Fatigue Failure Behaviour Study of Automotive Lower Suspension Arm

2011 ◽  
Vol 462-463 ◽  
pp. 796-800 ◽  
Author(s):  
Nawar A. Kadhim ◽  
Shahrum Abdullah ◽  
Ahmad Kamal Ariffin ◽  
S.M. Beden
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Numerical Models ◽  
Good Alternative ◽  
Analysis Tool ◽  
Element Analysis ◽  
Finite Element Software ◽  
Life Model ◽  
Experimental Process ◽  
Behaviour Study

Fatigue life of automotive lower suspension arm has been studied under variable amplitude loadings. In simulation, the geometry of a sedan car lower suspension arm has been used. To obtain the material monotonic properties, tensile test has been carried out and to specify the material mechanical properties of the used material, a fatigue test under constant amplitude loading has been carried out using the ASTM standard specimens. Then, the results used in the finite element software to predict fatigue life has been evaluated later to show the accuracy and efficiency of the numerical models which they are appreciated. The finite element analysis tool is therefore proved to be a good alternative prior to the further experimental process. The predicted fatigue life from the simulation showed that Smith-Watson-Topper model provides longer life than Morrow and Coffin-Manson models. This is due to the different consideration for each strain-life model during life calculations.

Approximate Solution of the Structural Problems Using Probabilistic Transformation

2010 ◽  
Vol 446 ◽  
pp. 91-99 ◽  
Author(s):  
S. Ouhimmou ◽  
A. El Hami ◽  
Rachid Ellaia ◽  
M. Tkiouat
Keyword(s):  
Finite Element ◽  
Numerical Models ◽  
Analytical Form ◽  
Transformation Method ◽  
Element Analysis ◽  
Finite Element Software ◽  
Structural Problems ◽  
Input And Output ◽  
The Finite Element Analysis ◽  
Probability Density Function Pdf

The aim of this paper is to present a new methodology for the evaluation of the statistical proprieties of the response of structures, based on The Finite Element Analysis (FEA) coupled with the Probabilistic Transformation Method (PTM). Uncertainty modelling with random variables motivates the adoption of advanced PTM for reliability analysis to solve problems of mechanical systems. The PTM is readily applicable in the case where the expression between input and output of structures are available in explicit analytical form. However, the situation is much more involved when it is necessary to perform the evaluation of implicit expression between input and output of structures through numerical models. For this we propose technique that combines the FEA software, and the PTM program to evaluate the Probability Density Function (PDF) of the response where the expression between input and output of structures is implicit. This technique is based on the numerical simulations of the FEA and the PTM by making an interface between Finite Element software and Matlab. Some problems of structures are treated in order to demonstrate the applicability of the proposed technique.

Contact Stress Analysis of Hard Coating Rolling Bearing

2014 ◽  
Vol 644-650 ◽  
pp. 90-94
Author(s):  
Yong Guo
Keyword(s):  
Finite Element ◽  
Contact Stress ◽  
Large Scale ◽  
Roller Bearing ◽  
Analysis Tool ◽  
Element Analysis ◽  
Finite Element Software ◽  
Cylindrical Roller Bearing ◽  
Cylindrical Roller ◽  
The Ideal

Take large-scale general finite element software ANSYS as the analysis tool and the cylindrical roller bearing as the research object, we establish the ideal contact numerical model of roller and analyze the Hertz contact stress. That calculation results of the ideal model are correspond to that of the finite element verifies the correctness of the finite element analysis method. In this paper, we establish the model of cylindrical roller bearing with coating, studying the distribution of contact stress in coatings with different thickness and analyzing the effect of coatings.

Strain-Based Fatigue Methods Using Modern Finite Element Analysis for the Assessment of Pressure Vessels Equivalent to the ASME III Code

2012 ◽  
Author(s):  
Lindsay Rawson ◽  
David Rice
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Pressure Vessels ◽  
Post Processing ◽  
Element Analysis ◽  
Computing Power ◽  
Fatigue Assessment ◽  
Software Applications ◽  
Finite Element Software ◽  
Practical Implications

The use of ASME III Design-By-Analysis assessment methodologies pre-dates the routine use of finite element software which can make the assessment of complex 3D geometries difficult. Recent progress in computing power and software have led to the increased possibility to utilise these developments and undertake ASME III type assessments on 3D components in more efficient and less labour intensive ways. The use of finite element software and post-processing codes is now widespread and full procedures for direct shakedown analysis and whole component fatigue assessment using software applications are becoming more readily available. Utilisation of these procedures can lead to a more robust assessment in a reduced analysis time therefore leading to reduced assessment costs. This paper focuses on the use of strain-based fatigue post-processing software to predict the fatigue life of a component. Strain-based fatigue life prediction provides a direct assessment of plasticity in the component which will lead to less conservative assessment and a less pessimistic fatigue life. Utilising this software also means a fatigue analysis of the whole model can be undertaken potentially reducing the subjectivity of any results obtained. This paper will discuss how strain-based fatigue methods can be applied to results from finite element models and how they compare to fatigue life calculations using traditional methods. Some of the practical implications of undertaking a fatigue assessment using these methods such as cycle counting for multiple transient histories are also discussed. An example based upon a typical reactor plant pressure vessel geometry using these methods is presented in this paper.

