Article
Computer Science, Interdisciplinary Applications
Yu Chen, Jun Feng, Xu Peng, Yu Sun, Qiang He, Chengtao Yu
Summary: This paper presents the development of a dynamic model for planar multibody systems with clearance joints, using various models to describe the dynamic characteristics of clearance joints and verifying the correctness and effectiveness of the method through experiments.
ENGINEERING WITH COMPUTERS
(2021)
Article
Chemistry, Analytical
Zhengfeng Bai, Zhiyuan Ning, Junsheng Zhou
Summary: This study investigates the wear characteristics of dry revolute clearance joints in planar mechanisms using a computational methodology. Models for normal contact force, tangential friction force, and dynamic wear are established. The dynamic wear depths of clearance joints are obtained through two steps: dynamics analysis and wear depth analysis. A planar slider-crank mechanism is used as an example to study the wear characteristics of clearance joints in mechanical systems.
Article
Acoustics
Zheng Feng Bai, Xin Jiang, Ji Yu Li, Ji Jun Zhao, Yang Zhao
Summary: This article investigates the dynamic responses of a mechanical system with 3D revolute clearance joint considering both radial and axial clearances, establishing mathematical models and contact force models. Demonstrative application examples are presented to illustrate the dynamic characteristics.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Article
Engineering, Mechanical
Zhen Zhou, Xudong Zheng, Qi Wang, Zhang Chen, Yiyong Sun, Bin Liang
Summary: The paper presents a modeling method and algorithm for point contact non-smooth multibody system based on the 2D LuGre friction model. Parameter identification and dynamic modeling were discussed, showing the effectiveness of the method in simulating stick slip motion and simplifying numerical algorithms. The method was applied to wheel mechanisms with single-point and multi-point contact, demonstrating its ability to analyze stick-slip motions.
MECHANISM AND MACHINE THEORY
(2021)
Article
Mechanics
P. Millan, J. Pagaimo, H. Magalhaes, J. Ambrosio
Summary: This study investigates the effect of different tangential contact models on the dynamic response of railway vehicles. The results show that the choice of friction models has a significant influence on the dynamic performance of locomotives during curve transitions, while straight tracks and curves with constant radius are relatively unaffected. The study highlights the importance of selecting appropriate friction models and the Stribeck velocity in modelling friction-damped suspensions of railway vehicles.
MULTIBODY SYSTEM DYNAMICS
(2023)
Article
Engineering, Civil
Tolga Kuskun, Jerzy Smardzewski, Ali Kasal
Summary: This study designed and manufactured different types of auxetic dowels, analyzing their installation force, contact pressure, and friction coefficient in particleboard. The auxetic dowels have negative Poisson's ratios, lower installation force than non-auxetic dowels, and lower contact pressures on their surface.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Mechanical
Xiulong Chen, Weitao Yang
Summary: The presence of clearances in the mechanism can reduce motion precision and working performance. The 3-RRRRR mechanism requires high precision. Modeling and analysis can verify the impact of axial clearances on the dynamic characteristics of the mechanism and validate the correctness of the mathematical model.
