“STRUCTURE ANALYSIS, CONTACT STRESS ANALYSIS AND FATIGUE LIFE ANALYSIS OF SPUR GEAR ASSEMBLY BY USING FEM”

2018 ◽  
Vol 4 (4) ◽  
pp. 13
Author(s):  
Anand Mohan Singh ◽  
Megha Bhawsar ◽  
Neeraj Kumar Nagayach
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Failure Analysis ◽  
Contact Stress ◽  
Spur Gear ◽  
Contact Analysis ◽  
Element Analysis ◽  
Life Analysis ◽  
Fatigue Life Analysis

In this present work a virtual environment has been created to investigate the failure analysis on spur gear assembly in which structural analysis, fatigue failure analysis and contact stress analysis have been performed using finite element method. For this work, a three dimensional cad model has been created and imported to ANSYS workbench for further finite element analysis. Various boundary conditions have been used to perform structural, fatigue failure assessment and contact analysis such as revolute joints is provided with Body Ground connection for 60 rpm for structure analysis, Augmented Lagrange method is set for contact analysis, for fatigue life analysis the fatigue strength factor is used as 0.85 for fully reverse loading and the life of shear stress in cycles and for the contact analysis linear and nonlinear contact are used for both source and target body. It has been observe that contact stress and bending stress not attain their maximum values at the same points, if the contact stress minimize in primary design stage then the failure of gear can minimized by analysis of the problem during the earlier stage of design. It can also be state that by using finite element analysis complex analysis like fatigue and contact analysis can be performed very accurately within a very short time and cost effectively rather than experimental analysis.

Predicting Reliability of Structural Systems Using Classification Method

2013 ◽  
Author(s):  
Recep M. Gorguluarslan ◽  
Seung-Kyum Choi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Probabilistic Neural Network ◽  
Engineering Problem ◽  
Support Vector ◽  
Structural Systems ◽  
Element Analysis ◽  
Life Analysis ◽  
Fatigue Life Analysis

This research examines classification approaches for estimating the reliability of structural systems. To validate the accuracy and efficiency of the classification methods, a practical engineering problem; namely, a spider assembly of a washing machine, has been considered. For the spider assembly, fatigue life test, finite element analysis, physical experimentation, and a classification processes are conducted in order to establish the analytical certification of its current design. Specifically, the finite element analysis and fatigue life analysis are performed and their results are validated compared to physical experimental results. The classification process is developed to estimate the probability of failure of the spider assembly in terms of stress and fatigue life. The relationship between the random quantities and structural responses of the spider assembly is established using probabilistic neural network and the support vector machine classifiers. The performance margin of the spider assembly is fully identified based on the estimated failure probability and structural analysis results from the fatigue life analysis and classifications.

scholarly journals Impact Characteristics and Fatigue Life Analysis of Multi-Wire Recoil Spring for Guns

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Zhifang Wei ◽  
Xiaolian Zhang ◽  
Yecang Hu ◽  
Yangyang Cheng
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Helical Spring ◽  
Element Analysis ◽  
Life Analysis ◽  
Fatigue Life Analysis ◽  
The Impact

Recoil spring is a key part in automatic or semi-automatic weapons re-entry mechanism. Because the stranded wire helical spring (SWHS) has longer fatigue life than an ordinary single-wire cylindrically helical spring, it is often used as a recoil spring in various weapons. Due to the lack of in-depth research on the dynamic characteristics of the current multi-wire recoil spring in recoil and re-entry processes, the fatigue life analysis of the current multi-wire recoil spring usually only considers uniform loading and does not consider dynamic impact loads, which cannot meet modern design requirements. Therefore, this paper proposes a research method for fatigue life prediction analysis of multi-wire recoil spring. Firstly, based on the secondary development of UG, a three-wire recoil spring parameterized model for a gun is established. Secondly, ABAQUS is used to carry out a finite element analysis of its dynamic response characteristics under impact, and experimental verification is performed. Then, based on the stress-time history curve of the dangerous position obtained by finite element analysis, the rain flow counting method is used to obtain the fatigue stress spectrum of recoil spring. Finally, according to the Miner fatigue cumulative damage theory, the fatigue life prediction of the recoil spring based on the S-N curve of the material is compared with experimental results. The research results show that the recoil spring has obvious transient characteristics during the impact of the bolt carrier. The impact velocity is far greater than the propagation speed of the stress wave in the recoil spring, which easily causes the spring coils to squeeze each other. The maximum stress occurs at the fixed end of the spring. And the mean fatigue curve (50% survival rate) is used to predict the life of the recoil spring. The calculation result is 8.6% different from the experiment value, which proves that the method has certain reliability.

Fatigue Life Prediction of Girth Gear-Pinion Assembly Used in Kilns by Finite Element Analysis

2013 ◽  
Vol 372 ◽  
pp. 292-296 ◽  
Author(s):  
K. Annamalai ◽  
S. Sathyanarayanan ◽  
C.D. Naiju ◽  
Mohammed Shejeer
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Life Expectancy ◽  
Element Analysis ◽  
Linear Elastic ◽  
Gear Design ◽  
Steel Material ◽  
Rainflow Cycle Counting ◽  
Fatigue Life Analysis

This study is focused on predicting the fatigue life expectancy of Girth gear-pinion assembly used in cement industries. Gear design and modeling was carried out using a CAD package and analysis was done using finite element analysis software, ANSYS. AISI 4135-low alloy steel material properties are considered and linear elastic finite element analysis and fatigue life analysis were carried out. The variable amplitude load is applied to simulate the real time loading of the gear-pinion assembly. Rainflow cycle counting algorithm and Minars linear damage rule is employed to predict the fatigue life. The critical stress and the corresponding deformation are discussed in the results. Finally the life expectancy of the girth gear and pinion assembly is estimated which would be useful for the periodical maintenance of the gear assembly.