Analysis of Pipe-Soil Interaction for a Miniature Pipejacking

2006 ◽  
Vol 22 (3) ◽  
pp. 213-220 ◽  
Author(s):  
K. J. Shou ◽  
F. W. Chang
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Physical Modeling ◽  
Driving Force ◽  
Numerical Models ◽  
Surface Subsidence ◽  
Finite Element Software

AbstractIn this study, physical and numerical models were used to analyze pipe-soil interaction during pipejacking work. After calibrating with the physical modeling results, the finite element software ABAQUS [1] was used to study the pipejacking related behavior, such as surface subsidence, failure mechanism, pipe-soil interaction, etc. The results show that the driving force in the tunnelling face is very important and critical for pipejacking. Surface subsidence is mainly due to the lack of driving force, however, excessive driving force could cause the unfavorable surface heaving problem. It also suggests that the depth of the pipe is critical to determine a proper driving force to stabilize the tunnelling face.

A Study on Fatigue Life Evaluation of Pressure Vessel Made of ASME SA240-316L Material Using Numerical Analysis

2019 ◽  
Vol 893 ◽  
pp. 1-5 ◽  
Author(s):  
Eui Soo Kim
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Pressure Vessel ◽  
Life Prediction ◽  
Pressure Vessels ◽  
Physical Damage ◽  
Element Analysis ◽  
Internal Damage ◽  
Life Evaluation ◽  
Fatigue Life Evaluation

Pressure vessels are subjected to repeated loads during use and charging, which can causefine physical damage even in the elastic region. If the load is repeated under stress conditions belowthe yield strength, internal damage accumulates. Fatigue life evaluation of the structure of thepressure vessel using finite element analysis (FEA) is used to evaluate the life cycle of the structuraldesign based on finite element method (FEM) technology. This technique is more advanced thanfatigue life prediction that uses relational equations. This study describes fatigue analysis to predictthe fatigue life of a pressure vessel using stress data obtained from FEA. The life prediction results areuseful for improving the component design at a very early development stage. The fatigue life of thepressure vessel is calculated for each node on the model, and cumulative damage theory is used tocalculate the fatigue life. Then, the fatigue life is calculated from this information using the FEanalysis software ADINA and the fatigue life calculation program WINLIFE.

Finite Element Analysis of Main Stand of Ф140 Pipe Rolling Mill and Split Casting

2013 ◽  
Vol 690-693 ◽  
pp. 2327-2330
Author(s):  
Ming Bo Han ◽  
Li Fei Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rolling Mill ◽  
Analysis Model ◽  
Element Analysis ◽  
Pipe Rolling ◽  
Full Load ◽  
Finite Element Software ◽  
Theoretical Position ◽  
Technical Requirements

By using finite element software, the paper establishes the main stand analysis model of the Ф140 pipe rolling mill and provides the model analysis of main stand in cases of full load. Verify the design of main stand fully comply with the technical requirements .In this paper, it provides the theoretical position of split casting and welding method using electric slag welding.

scholarly journals Prediction of Thermal Fatigue Life of Lead-Free BGA Solder Joints by Finite Element Analysis

2001 ◽  
Vol 42 (5) ◽  
pp. 809-813 ◽  
Author(s):  
Young-Eui Shin ◽  
Kyung-Woo Lee ◽  
Kyong-Ho Chang ◽  
Seung-Boo Jung ◽  
Jae Pil Jung
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fatigue Life ◽  
Thermal Fatigue ◽  
Solder Joints ◽  
Lead Free ◽  
Element Analysis ◽  
Thermal Fatigue Life

Stress and Fatigue Life Modeling of Cannon Breech Closures Including Effects of Material Strength and Residual Stress

2000 ◽  
Vol 123 (1) ◽  
pp. 150-154
Author(s):  
John H. Underwood ◽  
Michael J. Glennon
Keyword(s):  
Residual Stress ◽  
Finite Element ◽  
Fatigue Life ◽  
Yield Strength ◽  
Residual Stresses ◽  
Solid Mechanics ◽  
Element Model ◽  
Pressure Vessels ◽  
Material Strength ◽  
Element Analysis

Laboratory fatigue life results are summarized from several test series of high-strength steel cannon breech closure assemblies pressurized by rapid application of hydraulic oil. The tests were performed to determine safe fatigue lives of high-pressure components at the breech end of the cannon and breech assembly. Careful reanalysis of the fatigue life tests provides data for stress and fatigue life models for breech components, over the following ranges of key parameters: 380–745 MPa cyclic internal pressure; 100–160 mm bore diameter cannon pressure vessels; 1040–1170 MPa yield strength A723 steel; no residual stress, shot peen residual stress, overload residual stress. Modeling of applied and residual stresses at the location of the fatigue failure site is performed by elastic-plastic finite element analysis using ABAQUS and by solid mechanics analysis. Shot peen and overload residual stresses are modeled by superposing typical or calculated residual stress distributions on the applied stresses. Overload residual stresses are obtained directly from the finite element model of the breech, with the breech overload applied to the model in the same way as with actual components. Modeling of the fatigue life of the components is based on the fatigue intensity factor concept of Underwood and Parker, a fracture mechanics description of life that accounts for residual stresses, material yield strength and initial defect size. The fatigue life model describes six test conditions in a stress versus life plot with an R2 correlation of 0.94, and shows significantly lower correlation when known variations in yield strength, stress concentration factor, or residual stress are not included in the model input, thus demonstrating the model sensitivity to these variables.

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