Article
Engineering, Mechanical
Dharmender Jangra, Harish Hirani, Ashish K. Darpe
Summary: This study explores the accelerated gear failures caused by geometric stress concentration induced by misalignment. A mathematical model using MATLAB is derived to assess the effects of misalignment on sliding wear of driver gears. The accuracy of the model is validated through literature and experiments. A parametric study investigates the impact of design parameters on wear in combined misaligned gear pairs. Findings show that radial misalignment increases pressure and sliding wear in the single-tooth contact zone, axial misalignment decreases the contact zone and leads to increased wear throughout the mesh cycle, and angular misalignment reduces the contact zone and results in non-linear wear distribution along the tooth flank. Combined misalignment has the most severe effects, causing higher contact pressure, non-linear wear distribution, and increased wear in transition zones.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Engineering, Mechanical
Yabin Guan, Jigang Chen, Zongde Fang, Shengyang Hu
Summary: This study proposes a quick multi-step discretization and parallelization wear simulation model to reduce the computational costs associated with the wear simulation of crown gear coupling. It combines the finite element method, kinematic analysis, and Archard's formula to predict tooth surface wear. The research explores the characteristics of relative sliding distance, as well as the effects of misalignment angle and load torque on wear depth.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Mechanical
Hongxu Tian, Hongzheng Han, Zhifang Zhao, Chenyi Han, Hui Ma
Summary: This paper focuses on the effect of angular misalignment on wear prediction of a planetary gear set with a rotating carrier. The study calculates the wear depth based on Archard's wear theory, obtains the load distribution using the 3D loaded tooth contact analysis method, and considers the effect of angular misalignment by introducing changes in meshing clearance. The results show that angular misalignment affects wear depth and gear performance, with greater wear on the sides of the face width and the largest difference at the root. The study also finds that the rotating carrier affects the time-varying mesh stiffness and backlash of the gear pairs, with a cycle half that of the carrier rotation.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Lantao Yang, Qiang Zeng, Haishi Yang, Liming Wang, Guorong Long, Xiaoxi Ding, Yimin Shao
Summary: A new mesh stiffness calculation model for misaligned gears considering the effects of tooth contact state is proposed in this study. The influence of shaft misalignment on tooth contact state changes and gear system dynamic characteristics is investigated.
NONLINEAR DYNAMICS
(2022)
Review
Engineering, Mechanical
Guang Zhao, Xiangyang Zhao, Liting Qian, Yunbo Yuan, Song Ma, Mei Guo
Summary: Splines in aviation are essential due to their simplicity, reliability, and high power. However, they often suffer from widespread failures due to severe mechanical loads and various operating environments. Research has been conducted since the 1960s to understand aviation splines, focusing on failure types, fatigue strength, contact stress, lubrication effects, misalignment, and experiments. Crowning and oil lubrication are effective measures to mitigate wear in splines, and future development directions are also discussed.
Article
Engineering, Mechanical
Xinran Zhao, Andrea Vacca
Summary: This paper introduces a multi-domain dynamic simulation model for continuous-contact helical gear pumps, which can be used to optimize hydraulic pump designs and provide better dynamic balancing.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Maksat Temirkhan, Hamza Bin Tariq, Konstantinos Kaloudis, Christos Kalligeros, Vasilios Spitas, Christos Spitas
Summary: Quasi-static modelling of non-conjugate contact of tooth-modified spur and helical gears has been studied extensively. This study introduces a novel, computationally efficient, stable, and unconditionally convergent model for non-conjugate tooth contact in three dimensions. The model is applied to evaluate the sensitivity of various misalignments on the contact path, transmission error, and contact pressure in crowned spur and helical gears. Performance metrics are defined and three different crowning modification functions are compared.
APPLIED SCIENCES-BASEL
(2022)
Article
Mechanics
Desheng Zou, Liming Wang, Lantao Yang, Wennian Yu, Lu Xie
Summary: This article proposes a method based on slice coupling and nonlinear Hertzian contact calculation to study the influences of angular misalignment and tooth axial modification on the dynamic characteristics of gears. The results show that the proposed model is effective in predicting the dynamic response of gears under the coupled effects of angular misalignment and tooth modification.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Engineering, Mechanical
Fangyan Zheng, Jun Zhang, Ligang Yao, Rulong Tan
Summary: Recent studies have shown that proper cutter modification can enhance the wear resistance of gears, reducing wear and increasing the gear's lifespan.