Fatigue Life Analysis of Wire Rope Strands with Finite Element Method

2013 ◽  
Vol 572 ◽  
pp. 513-516 ◽  
Author(s):  
Ismail Gerdemeli ◽  
Serpil Kurt ◽  
Ali Semih Anil
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Helix Angle ◽  
Wire Rope ◽  
Element Analysis ◽  
Wire Ropes ◽  
Computer Environment ◽  
Fatigue Life Analysis ◽  
Force Range

In this study, fatigue life of axial loaded wire rope strands are investigated in computer environment. For this purpose generated models about finite element analysis of wire ropes, conducted researches and fatigue condition of wire ropes are investigated. The condition required in order not to contact outer wires with each other is expressed with the purpose of modeling simple strand and the generated model is confirmed by using defined geometrical values. 3D solid model of 1+6 simple strand used in finite element analysis is generated in CAD software SolidWorksTM. Finite element analysis of simple strand is done by FEA software ANSYSTM. Fatigue analyses are done by ANSYS/Workbench for experimental groups generated by using 3 different parameters which are strand length, helix angle and force range. Graphics, which show fatigue life variance of axial loaded 1+6 simple strand, are created by obtaining fatigue life distribution according to Goodman approach.

Lifting Platform Hinge Shaft Contact Finite Element Analysis

2014 ◽  
Vol 494-495 ◽  
pp. 273-276
Author(s):  
Yi Sun ◽  
Yuan Cai Liu ◽  
Bing Hua Xia
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Contact Stress ◽  
Contact Surface ◽  
Contact Analysis ◽  
Ansys Software ◽  
Element Analysis ◽  
Relationship Problems ◽  
Spring Element ◽  
Bearing Contact

The lifting platform connecting hinge shaft finite element analysis by ANSYS software, and the fork arm is connected to the hinge bearing contact surface using spring element, the spring element contact stress situation to determine the hinge bearing and internal and external fork arm, solves the contact with the fork arm of the hinge shaft stress relationship problems, finite element analysis. The model is more accurate. The analysis of ideas can be widely applied to the similar finite element contact analysis.

Utilizing Finite Element Analysis to Accurately Predict Fatigue Life of Autofrettaged Ultra High Pressure Components

2003 ◽  
Author(s):  
Weishun W. Ni ◽  
Christopher L. Tucker ◽  
Steve D. Able ◽  
Michael D. Mann
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
High Pressure ◽  
Fatigue Life ◽  
Computer Aided Design ◽  
Three Dimensional ◽  
Normal Operation ◽  
Critical Parameters ◽  
Element Analysis ◽  
Fatigue Life Analysis

Computer Aided Design and Finite Element Analysis packages that have been developed are capable of providing a relatively accurate fatigue life prediction. These software packages have made nonlinear analysis more reliable in forecasting a component’s fatigue life. A safe-life (in which the components are safe from failure during the estimated service life) can be predicted during the design process. The autofrettage technique has long been applied in high-pressure industries in order to extend the components’ life. The critical parameters that must be understood during a fatigue life analysis are material properties, including cyclic loading properties and stress excursion during the service cycle. In this paper, a three-dimensional finite element analysis of an autofrettaged manifold is presented. This assessment investigated an ANSI 316 stainless steel Tee-fitting, which was exposed to different cyclical loading conditions (two autofrettage conditions at a normal operation level). This was done in order to compare finite element analysis results to actual laboratory experimental results.

Contact stress and transmission errors under load of a modified curvilinear gear set based on finite element analysis

2014 ◽  
Vol 229 (2) ◽  
pp. 191-204 ◽  
Author(s):  
Yi-Cheng Chen ◽  
Chien-Cheng Lo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Model ◽  
Contact Stress ◽  
Element Model ◽  
Contact Analysis ◽  
Tooth Contact Analysis ◽  
Element Analysis ◽  
Transmission Errors ◽  
Mesh Density

This study conducted a loaded tooth contact analysis of a modified curvilinear gear set with localized bearing contact based on finite element analysis. The contact stress and transmission errors under load were examined. First, a mesh generation program was developed according to the mathematical model of a curvilinear gear generated using a male fly cutter. A finite element model containing one contacting tooth pair was built, and the mesh density at the contact-sensitive area was adjusted to attain a reasonable finite element model for estimating the contact pressure. Adequate mesh density at the possible contact region predicted by tooth contact analysis was defined based on the theoretical Hertzian contact stress and the calculated contact ellipse. A finite element model containing five tooth pairs was developed and applied to examine the contact stress and transmission errors under load of the modified curvilinear gear set. Finally, numerical examples were provided to demonstrate the contact stress and transmission errors under load for various design parameters and loads.

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