scholarly journals Analysis of Vertical Stiffness Characteristics Based on Spoke Shape of Non-Pneumatic Tire

2021 ◽  
Vol 11 (5) ◽  
pp. 2369
Author(s):  
Jongkeun Sim ◽  
Jiyeon Hong ◽  
Insu Cho ◽  
Jinwook Lee
Keyword(s):  
Three Dimensional ◽  
Structure Design ◽  
Minimum Size ◽  
Three Dimensional Model ◽  
Pneumatic Tire ◽  
Vertical Stiffness ◽  
Applied Model ◽  
Stiffness Characteristics ◽  
Tire Models ◽  
Pneumatic Tires

Recently, research regarding non-pneumatic tires that are resistant to punctures has been actively conducted, and the spoke structure design of non-pneumatic tires has been found to be a crucial factor. This study aimed to analyze the vertical stiffness characteristics of a non-pneumatic tire based on the shape of the spoke under the application of a vertical load. The three-dimensional model of a commercial non-pneumatic tire was obtained from the manufacturer (Kumho Tire Co., Inc., Gwangju, Korea), and the vertical stiffness characteristics of the three tire models with modified spoke shapes were compared and analyzed based on a reference tire model. Results show that the vertical stiffness of the fillet applied model is most appropriate. Furthermore, the vertical stiffness characteristics of the analyzed tire models indicate that if fillets with a minimum size are applied to the spokes, the stability of the non-pneumatic tire is expected to improve.

Investigation of Dynamic Photoelasticity Based on a Three-Dimensional Model

2011 ◽  
Vol 83 ◽  
pp. 261-266
Author(s):  
Bin Li ◽  
Guo Biao Yang ◽  
Fan Ni ◽  
Qi Rong Zhu
Keyword(s):  
Boundary Conditions ◽  
High Speed ◽  
Three Dimensional ◽  
Green Laser ◽  
Structure Design ◽  
Dynamic Photoelasticity ◽  
Three Dimensional Model ◽  
Design And Optimization ◽  
True Value ◽  
Dimensional Models

Dynamic photoelasticity has been widely utilized to investigate the phenomena generated by impact loading. The dynamic parameters of structures, such as propagation of stress wave and stress concentration, are obtained through this method, which provide guidelines for structure design and optimization. In the previous studies, two-dimensional models are wildly used by researchers. In these models, the inaccuracy of the boundary conditions leads to error amplification during the conversion of the tested results into real ones. In this study of dynamic photoelasticity, three-dimensional models are used. An improved digital dynamic photoelastic system is also adopted to calculate elastic wave propagation in the medium, where the diode-pumped solid-state green laser and high-speed CCD are used as light source luminaries and recording system respectively. Based on these models, where the boundary conditions approach to true value, the resulting data are higher in resolution than is possible with other experimental techniques. This method has been adopted and tested successfully by generating better results with less amplification of errors.

Static three-dimensional modelling of pneumatic tyres using the technique of element overlaying

2002 ◽  
Vol 216 (9) ◽  
pp. 709-716 ◽  
Author(s):  
J Pelc
Keyword(s):  
Three Dimensional ◽  
Two Dimensional ◽  
Vertical Load ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Tyre Model ◽  
Radial Stiffness ◽  
Rubber Composite ◽  
Stiffness Characteristics ◽  
Incompressible Rubber

The aim of the paper is to propose and verify an effective method for the realistic modelling of pneumatic tyres. A static, three-dimensional model of a pneumatic tyre, based on the finite element (FE) program MARC, is presented. The cord-rubber composite was modelled by overlaying the elements characterizing the cord and those representing incompressible rubber. A two-dimensional model was used to simulate the tyre mounting and inflation process. The model was then developed into a three-dimensional one. The displacements, radial stiffness and delamination stresses caused by the vertical load were determined. The shape of the tyre footprint and the pressure distribution in this zone were also predicted. Good correlation between measured and computed stiffness characteristics was observed. The proposed technique of element overlaying yields a tyre model that is numerically more stable than that using only orthotropic elements (very stiff cord merged with compliant rubber).

