Finite element analysis of fatigue life for deep groove ball bearing

Purpose This paper aims to present the fatigue life behaviour of upper arm suspension. The main objectives are to predict the fatigue life of the component and to identify the critical location. In this analysis, three aluminium alloys were used for the suspension, and their fatigue life was compared to select the suitable material for the suspension arm. Design/methodology/approach CAD model was prepared using Solid Works software, and finite element analysis was done using ANSYS 14.0 software by importing the Parasolid file to ANSYS. The model is subjected to loading and boundary conditions; the authors consider a vertical force with constant amplitude applied at the bushing that connected to the tire, the others two bushing that connected to the body of the car are constraint. Tetrahedral elements given enhanced results as compared to other types of elements; therefore, the elements (TET 10) are used. The maximum principal stress was considered in the linear static analysis, and fatigue analysis was done using strain life approach. Findings Life and damage are evaluated and the critical location was considered at node 63,754. From the fatigue analysis, aluminium alloys 7175-T73 (Al 90%-Zn 5.6%-Mg 2.5% -… …) and 2014-T6 (Al 93.5%-Cu 4.4%-Mg 0.5%… …) present a similar behaviour as compared to 6061-T6 (Al 97.9%-Mg 1.0%-Si 0.6%… … .); in this case of study, these lather are considered to be the materials of choice to manufacture the suspension arms; but 7175-T73 aluminium alloys remain the material with a better resistance to fatigue. Originality/value By the finite element analysis method and assistance of ANSYS software, it is able to analyse the different car components from varied aspects such as fatigue, and consequently save time and cost. For further research, the experimental works under controlled laboratory conditions should be done to determine the validation of the result from the software analysis.

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Finite Element Analysis of the Rolling Contact Fatigue Life of Railcar Wheels

Materials Science Forum ◽

10.4028/www.scientific.net/msf.575-578.1461 ◽

2008 ◽

Vol 575-578 ◽

pp. 1461-1466

Author(s):

Byeong Choon Goo ◽

Jung Won Seo

Keyword(s):

Heat Treatment ◽

Residual Stress ◽

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Contact Fatigue ◽

Rolling Contact ◽

Element Analysis ◽

Railway Vehicles ◽

Contact Fatigue Life

Railcar wheels and axles belong to the most critical components in railway vehicles. The service conditions of railway vehicles have been more severe in recent years due to speed-up. Therefore, a more precise evaluation of railcar wheel life and safety has been requested. Wheel/rail contact fatigue and thermal cracks due to braking are two major mechanisms of the railcar wheel failure. One of the main sources influencing on the contact zone failure is residual stress. The residual stress in wheels formed during heat treatment in manufacturing changes in the process of braking. Thus the fatigue life of railcar wheels should be estimated by considering both thermal stress and rolling contact. Also, the effect of residual stress variation due to manufacturing process and braking process should be included in simulating contact fatigue behavior. In this paper, an evaluation procedure for the contact fatigue life of railcar wheels considering the effects of residual stresses due to heat treatment, braking and repeated contact load is proposed. And the cyclic stressstrain history for fatigue analysis is simulated by finite element analysis for the moving contact load.

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TTK Chitra tilting disc heart valve model TC2: An assessment of fatigue life and durability

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1177/0954411917703676 ◽

2017 ◽

Vol 231 (8) ◽

pp. 758-765 ◽

Cited By ~ 1

Author(s):

NN Subhash ◽

Adathala Rajeev ◽

Sreedharan Sujesh ◽

CV Muraleedharan

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Heart Valve ◽

Life Prediction ◽

Heart Valves ◽

Failure Modes ◽

Fatigue Life Prediction ◽

Element Analysis ◽

Valve Model

Average age group of heart valve replacement in India and most of the Third World countries is below 30 years. Hence, the valve for such patients need to be designed to have a service life of 50 years or more which corresponds to 2000 million cycles of operation. The purpose of this study was to assess the structural performance of the TTK Chitra tilting disc heart valve model TC2 and thereby address its durability. The TC2 model tilting disc heart valves were assessed to evaluate the risks connected with potential structural failure modes. To be more specific, the studies covered the finite element analysis–based fatigue life prediction and accelerated durability testing of the tilting disc heart valves for nine different valve sizes. First, finite element analysis–based fatigue life prediction showed that all nine valve sizes were in the infinite life region. Second, accelerated durability test showed that all nine valve sizes remained functional for 400 million cycles under experimental conditions. The study ensures the continued function of TC2 model tilting disc heart valves over duration in excess of 50 years. The results imply that the TC2 model valve designs are structurally safe, reliable and durable.