Article
Engineering, Mechanical
Zhan Yie Chin, Wade A. Smith, Pietro Borghesani, Robert B. Randall, Zhongxiao Peng
Summary: Gear transmission error (TE) is a promising diagnostic tool as it is less affected by transfer path and can be conveniently measured using shaft encoders. Analysis of TE signals can provide information about gear wear depth and deviations from the perfect involute tooth profile, which are crucial in gear diagnostics.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Polymer Science
Christoph Herzog, Michael Wolf, Dietmar Drummer
Summary: The wear behavior of PBT-steel gear sets under temporarily changed load has been investigated using an in situ gear test rig. The results show that the applied load spectrum determines the resulting tooth flank wear, and the load history also plays an important role in the wear behavior.
Article
Engineering, Mechanical
Thomas Hagemann, Huanhuan Ding, Esther Radtke, Hubert Schwarze
Summary: In recent years, the application of sliding planet gear bearings in wind turbine gearboxes has become more common. Research has shown that radial clearance and axial crowning are important design parameters to reduce maximum pressures at the bearing edges. Additionally, a detailed analysis of the gear mesh load distribution is required to characterize bearing operating behavior at part-load.
Article
Engineering, Mechanical
Wei-qiang Zhao, Jie Liu, Wen-hui Zhao, Hao Wang, Na Yang
Summary: A gear-bearing dynamic model is proposed to investigate the vibration features of a system with a misaligned shaft angle. The model considers time-varying mesh stiffness, time-varying pressure angle, and eccentricity, and is solved using the fourth-order Runge-Kutta. The results show that the misaligned shaft angle affects the mode of the system and decreases the meshing stiffness.
NONLINEAR DYNAMICS
(2023)
Article
Mathematical & Computational Biology
Song Ding
Summary: This study proposes a multiphase transmission silent chain technology to improve traditional chain transmission. The technology has advantages such as high precision, low noise, and suitability for high speed and heavy loads. Through topological optimization design, the transmission chain is lightweighted, and dynamic simulations and analysis are conducted. The results show that the model accurately predicts the dynamic behavior of the system, which is helpful for practical control system design.
COMPUTATIONAL INTELLIGENCE AND NEUROSCIENCE
(2022)
Article
Engineering, Mechanical
Rajeev Kumar, Ranjan Kumar Mitra, Rahul Dewangan, Chintamani Mishra
Summary: Gears are crucial in transmitting power in spinning machinery, and faults in gears can cause machine breakdown. Therefore, monitoring the condition of gears is essential to avoid failures. This study analyzes the response of a simple bevel gear train under wear and tear using two different models. The results show that faulty gear trains have higher vibration amplitudes and more peaks at gear mesh frequencies in the envelope spectrum.
Article
Engineering, Mechanical
M. Chapron, P. Velex, J. Bruyere, S. Becquerelle
JOURNAL OF MECHANICAL DESIGN
(2016)
Article
Engineering, Mechanical
Nicolas Voeltzel, Yann Marchesse, Christophe Changenet, Fabrice Ville, Philippe Velex
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2016)
Article
Acoustics
B. Guilbert, P. Velex, D. Dureisseix, P. Cutuli
JOURNAL OF SOUND AND VIBRATION
(2019)
Article
Engineering, Mechanical
Michal Ruzek, Fabrice Ville, Philippe Velex, Jean-Baptiste Boni, Yann Marchesse
MECHANISM AND MACHINE THEORY
(2019)
Article
Engineering, Mechanical
Q. Thoret-Bauchet, P. Velex, M. Guingand, P. Casanova
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Mechanical
Stephane Portron, Philippe Velex, Vincent Abousleiman
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Mechanical
J. Bruyere, P. Velex, B. Guilbert, D. R. Houser
MECHANISM AND MACHINE THEORY
(2019)
Article
Engineering, Mechanical
B. Guilbert, P. Velex, P. Cutuli
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2019)
Article
Engineering, Multidisciplinary
M. Ruzek, Y. Marchesse, F. Ville, P. Velex
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2019)
Article
Engineering, Mechanical
Ph Sainsot, Ph Velex
MECHANISM AND MACHINE THEORY
(2020)
Article
Engineering, Multidisciplinary
B. Guilbert, P. Velex