NONLINEAR DYNAMICS
(2021)
Article
Chemistry, Multidisciplinary
Yuan Wang, Ruiqin Li, Juan Liu, Zengyu Jia, Hailong Liang
Summary: Precisely fitting the bottom sticker of the wine box base to the base model is crucial in the production line. The study investigates how the assembly robot's joint clearance affects the precision of the wine box base assembly. Analyzing the axial and radial clearances in the robot's 3D revolute joint, the research presents various contact forms between bearings and journals, along with different modes of contact. Contact force models are established using the Lankarani-Nikravesh contact model and modified Coulomb friction law. The analysis reveals that larger clearances significantly impact the dynamic characteristics of the robot's end effector.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Mechanical
Xinchen Zhuang, Tianxiang Yu, Jingyi Liu, Bifeng Song
Summary: This study conducts kinematic reliability analysis of high-precision planar mechanisms experiencing non-uniform wear. A wear prediction method based on Archard's wear model is presented, and the maximum entropy model and numerical integration are used to calculate kinematic reliability. A Monte Carlo simulation based method is developed for reference solution calculation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Multidisciplinary
Chen Zhi-qun, Qian Lin-fang, Chen Guang-song, Nie Shou-cheng, Yin Qiang, Yue Cai-cheng
Summary: In this study, a modeling method is presented to investigate the dynamic characteristics of a hydraulically driven shell manipulator with revolute clearance joints. The model takes into account the effects of clearance, flexibility of the rotating beam, and the coupled dynamic characteristics of the hydraulic cylinder. A modified contact force model is developed to simulate the physical properties of realistic revolute joints with small clearances, heavy loads, and variable contact stiffnesses and damping coefficients. The system equation of motion, taking into consideration the strong coupling relationship between the hydraulic cylinder and the flexible beam, is established. Experimental validation is achieved through a test system for the shell manipulator, and the effects of clearance size and cylinder support stiffness on the dynamic response are investigated.
DEFENCE TECHNOLOGY
(2022)
Article
Thermodynamics
Zhimin Wang, Guoguang Jin, Zhan Wei, Dong Liang, Boyan Chang, Yang Zhou
Summary: This study proposes an approach to analyze and quantify the irregular wear effect of a planar multi-body mechanical system with multi-clearances. Using the classical planar four-bar linkage as an example, the mechanism of irregular wear effect in multi-body systems with multi-clearances is studied. The system dynamic equation is established using the Lagrange multiplier method, and the contact force and friction during contact collision are modeled using the Lankarani-Nikravesh (L-N) nonlinear contact force and LuGre models. A wear depth prediction model for multi-clearance joints is built based on Archard's equation. The study comprehensively investigates the influence of crank speed, clearance number, clearance position, and clearance size on the wear effect of multi-clearance systems.
ADVANCES IN MECHANICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Binxin Fu, Rosa M. Espinosa-Marzal
Summary: Nanoscale friction measurements were conducted on calcite single crystals to study the influence of surface roughness, contact aging, and different environments. The results showed that friction behavior varied significantly between dry and aqueous environments, with water environment even eliminating velocity-weakening friction caused by atomic attrition. Friction rate parameters and memory distance also exhibited differences between dry and aqueous environments, with implications for understanding fault stability and friction laws.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Engineering, Mechanical
Xun Wang, Xiaoting Rui
Summary: This study establishes a rigid-flexible coupling multibody dynamics model of a tracked armored vehicle, considering the clearance between trunnion and bearing. Numerical simulations are performed to analyze the influence of this clearance on the vibration characteristics of the vehicle.
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
(2021)
Article
Mechanics
G. Rill, T. Schaeffer, M. Schuderer
Summary: The LuGre model is frequently used for analyzing and controlling friction systems. However, it has drawbacks, such as low break-away forces, force rate-dependency, drift problems during sticking, and differences between the pre-defined friction law and the one produced by the LuGre model. These drawbacks are caused by a simplistic and inconsistent modeling of bristle dynamics rather than the model dynamics or its nonlinearity.
MULTIBODY SYSTEM DYNAMICS
(2023)
Article
Automation & Control Systems
Kaiyu Dai, Zhencai Zhu, Gang Shen, Yu Tang, Xiang Li, Wei Wang, Qingguo Wang
Summary: This paper proposes a modified LuGre model and an adaptive friction compensation control scheme to address the complex friction behaviors and improve the force tracking performance of controllers in electrohydraulic systems with low load. The effectiveness of the proposed controller is verified through comparative experiments in static and dynamic loading modes.
CONTROL ENGINEERING PRACTICE
(2022)
Article
Engineering, Mechanical
Jia Ma, Linfang Qian, Guangsong Chen, Miao Li
MECHANISM AND MACHINE THEORY
(2015)
Article
Engineering, Multidisciplinary
Jia Ma, Linfang Qian, Guangsong Chen
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2016)