Flash Temperature Analysis Method for Polymer Gears With Consideration of Deviations in Meshing Kinematics

2019 ◽  
Author(s):  
Borut Cerne ◽  
Damijan Zorko ◽  
Joze Duhovnik ◽  
Joze Tavcar ◽  
Roman Zavbi
Keyword(s):  
Temperature Rise ◽  
Mechanical Response ◽  
Computational Method ◽  
Analysis Method ◽  
Flash Temperature ◽  
Element Analysis ◽  
Gear Teeth ◽  
Instantaneous Temperature ◽  
Computational Resources ◽  
Tooth Pair

Abstract The presented work describes a computational method for carrying out a detailed and thorough examination of the flash temperature rise (i.e. the local ‘instantaneous’ temperature increase on a contact interface, due to frictional effects) present on the tooth flanks of a polymer gear pair, composed of a combination of POM and PA66 thermoplastics, during a given meshing cycle. The method involves a decoupled sequential procedure, where first the mechanical response of the gear teeth during a whole meshing cycle is analyzed using finite element analysis and, subsequently, a semi-analytical thermal analysis procedure is employed, with which the local flash temperature rise under a given tooth-pair contact can be evaluated. The method provides an accurate reproduction of the actual thermo-mechanical processes taking place at the gear teeth contact interfaces and allows for an investigation of the influence of deviations in the gear flank geometry and gear tolerances, while retaining a manageable enough form for application with moderate computational resources.

Study on Stress Strain in UG-Based Fatigue Analysis of Piston Pin

2013 ◽  
Vol 676 ◽  
pp. 145-148
Author(s):  
Hong Ying Wang ◽  
Wei Guo
Keyword(s):  
Boundary Condition ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Strain Analysis ◽  
Fatigue Analysis ◽  
Computational Method ◽  
Analysis Method ◽  
Stress Strain ◽  
Element Analysis ◽  
Conventional Algorithm

Carried on finite element analysis using the UG software to finally carry on the fatigue life’s computational method to carry on the exploration and the research. when carrying on the finite element stress strain analysis to the piston pin, used the different analysis method, because the piston pin’s quality is very slightly oppositeing to the piston quality, produces the force of inertia is very small, the counter stress computed result is not very obvious, therefore to piston pin finite element analysis we uses conventional algorithm that infliction boundary condition.

scholarly journals Semi-analytical flash temperature model for thermoplastic polymer spur gears with consideration of linear thermo-mechanical material characteristics

2019 ◽  
Vol 6 (4) ◽  
pp. 617-628 ◽  
Author(s):  
Borut Černe ◽  
Jože Duhovnik ◽  
Jože Tavčar
Keyword(s):  
Temperature Increase ◽  
Heat Dissipation ◽  
Evaluation Method ◽  
Mechanical Response ◽  
Sliding Friction ◽  
Real Life ◽  
Temperature Model ◽  
Flash Temperature ◽  
Element Analysis ◽  
Nominal Temperature

Abstract The temperature increase that occurs during running of a polymer gear pair can be divided into two components: the nominal and flash temperatures. The latter denotes the short-term temperature increase that takes place during a gear meshing cycle. A thorough analysis of the flash temperature yields an insight into the heat dissipation process, which also determines the nominal temperature increase. We focus here on the flash component using numerical and analytical computation tools, with which we can obtain realistic predictions of the temperature increase during a gear meshing cycle. The analysis is performed using a decoupled procedure that involves a mechanical finite element analysis, followed by a semi-analytical temperature evaluation method based on the computed mechanical response of the system. With it, we obtain an improved flash temperature model that offers an accurate representation of the real life thermo-mechanical processes taking place at the gear teeth contact interfaces. Highlights Sliding friction during polymer gear meshing generates dominant part of heat losses. The developed flash temperature model is based on numerical and analytical tools. Meshing kinematics influence considerably the frictional losses and temperature rise. Flash temperature model applicable to any type of spur gear geometry. The model provides necessary groundwork for long term nominal temperature analysis.

Pseudo-Interference Stiffness Estimation in Gear Teeth Contact

1996 ◽  
Author(s):  
Geunho Lee ◽  
Kazem Kazarounian ◽  
Herbert A. Koenig
Keyword(s):  
Exact Analytical Solution ◽  
Contact Region ◽  
Accurate Estimation ◽  
Analysis Method ◽  
Mesh Stiffness ◽  
Element Analysis ◽  
Gear Teeth ◽  
Finite Element Analysis Method ◽  
The Finite Element Analysis ◽  
Stiffness Characteristics

Abstract One of the important factors in gear dynamic analysis is accurate estimation of the mesh stiffness. To accurately model the mesh stiffness characteristics, the Pseudo-Interference Stiffness Estimation (PISE) method is proposed. PISE draws upon the finite element analysis method. It also analyzes the non-linear, geometric based characteristics of the local contact region. Consequently, PISE is used to model the elastic deformation at the mesh regions and estimate the corresponding stiffnesses in the elastic region. In this paper, as an example, PISE is applied to the two cylinders’ contact problem. Thus the PISE solution is compared with exact analytical solution which is readily available in literature. Subsequently, PISE is used to model the contact region and estimate the mesh stiffness of a gear system.