Summary: This paper analyzes the effect of thin-webbed/-rimmed and flexible gear bodies on dynamic tooth loads using an approximate dynamic factor formula. The results show that there is reasonable agreement between the outcomes from the approximate dynamic factor formula and those from the complete FE model, even though the influence of rotating gear body cannot be accounted for. This good agreement indicates that dynamic couplings between dynamic mesh forces and gear body elasticity remain moderate for the tested geometries.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2021)
Article
Engineering, Multidisciplinary
Y. Marchesse, M. Ruzek, F. Ville, P. Velex
Summary: It is commonly acknowledged that load-independent losses in high-speed gears can increase significantly at peripheral speeds exceeding 100 m/s. This study demonstrates that the installation of axial flanges close to gear faces can greatly reduce windage power losses. The research also examines the impact of various parameters, such as the number of flanges, gear module, and gear geometry, on power loss reductions. Ultimately, an approximate equation is proposed for estimating power loss reductions during the design phase.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2021)
Article
Engineering, Mechanical
A. Pige, P. Velex, R. Lanquetin, P. Cutuli
Summary: An original mesh interface model was proposed for static and dynamic simulations of bevel gears, which does not require any assumptions on tooth contact locations. The model incorporates elastic couplings between contact points and was shown to be accurate through comparisons with experimental results. By using a time-step integration scheme and unilateral normal contact algorithm, instant contact patterns, loads, and transmission errors can be obtained. It was found that load has a significant influence on contact conditions in bevel gears, and dynamic effects can lead to overloads and oscillatory contact patterns near critical speeds, highlighting the potential interactions between local and global scales.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Mechanical
J. Bruyere, Ph Velex
Summary: This study presents theoretical results on mesh elasticity and contact patterns in narrow-faced spur and helical gears, and provides semi-analytical definitions of optimum combinations of profile relief and lead crown to minimize the time-variation amplitudes of transmission error. Extensive comparisons with a benchmark code demonstrate the soundness and efficiency of the proposed methodology. Dimensionless performance diagrams are derived from systematic simulations, revealing general trends in gear macro- and micro-geometries and enabling precise definition of optimum tooth modifications. The importance of face contact ratio and the specific influence of loading are highlighted in the study.
MECHANISM AND MACHINE THEORY
(2022)
Article
Acoustics
N. Sainte-Marie, P. Velex, G. Roulois, J. Caillet
JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME
(2017)
Article
Engineering, Mechanical
Antonella Castellano, Pietro Stano, Umberto Montanaro, Marco Cammalleri, Aldo Sorniotti
Summary: This paper proposes a new control strategy for hybrid electric vehicles, called Model Predictive Control (MPC), and considers the losses in transmission gears. Through a case study on Chevrolet Volt, the results show that the simplified internal model has a minor impact on fuel consumption performance.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Rui Peng, Gregory S. Chirikjian
Summary: This article introduces a method of designing morphable thick-panel origami structures using reconfigurable linkages, which improves the potential of origami techniques for different tasks and solves the limitations of one-DOF and multiple-DOF folding structures.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Gaohan Zhu, Weizhong Guo, Yinghui Li, Youcheng Han
Summary: Comprehensive and accurate performance evaluation is crucial for profile synthesis and analysis of higher pair mechanisms. This paper proposes evaluation indices and methods for the transmission performance of planar higher pair mechanisms from different perspectives. It subdivides the transmission performance into element-based performance and joint-based performance and develops novel indices specific to higher pair mechanisms. A graphical mapping method based on element-based performance is also proposed for intuitive analysis. Practical examples validate the effectiveness of the proposed indices and methods for evaluating the performance of higher pair mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Ke Wu, Gang Zheng, Guimin Chen, Shorya Awtar
Summary: Researchers proposed a new modeling method, namely Body-frame Beam Constraint Model (BBCM), to predict and optimize the design of high-precision compliant mechanisms (CMs).
