Finite Element Study of the Effect of Load Sequence on the Fretting Wear

Low Load ◽

Wear Modelling ◽

Load Sequence ◽

Contact Parameters

Abstract Understanding the effect of load sequence is important in the context of a blade-disc dovetail joint in an aero-engine and many other such applications where, the mating surfaces undergo fretting wear under variable slip amplitude loading conditions. In the present work, a two-dimensional finite element analysis is carried out for a cylinder-on-plate configuration. The cylinder is modeled as deformable whereas the plate is modelled as rigid. An incremental wear modelling algorithm is used to model the wear of cylindrical pad while the plate is assumed as un-worn. This simulates a practical scenario where, generally one of the mating surfaces is sufficiently hardened or an interfacial harder/sacrificial element is inserted to restrict the wear to only one of the surfaces. A Fortran-based ABAQUS® subroutine UMESHMOTION is used to simulate the wear profile for the cylinder. A constant extrapolation technique is used to simulate 18000 cycles of fretting. The finite element analysis results are validated with the analytical solutions and literature data. The fretting wear modelling is carried out for two different slip amplitudes viz., 25 μm and 150 μm, to simulate the low and high slip amplitude loading respectively. Two blocks of alternate low and high slip amplitudes are applied to understand the influence of load sequence. Important contact parameters viz., contact pressure, contact stresses and contact slip are extracted. A comparison is made between the low-high and high-low load sequence based on the contact tractions and worn out profiles.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

Tire Science and Technology ◽

10.2346/1.2768607 ◽

2007 ◽

Vol 35 (3) ◽

pp. 226-238 ◽

Cited By ~ 1

Author(s):

K. M. Jeong ◽

K. W. Kim ◽

H. G. Beom ◽

J. U. Park

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Element Model ◽

Radial Force ◽

Element Analysis ◽

Force Variation ◽

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

Finite Element Analysis of Thermal Stresses in Circumferential Cast Clasps of Removable Partial Dentures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.23.229 ◽

2007 ◽

Vol 23 ◽

pp. 229-232

Author(s):

Liliana Sandu ◽

Nicolae Faur ◽

Cristina Bortun ◽

Sorin Porojan

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Thermal Stresses ◽

Element Analysis ◽

3 Dimensional ◽

Thermal Changes ◽

Back Action ◽

Aggressive Effect

Several studies evaluated the removable partial dentures by the finite element analysis, but none of them evaluated thermal stresses. The purpose of the study was to explore the influence of thermal oral changes induced by hot/cold liquids and food on the circumferential cast clasps of removable partial dentures. A 3-dimensional finite element method was used to explore the temperature distribution, thermal stress and the influence of thermal changes on stresses and displacements of circumferential clasps during functions. Thermal variations induce stresses in dental clasps, high temperatures having a more aggressive effect than lower one. Cold liquids and food induce high stresses in the retentive clasp arms while hot ones in the occlusal rests of the clasps and for the back action clasp also in the minor connector. The study suggests the importance of consFigureidering thermal variations for stress analyses of the cast clasps.

THREE DIMENSIONAL FINITE ELEMENT SIMULATION OF THE FRETTING WEAR PROBLEMS

International Journal of Modern Physics B ◽

10.1142/s0217979206040544 ◽

2006 ◽

Vol 20 (25n27) ◽

pp. 3890-3895 ◽

Cited By ~ 2

Author(s):

CHOON YEOL LEE ◽

JOON WOO BAE ◽

BYUNG SUN CHOI ◽

YOUNG SUCK CHAI

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Fretting Wear ◽

Symmetric Model ◽

Two Dimensional ◽

Element Analysis ◽

Inconel 690 ◽

The structural integrity of steam generators in nuclear power plants is very much dependent upon the fretting wear characteristics of Inconel 690 U-tubes. In this study, a finite element analysis was used to investigate fretting wear on the secondary side of the steam generator, which arises from flow-induced vibrations (FIV) between the U-tubes and supports or foreign objects. Two-dimensional and three-dimensional finite element analyses were adopted to investigate the fretting wear problems. The purpose of the two-dimensional analysis, which simulated the contact between a punch and a plate, was to demonstrate the validity of using finite element analysis to analyze fretting wear problems. This was achieved by controlling the value of the wear constant and the number of cycles. The two-dimensional solutions obtained from this study were in good agreement with previous results reported by Strömberg. In the three-dimensional finite element analysis, a quarterly symmetric model was used to simulate tubes contacting at right angles. The results of the analyses showed donut-shaped wear along the contacting boundary, which is a typical feature of fretting wear.

