turbulence. The influence of key structural and operating parameters on the bearing performance with journal misalignment is investigated.
Article
Engineering, Mechanical
Jianping Wang, Haifeng Ran, Peng Dai, Shuping Yan, Xingjia Yao, Fengtao Wang, Guizhong Zuo
Summary: This study aims to investigate the influence of shaft misalignment on the performance of herringbone groove thrust bearings. Computational fluid dynamics was used to analyze the flow of the liquid film. The results show that herringbone grooves create micro hydrodynamic effects, and the effects of shaft misalignment on lubrication and sealing performance can be observed.
INDUSTRIAL LUBRICATION AND TRIBOLOGY
(2023)
Article
Engineering, Mechanical
Nima Rezazadeh, Alessandro De Luca, Donato Perfetto
Summary: This article compares two intelligent methods for automatic detection of faults in rotary machines. The finite element method is utilized to model the faults and calculate the vibrational responses. Different types of features and machine learning classifiers are used for classification, and a novel approach based on convolution neural networks and persistence spectra is proposed. The results show that the proposed approach provides more accurate results compared to other classifiers.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2022)
Article
Engineering, Aerospace
Anand Pai, Arastu Sharma, Irene Mary Eby, Chandrakant R. Kini, Satish B. Shenoy
Summary: Orbital debris poses a constant threat to spacecraft and satellites, and it has become a growing concern with the increasing number of space objects. To protect against small debris or micrometeoroid orbital debris (MMODs), Whipple shields made of impact-resistant materials are used. This study used numerical simulations to investigate the damage and deformation behavior caused by hypervelocity impacts on monolithic and coated Whipple shields. The simulations were conducted using the AUTODYN(R) module of the ANSYS(R) finite element software at velocities of 3.5 km/s and 5.5 km/s.
Review
Computer Science, Interdisciplinary Applications
Kamat Harishkumar, Kini R. Chandrakant, Shenoy B. Satish
Summary: Fluid film bearings are widely used in high-speed industrial machineries and have been extensively studied using numerical methods. This paper reviews the various Computational Fluid Dynamics and Fluid-Structure Interaction techniques used to solve the flow equations for fluid film bearings, and compares the computed performance parameters.
ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING
(2023)
Article
Geography, Physical
K. R. Akshatha, A. K. Karunakar, B. Satish Shenoy, K. Phani Pavan, Chinmay V. Dhareshwar, Dennis George Johnson
Summary: Intelligent UAV video analysis has gained attention for its potential in computer vision applications. In order to address the challenge of small object detection, a Manipal-UAV person detection dataset was created, consisting of images captured from UAVs in varying conditions. The dataset provides a benchmark for evaluating state-of-the-art object detection algorithms on small person objects in aerial view scenarios. The dataset is publicly available for researchers to advance UAV and small object detection research.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Celine Gutmann, Numa Shaikh, B. Satish Shenoy, N. Shaymasunder Bhat, Laxmikant G. Keni, K. N. Chethan
Summary: The hip joint helps transfer weight from the upper body to the lower body, and artificial hip implants can replace degenerated hips. Wear between the joints is the primary cause of implant loosening, which can occur for various reasons. Small design changes can greatly improve the lifespan of the implant, and a decrease in TTR radius leads to a decrease in wear rate.
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS
(2023)
Article
Engineering, Civil
Anand Pai, Chandrakant R. Kini, Sriharsha Hegde, B. Satish Shenoy
Summary: Fiber metal laminates (FMLs) for blast and ballistic resistance applications require ballistic grade plies like aramid (Kevlar) and ultra-high molecular weight polyethylene (Spectra) as supporting layers, stacked in different orders based on functional grading. In this study, five FML sequences consisting of AA6061-T6, aramid, ultra-high molecular weight polyethylene, and paperboard were developed, with the novelty of layering based on shock impedance. Mechanical and damping performance were evaluated using various metrics, and the FML sequences BRSP-II and BRSP-IV demonstrated the best performance when a low-impedance ply (paperboard layer) was placed before the AA6061-T6 rear skin.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Numa Shaikh, B. Satish Shenoy, N. Shaymasunder Bhat, Sawan Shetty, K. N. Chethan
Summary: The hip joint is crucial for transmitting weights in daily activities, and wear is the main cause of loosening of hip implants. Wear assessment during the design stage can provide information on implant life expectancy and make adjustments to enhance it, reducing the need for revision surgery. This study estimated linear wear at the contact surfaces of the femoral head to the acetabular cup and backing cup. Different material combinations were tested, and the CoCr combination showed the lowest wear rate. These designs can be 3D-printed and tested in a hip simulator.
COGENT ENGINEERING
(2023)
Review
Engineering, Civil
Anand Pai, Marcos Rodriguez-Millan, Masuhiro Beppu, Borja Valverde-Marcos, B. Satish Shenoy
Summary: This paper reviews the latest experimental techniques for characterizing the impact resistance, shock energy absorption, high strain-rate responses and endurance of materials used for shielding in blast and ballistic impact scenarios. It provides insights into various testing methods and strategies for high-performing shielding configurations.