Research of Engine Piston Pin Fatigue Analysis Based on UG

2011 ◽  
Vol 383-390 ◽  
pp. 7312-7315
Author(s):  
Hong Pu Liu ◽  
Hong Ying Wang
Keyword(s):  
Boundary Condition ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Static Analysis ◽  
Fatigue Analysis ◽  
Computational Method ◽  
Analysis Method ◽  
Element Analysis ◽  
Engine Piston ◽  
Conventional Algorithm

Carried on finite element analysis using the UG software to finally carry on the fatigue life’s computational method to carry on the exploration and the research. when carrying on the finite element static analysis to the piston pin, used the different analysis method, because the piston pin’s quality is very slightly oppositeing to the piston quality, produces the force of inertia is very small, the counter stress computed result is not very obvious, therefore to piston pin finite element analysis we uses conventional algorithm that infliction boundary condition.

Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem

2012 ◽  
Vol 40 (1) ◽  
pp. 25-41 ◽  
Author(s):  
H. M. R. Aboutorabi ◽  
L. Kung
Keyword(s):  
Performance Improvement ◽  
Acoustic Analysis ◽  
Simulation Analysis ◽  
Analysis Method ◽  
Vehicle Manufacturer ◽  
Element Analysis ◽  
Equipment Manufacturer ◽  
Tire Noise ◽  
Fea Modeling ◽  
Testing Instruments

Abstract REFERENCE: H. M. R. Aboutorabi and L. Kung, “Application of Coupled Structural Acoustic Analysis and Sensitivity Calculations to a Tire Noise Problem,” Tire Science and Technology, TSTCA, Vol. 40, No. 1, January – March 2012, pp. 25–41. ABSTRACT: Tire qualification for an original equipment (OE) program consists of several rounds of submissions by the tire manufacturer for evaluation by the vehicle manufacturer. Tires are evaluated both subjectively, where the tire performance is rated by an expert driver, and objectively, where sensors and testing instruments are used to measure the tire performance. At the end of each round of testing the evaluation results are shared and requirements for performance improvement for the next round are communicated with the tire manufacturer. As building and testing is both expensive and time consuming predictive modeling and simulation analysis that can be applied to the performance of the tire is of great interest and value. This paper presents an application of finite element analysis (FEA) modeling along with experimental verification to solve tire noise objections at certain frequencies raised by an original equipment manufacturer (OEM) account. Coupled structural-acoustic analysis method was used to find modal characteristics of the tire at the objectionable frequencies. Sensitivity calculations were then carried out to evaluate the strength of contribution from each tire component to the identified modes. Based on these findings changes to the construction were proposed and implemented that addressed the noise issue.

Use of the Finite Element Analysis Method in Pedodontics

2018 ◽  
Vol 55 (4) ◽  
pp. 666-675
Author(s):  
Mihaela Tanase ◽  
Dan Florin Nitoi ◽  
Marina Melescanu Imre ◽  
Dorin Ionescu ◽  
Laura Raducu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structural Model ◽  
Analysis Method ◽  
Ansys Software ◽  
Concentrated Force ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
The Finite Element Analysis ◽  
Solid Type

The purpose of this study was to determinate , using the Finite Element Analysis Method, the mechanical stress in a solid body , temporary molar restored with the self-curing GC material. The originality of our study consisted in using an accurate structural model and applying a concentrated force and a uniformly distributed pressure. Molar structure was meshed in a Solid Type 45 and the output data were obtained using the ANSYS software. The practical predictions can be made about the behavior of different restorations materials.

scholarly journals Discrete element analysis of the punching behaviour of a secured drapery system: from laboratory characterization to idealized in situ conditions

2021 ◽  
Author(s):  
Antonio Pol ◽  
Fabio Gabrieli ◽  
Lorenzo Brezzi
Keyword(s):  
Mechanical Response ◽  
Steel Wire ◽  
Discrete Element ◽  
Wire Mesh ◽  
Steel Plates ◽  
Loading Conditions ◽  
Element Analysis ◽  
In Situ Conditions ◽  
Wire Meshes

AbstractIn this work, the mechanical response of a steel wire mesh panel against a punching load is studied starting from laboratory test conditions and extending the results to field applications. Wire meshes anchored with bolts and steel plates are extensively used in rockfall protection and slope stabilization. Their performances are evaluated through laboratory tests, but the mechanical constraints, the geometry and the loading conditions may strongly differ from the in situ conditions leading to incorrect estimations of the strength of the mesh. In this work, the discrete element method is used to simulate a wire mesh. After validation of the numerical mesh model against experimental data, the punching behaviour of an anchored mesh panel is investigated in order to obtain a more realistic characterization of the mesh mechanical response in field conditions. The dimension of the punching element, its position, the anchor plate size and the anchor spacing are varied, providing analytical relationships able to predict the panel response in different loading conditions. Furthermore, the mesh panel aspect ratio is analysed showing the existence of an optimal value. The results of this study can provide useful information to practitioners for designing secured drapery systems, as well as for the assessment of their safety conditions.

Scanner influence on the mechanical response of QCT-based finite element analysis of long bones

2019 ◽  
Vol 86 ◽  
pp. 149-159 ◽  
Author(s):  
Yekutiel Katz ◽  
Gal Dahan ◽  
Jacob Sosna ◽  
Ilan Shelef ◽  
Evgenia Cherniavsky ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Mechanical Response ◽  
Long Bones ◽  
Element Analysis
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