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Finite Element Analysis Model of Corrosion Fatigue for TIG Welding Workpiece

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.707.154 ◽

2016 ◽

Vol 707 ◽

pp. 154-158

Author(s):

Somsak Limwongsakorn ◽

Wasawat Nakkiew ◽

Adirek Baisukhan

Keyword(s):

Residual Stress ◽

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Corrosion Fatigue ◽

Welding Process ◽

Simulation Software ◽

Tig Welding ◽

Element Analysis ◽

Fea Model

The proposed finite element analysis (FEA) model was constructed using FEA simulation software, ANSYS program, for determining effects of corrosion fatigue (CF) from TIG welding process on AISI 304 stainless steel workpiece. The FEA model of TIG welding process was developed from Goldak's double ellipsoid moving heat source. In this paper, the residual stress results obtained from the FEA model were consistent with results from the X-ray diffraction (XRD) method. The residual stress was further used as an input in the next step of corrosion fatigue analysis. The predictive CF life result obtained from the FEA CF model were consistent with the value obtained from stress-life curve (S-N curve) from the reference literaturature. Therefore, the proposed FEA of CF model was then used for predicting the corrosion fatigue life on TIG welding workpiece, the results from the model showed the corrosion fatigue life of 1,794 cycles with testing condition of the frequency ( f ) = 0.1 Hz and the equivalent load of 67.5 kN (equal to 150 MPa) with R = 0.25.

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Prediction of thermo-mechanical fatigue life of IN738 LC using the finite element analysis

International Journal of Precision Engineering and Manufacturing ◽

10.1007/s12541-014-0526-3 ◽

2014 ◽

Vol 15 (8) ◽

pp. 1733-1737 ◽

Cited By ~ 3

Author(s):

Jeong-Min Lee ◽

Chang-Sung Seok ◽

Dongkeun Lee ◽

Yongseok Kim ◽

Junghan Yun ◽

...

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Element Analysis ◽

Mechanical Fatigue ◽

The Finite Element Analysis

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Finite element analysis of freight car structures for fatigue life prediction

Proceedings of the 2006 IEEE/ASME Joint Rail Conference ◽

10.1109/rrcon.2006.215286 ◽

2006 ◽

Author(s):

S. Richmond

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Life Prediction ◽

Fatigue Life Prediction ◽

Element Analysis ◽

Freight Car

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Finite Element Analysis of the Effect of Twist on Chain Fatigue Performance

Volume 3: Structures, Safety, and Reliability ◽

10.1115/omae2019-95276 ◽

2019 ◽

Author(s):

Justin Jones

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Stress State ◽

Element Analysis ◽

Contact Patch ◽

Multiaxial Stress State ◽

Twisted State ◽

Residual Stress State ◽

Proof Testing

Abstract Mooring chains may be installed with twist or become twisted during service. This paper describes an investigation of the effect of a range of twist angles on the fatigue life of studless chain through the use of detailed finite element analysis. The analysis includes the local contact patch deformation and residual stress state that results from plasticity during the proof testing of the chain. The effect of high in-service tension resulting from storms that produces additional plasticity when the chain is loaded in the twisted state is also included. The change in fatigue life at the crown, inner bend and around the contact patch are assessed. Local to the contact patch the fatigue life calculation includes an assessment of the multiaxial stress state. For small angles of twist the calculated fatigue life at the crown and around the contact increases and that at the inner bend sees a marginal reduction. At twist angles above 12 to 14 degrees per link the calculated inner bend and contact patch fatigue lives reduce markedly with increasing twist, but the crown fatigue life continues to increase.

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A Review of Optimising the Design of a New Coke Drum Skirt

Volume 3: Design and Analysis ◽

10.1115/pvp2019-93135 ◽

2019 ◽

Author(s):

Alex Berry ◽

Warren Brown ◽

Antonio Seijas ◽

Sarah Cook

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Fatigue Life ◽

Literature Review ◽

Thermal Stresses ◽

Fatigue Cracking ◽

Element Analysis ◽

Long Life ◽

Welded Connection

Abstract Coke drums are subjected to severe thermal cycling with the skirt to shell connection weld being vulnerable to fatigue cracking. It is essential this connection is well designed to ensure a long life before repairs are inevitably required. Much has been written on coke drum skirt design with the aim of reducing the thermal stresses and strains encountered at the skirt connection weld, some designs have removed the weld completely allowing the drum to sit in an “egg-in-cup” arrangement. This paper includes a short literature review discussing Coke drum skirt designs and explains skirt behaviour during the drum cycle that results in eventual skirt cracking. A case study is reviewed in detail for a new pair of coke drums, where the predicted fatigue life of the chosen welded connection is assessed using axisymmetric, quarter symmetry and half symmetry finite element analysis supported by thermocouple data. The optimised design focuses on a conventional tangential design where the effects of the essential variables such as skirt thickness, skirt connection location, skirt-to head-gap and slot design (length, location & spacing) have been modelled and optimised to obtain a skirt design that produces the longest fatigue life for the intended duty cycle. Coke drum skirts must be installed onto the shell to exacting tolerances during manufacture to ensure concentricity and minimal gap between the skirt and shell. A brief overview of how this is achieved will be presented.

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