THIN-WALLED STRUCTURES
(2023)
Article
Energy & Fuels
Manjunath Shetty, Karnan Manickavasakam, Chethan Sabbanahalli, Chandrakantha Bekal, Izan Izwan Misnon, Ashwath Subrahmanya, Kunal Roy, Prasanna D. Shivaramu, Satish Shenoy, Dinesh Rangappa
Summary: The application of novel three-dimensional (3D) architectures in energy storage has attracted researchers' interest for its potential in advancing technological advancements. This study utilizes the supercritical water method to synthesize a hierarchical three-dimensional Bi2WO6 microsphere/Reduced Graphene Oxide (BWS/RGO) nanocomposite, showing promising results in terms of sample characteristics, morphological properties, and electrochemical behavior for lithium-ion storage and supercapacitor studies.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Dentistry, Oral Surgery & Medicine
Karishma S. Talreja, Shobha J. Rodrigues, Umesh Y. Pai, Thilak Shetty, Sharon Saldanha, M. Mahesh, Puneeth Hegde, Satish B. Shenoy, Nithesh Naik, Sandipan Mukherjee, Ann Sales, Vignesh Kamath, Prashant Bajantri
Summary: This study evaluated the stress distribution in short dental implants with different implant-abutment connections using finite element analysis. The results showed that splinting of short implants resulted in reduced and more uniform stress and microstrain, especially under oblique loading. The microstrain values for all connections evaluated were within the safe range for clinical use.
INTERNATIONAL JOURNAL OF DENTISTRY
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
John Valerian Corda, K. N. Chethan, N. Shyamasunder Bhat, Sawan Shetty, B. Satish Shenoy, Mohammad Zuber
Summary: This study investigates the impact of patient-specific dynamic loadings on the evaluation of hip implants and explores the effects of different materials and profiles on stress and displacement. The results suggest that using UHMWPE as the acetabular cup material can effectively prevent squeaking after replacement.
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS
(2023)
Article
Engineering, Mechanical
Ragavanantham Shanmugam, Satish Shenoy Baloor, Ugur Koklu, Ashwin Polishetty, Gururaj Bolar
Summary: The study evaluates the use of helical milling in hole processing for titanium alloys. The results show that helical milling can reduce machining temperature, improve surface roughness, and decrease the size of exit burrs compared to traditional drilling. However, helical-milled holes exhibit higher subsurface microhardness than conventionally drilled holes. The process variables have a significant impact on machining temperature.
Article
Nanoscience & Nanotechnology
Nur Marini Zainal Abidin, Mohamed Thariq Hameed Sultan, Ain Umaira Md Shah, Farah Syazwani Shahar, Muhammad Imran Najeeb, Mohd Radzi Ali, Adi Azriff Basri, Satish Shenoy Baloor, Milan Gaff, David Hui
Summary: This study aims to investigate the use of hybrid composite materials with honeycomb structure in aircraft structures. By replacing synthetic fiber with natural fiber and using a honeycomb core, the mechanical strength of the composites was analyzed. The results showed promising properties for the newly developed GKHKG composite, making it suitable for semi-structural and structural light-weight applications.
REVIEWS ON ADVANCED MATERIALS SCIENCE
(2023)
Article
Multidisciplinary Sciences
Anand Pai, Marcos Rodriguez-Millan, Chandrakant R. Kini, B. Satish Shenoy
Summary: This study aims to develop hybrid Fiber Metal Laminates (FMLs) for shock shielding. Shock experiments and numerical simulations are conducted using a multi-layered FML configuration with different materials. The results reveal a significant influence of core layer arrangement on the deformation of FMLs.
SCIENTIFIC REPORTS
(2023)
Article
Thermodynamics
Jayakrishnan Radhakrishnan, Surya Sridhar, Mohammed Zuber, Eddie Y. K. Ng, B. Satish Shenoy
Summary: This study focuses on the conceptual design optimization of a Contra-Rotating VAWT (CR-VAWT) using Taguchi method and CFD. The results indicate that blade height has the greatest impact on the performance of CR-VAWT, while the number of blades has the least impact. Proper selection of design parameters can lead to better performance of CR-VAWT compared to conventional VAWT.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Multidisciplinary Sciences
Anand Pai, Marcos Rodriguez-Millan, Chandrakant R. Kini, Ravindra Mallya, Chandrakantha Bekal, Suhas Yeshwant Nayak, Satish B. Shenoy
Summary: Fiber-metal laminates (FMLs) have significant potential in various applications and are particularly crucial for aircraft structures exposed to shock wave and high velocity impacts. This study focuses on developing custom shielding laminates and analyzing the impact of shock impedance tuning on the behavior of FMLs at high strain rates. The results show improved energy absorption and transmission loss for certain laminates, indicating the effectiveness of the shock impedance matching approach.
SCIENTIFIC REPORTS
(2023)
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)