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Youcheng Han, Weizhong Guo, Changjie Zhao, Ziyue Li, Ze Fu, Yinghui Li
Summary: This study proposes a structural synthesis methodology that considers motion, force, and energy characteristics simultaneously to design efficient mechanisms.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Cristian Enrico Capalbo, Daniel De Gregoriis, Tommaso Tamarozzi, Giuseppe Carbone, Domenico Mundo
Summary: This study proposes a novel flexible multibody formulation that enables efficient updating of models while maintaining small size and high accuracy. Numerical validation demonstrates its wide applicability across various materials and mechanisms, showing promising results in terms of accuracy.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Weihao Zhao, Junbei Liao, Wei Qian, Haoyong Yu, Zhao Guo
Summary: This paper presents a newly designed compliant actuator using a tensile springs array to address the challenges in achieving linear and consistent elastic properties, low friction, minor hysteresis, and good compliance in series elastic actuators (SEA). The unique geometry of the spring array enables the SEA to have consistent rotary stiffness with minimal friction and hysteresis. The device's performance is evaluated using PID and sliding mode control, demonstrating its constant low rotary stiffness and torque tracking bandwidth, making it suitable for human-robot interaction requirements.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Mohui Jin, Yukang Luo, Xing Xu, Bowei Xie, Weisheng Wang, Zewei Li, Zhou Yang
Summary: This paper presents a method for evaluating the contact interaction between compliant mechanisms and external objects. By establishing a numerical model and introducing contact springs to describe the contact forces, the deformation and normal contact force/stress can be accurately calculated. The static equilibrium configuration and contact force/stress can be obtained by minimizing the total potential energy function of the system.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Alejandro G. Gallardo, Martin A. Pucheta
Summary: This paper presents a method for the synthesis of parallel flexure systems using Screw Theory and Linear Algebra. The method is validated through three case studies and offers a simple and precise design with decoupled actuators.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Xiao Wang, Chenglin Liu, Haoxiang Sun, Hanwen Song
Summary: This paper presents a new decomposition mode for robot-world calibration, which decomposes the Ad(SE(3)) equation using Chasles' motion. A two-step method based on point set matching is proposed. The superiority of this method is verified through simulations and experiments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Yanlin Chen, Xianmin Zhang, Yanjiang Huang, Yanbin Wu, Jun Ota
Summary: This study establishes an error model for a 3-RRR+UR spherical parallel mechanism and analyzes the sensitivity of error parameters. A design structure is proposed to reduce input errors based on the analysis. Experimental results show that the multiloop circuit incremental method provides more accurate results.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Vu Linh Nguyen, Chin-Hsing Kuo, Po Ting Lin
Summary: This paper presents a method for analyzing the performance of gravity-balanced serial robotic manipulators under dynamic loads and uses a three-degree-of-freedom planar serial manipulator as a case study. The significance of this method is demonstrated by evaluating the impact of dynamic loads on gravity-balanced performance and proposing a step-by-step design procedure to improve it.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Shifeng Rong, Jiange Zhang, Xing Zhang, Keliang Li, Kaibin Rong, Zhenyu Zhou, Han Ding
Summary: This article proposes a data-driven dry cutting tool collaborative optimization model to improve the economic and environmental attributes of facehobbing hypoid gears. An innovative ease-off tooth contact analysis method is introduced to establish accurate relations between ease-off flank and loaded contact performance evaluations. The proposed model significantly improves sustainability in terms of economic and environmental assessments.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Kemal Eren, Soley Ersoy, Ettore Pennestri
Summary: This research investigates the instantaneous kinematics of the terminal link of a planar two-link open chain using the complex-number technique and higher-order instantaneous invariants.
MECHANISM AND MACHINE THEORY
(2024)
Article
Engineering, Mechanical
Bo Han, Zhantu Yuan, Jiachuan Zhang, Yundou Xu, Jiantao Yao, Yongsheng Zhao
Summary: This paper proposes novel deployable mechanism units with self-limiting position function, and constructs ring truss deployable mechanisms. The degrees of freedom (DOF) of deployable units are analyzed and it is proved that the constructed ring truss deployable mechanisms have only one DOF. The dynamic model of the deployable mechanism unit with passive actuation is established and verified by simulation. The deployable mechanism units proposed in this paper have the advantages of good scalability and stability, and have broad application prospects.
MECHANISM AND MACHINE THEORY
(2024)