Structure Design and FE Analysis of a Newly Basketball Wheelchair

2008 ◽  
Vol 44-46 ◽  
pp. 685-690
Author(s):  
Lei Lei ◽  
Tian Min Guan ◽  
Li Jun Shan
Keyword(s):  
Three Dimensional ◽  
Work Conditions ◽  
Structure Design ◽  
Human Engineering ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Engineering Theory ◽  
Development Level ◽  
The Finite Element Analysis

Based on the human engineering theory the structure of the new Basketball wheelchair is designed. And the three dimensional model is drawn by means of the PRO/E software after the design. Next, the finite element analysis computation on the wheelchair structure is completed under the four work conditions by I-DEAS software. The result shows that its intensity satisfies the operation requirements and proves that the new Basketball wheelchair is comfortable, safe and reliable. The research of this paper has a more vital significance for enhancing the performance of basketball wheelchair and the development level of sport wheelchair.

Finite Element Analysis of Multi-Ropes Friction Hoister Main Shaft

2012 ◽  
Vol 538-541 ◽  
pp. 1935-1938 ◽  
Author(s):  
Ming Xia Yan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Structure Design ◽  
Main Shaft ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Operation Conditions ◽  
The Finite Element Analysis ◽  
Optimal Designing

Three-dimensional model of the main shaft of JKM4×4 hoister was built based on Pro/E. After having applied boundary conditions and loads to the model, the finite element analysis for the main shaft was conducted under extreme operation conditions with ANSYS, the stress and displacement distribution was presented and the stress biggest hazard points were found. Based on the analysis results, improvement methods for the main shaft structure design was given out, which provides references for further optimal designing the main shaft of hoister.

The Three-Dimensional Contact Patch Stress Field of Solid and Pneumatic Tires

1992 ◽  
Vol 20 (1) ◽  
pp. 3-32 ◽  
Author(s):  
M. G. Pottinger
Keyword(s):  
Boundary Condition ◽  
Friction Coefficient ◽  
Stress Field ◽  
Three Dimensional ◽  
Vehicle Control ◽  
Operating Conditions ◽  
Pneumatic Tire ◽  
Contact Patch ◽  
Control Forces ◽  
Pneumatic Tires

Abstract Contact patch (footprint) physics is fundamental to the generation of vehicle control forces, tire and road wear, and tire structural mechanics. Footprint physics depends strongly on tire design, pavement topography, and operating conditions. This paper discusses the three-dimensional contact patch stress field of two generic tire types: solid and pneumatic. The discussion is limited to the comparison of the static and free rolling states of both tire types, examination of the effect of the bead-rim boundary condition in the pneumatic tire, and a brief look at the effect of the friction coefficient and viscoelasticity on the solid tire. The discussion is based on experimental results for a smooth-treaded urethane solid tire and a low-pull-force smooth-treaded radial which are assumed to generally represent solid and pneumatic tires. The results obtained offer significant guidance to those who are attempting to mathematically model tires, understand wear, and comprehend the physics of the tire contact patch.

The Influence of Internal Friction on the Stability of High Speed Rotors With Anisotropic Supports

1969 ◽  
Vol 91 (4) ◽  
pp. 1105-1113 ◽  
Author(s):  
E. J. Gunter ◽  
P. R. Trumpler
Keyword(s):  
Internal Friction ◽  
High Speed ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Analog Computer ◽  
Three Dimensional Model ◽  
Stiffness Properties ◽  
Stiffness Characteristics ◽  
The Stability ◽  
Internal Rotor

This paper evaluates the stability of the single mass rotor with internal friction on damped, anisotropic supports. The paper shows under what conditions the rotor stability may be improved by an undamped support with anisotropic stiffness properties. A three dimensional model is presented to show the influence of rotor and support stiffness characteristics on stability. Curves are also presented on how support damping may also improve or even reduce rotor stability. An analog computer solution of the governing equations of motion is presented showing the shaft transient motion for various speed ranges, and also plots of the rotor steady state motion are given for various speeds up to and including the stability threshold. The analysis is used to explain many of the experimental observations of B. L. Newkirk concerning stability due to internal rotor friction.

Design and Co-Simulation Analysis of Flip Climbing Transmission System for Stair-Climbing Wheelchair

2014 ◽  
Vol 621 ◽  
pp. 372-377
Author(s):  
Zhan Li Wang ◽  
Yan Juan Hu ◽  
Yan Wei Chen ◽  
Hua Chao Guo
Keyword(s):  
Simulation Analysis ◽  
Gear Tooth ◽  
Three Dimensional ◽  
Planetary Gear ◽  
Transmission System ◽  
Structure Design ◽  
Stair Climbing ◽  
Three Dimensional Model ◽  
Space Limitation ◽  
Simulated Analysis

: In this paper, I designed a differential planetary gear for flip climbing transmission system which was applied to the star-climbing wheelchair. According to space limitation and the stair climbing per formance requirements, distributing the number of teeth for each gear under transmission ratio requirements. Furthermore, modifying tooth profile parameters on each gear for improving the quality of the transmission. Using SolidWorks software established t he three-dimensional model. Then impact and contact simulated analysis is studied based on the SolidWorks Motion Plugins to get transmission and meshing condition. At the same time, gave the SolidWorks Motion output data as a result of the input data to t h e SolidWorks Simulation. Through the simulation results validate the output center gear tooth can meet the carrying capacity requirements. On the other hand, it also provides theoretical basis for further improve the structure design.

Six-Axis Folding Frame Structure Design and Research

2015 ◽  
Vol 741 ◽  
pp. 159-162
Author(s):  
Fan Bo Meng ◽  
Hong Bin Liu
Keyword(s):  
Structural Design ◽  
Simulation Analysis ◽  
Structural Strength ◽  
Three Dimensional ◽  
Structure Design ◽  
Frame Structure ◽  
Three Dimensional Model ◽  
Physical Prototype ◽  
3D Software ◽  
Reasonable Use

For the shortcomings of existing multi-axis aircraft rack design a new folding mechanism of the machine arm, and then design a six-axis folding rack. By calculating the structural strength of the machine arm and apply engineering analysis software for the six-axis folding rack mechanics simulation analysis to verify its structural design is reasonable. Use 3D software to build a three-dimensional model of the six-axis folding rack, and use rapid prototyping technology, access to the kind of physical prototype six-axis folding rack, after the actual test, consistent with mission requirements.

Design and Dynamic Simulation for Hydraulic Support

2013 ◽  
Vol 456 ◽  
pp. 230-233
Author(s):  
Dong Min Li ◽  
Yong Hai Tan ◽  
Rui Yin Xu ◽  
Jian Jun Yuan ◽  
Bao Yin Li ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Three Dimensional ◽  
Structure Design ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Hydraulic Support ◽  
Simulation Data ◽  
Simulation Based ◽  
Screen Shot ◽  
Special Working

The whole structure of a new hydraulic support is designed according to the special working conditions, and the main parameters on its structure and dimension are calculated based on the whole structure and the corresponding formula about the structure design of hydraulic support. The entity of the new hydraulic support is modeled with Pro/E, and the whole assembling of hydraulic support is accomplished based on the former structure and dimension. Thus the dynamic simulation based on the entity model is done with Pro/E given the simulation data derived from the actual working status, and the screen shot of 3 key time nodes among the whole movement process is got, finally the simulation results prove that the design and three dimensional model are correct and available.

Structure Design and Analysis of Kinematics of a 6-DOF Upper-Limbed Rehabilitation Robot

2013 ◽  
Vol 433-435 ◽  
pp. 125-129
Author(s):  
Dian Feng Cao ◽  
Qi Zhi Yang ◽  
Jun Peng Song ◽  
Jin Hai Zhao
Keyword(s):  
Three Dimensional ◽  
Transformation Method ◽  
Structure Design ◽  
Rehabilitation Robot ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Theoretical Derivation ◽  
Kinematics Simulation ◽  
Movement Characteristics ◽  
Inverse Solutions

In order to solve the problems that the functions of exiting upper-limbed rehabilitation robot are single and the structure is complicated, a 6-DOF exoskeleton upper-limbed rehabilitation robot is put forward. The kinematics model of the rehabilitation robot is established and kinematics positive and inverse solutions are solved using D-H transformation method. Three dimensional model of the rehabilitation robot is created by Pro/E and imported into ADAMS/view for the kinematics simulation by Mechanism/Pro. The gotten simulation results of the simulation verify the correctness of theoretical derivation and prove the smooth movement Characteristics of the scheme.

Sign in / Sign up

Export Citation Format

Share Document