Structural Optimization of Road Fully Enclosed Sound Barrier Based on Three-Dimensional Finite Element Analysis

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1210/1/012002 ◽

2021 ◽

Vol 1210 (1) ◽

pp. 012002

Author(s):

Yang jingqiang ◽

Din dewei ◽

Yang zhimian

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Element Model ◽

Element Analysis ◽

Sound Barrier ◽

Elevated Road ◽

Abstract With the help of the finite element analysis software ANSYS, this paper establishes a finite element model of a fully enclosed sound barrier of elevated road, calculating and analyzing the stress of supporting structure under different working conditions, checking the strength, stiffness and stability of the structure under the most unfavorable working condition. Finally we optimize the structure according to its characteristics.

Three-Dimensional Finite Element Analysis for the Stamping of a Motorcycle Oil Tank

Journal of Manufacturing Science and Engineering ◽

10.1115/1.2830218 ◽

1998 ◽

Vol 120 (4) ◽

pp. 770-773 ◽

Cited By ~ 1

Author(s):

Fuh-Kuo Chen ◽

Bai-Hong Chiang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Three Dimensional ◽

Die Design ◽

Element Analysis ◽

Blank Shape ◽

Oil Tank ◽

The three-dimensional finite element analysis was performed to determine an optimum die design and the corresponding sheet-blank shape for stamping a part of motorcycle oil tank. To save the computation time, an equivalent drawbead model was adopted to replace the actual drawbead shape in the finite element simulations. The forming limit diagram constructed from stretching tests was also used in conjunction with the finite element results to predict the occurrence of fracture. The optimum die design and the corresponding sheet-blank shape obtained from the finite element analysis was validated by the achievement of defect-free production panels. The advantage of using the finite element analysis for the stamping die design was thereby confirmed.

Material Models for the Finite Element Analysis of Materials Exhibiting a Pronounced Bauschinger Effect

Journal of Pressure Vessel Technology ◽

10.1115/1.2172967 ◽

2006 ◽

Vol 128 (2) ◽

pp. 190-195 ◽

Cited By ~ 9

Author(s):

Rolf R. de Swardt

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Strain Hardening ◽

Bauschinger Effect ◽

Element Analysis ◽

Material Models ◽

Reverse Loading ◽

Reverse Yielding

Realistic material models have been developed on the basis of the experimental investigation of reverse loading with actual Bauschinger effect and implemented into a two-dimensional finite element computer program. The developed program is capable of treating the elastoplastic deformation behavior of thick-walled cylinders during both loading and unloading phases. Strain hardening may occur during loading, and reverse yielding may occur during unloading at a yield strength significantly reduced due to the Bauschinger effect. Three different models for the reverse hardening are presented. Strain hardening during reverse yielding may have a different slope than for forward loading, and it may also be nonlinear. The intended application is for autofrettage analysis of thick-walled cylinders. Being a numerical solution, it will also be very useful for finite element analysis of residual stress experimental procedures and also in the determination of more accurate stress intensity factors for autofrettaged cylinders that had undergone reverse yielding due to the Bauschinger effect.

Three-Dimensional Finite Element Analysis of Antisymmetric Four-Point Shear Specimen

Volume 4: Materials Technology ◽

10.1115/omae2016-55111 ◽

2016 ◽

Author(s):

Mark Cohen ◽

Xin Wang

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

Crack Depth ◽

Finite Thickness ◽

Three Dimensional ◽

Specimen Thickness ◽

Element Analysis ◽

In this paper, the four-point shear (FPS) specimen is studied for different combinations of crack depth (a/W) and specimen thickness (t/W) to width ratios. Extensive 3D finite element analysis (FEA) has been carried out, and comprehensive solutions of fracture parameters produced. From the results of the finite element analysis, the size of the plastic zone is studied at various points through-thickness. Through these analyses, the effects of considering finite-thickness specimens are illustrated.

Study on Stress Concentration and Fatigue of Prosthetic Blood Vessels

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.647.413 ◽

2013 ◽

Vol 647 ◽

pp. 413-417

Author(s):

Guo Ping Chen ◽

Shui Wen Zhu

Keyword(s):

Mechanical Property ◽

Finite Element Analysis ◽

Finite Element ◽

Stress Concentration ◽

Blood Vessels ◽

Three Dimensional ◽

Element Analysis ◽

The purpose of this paper is to investigate the stress concentration and fatigue of the prosthetic blood vessels. A three-dimensional finite element analysis was performed with three loading. The good man fatigue thoery was introduced for the fatigue study. As the results, the stress concentration and fatigue mode can be determined. The results prove that the mechanical property of the prosthetic blood vessels can be smiulated through the finite element analysis.

Finite Element Analysis for the Influence of Nanoparticles on the Thermal Resudual Stressinfiber Reinforced Composite

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.302.212 ◽

2013 ◽

Vol 302 ◽

pp. 212-215

Author(s):

Xiao Long Wang ◽

Zhi Luo ◽

Hong Jie Jing ◽

Heng An Wu

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Performance ◽

Numerical Study ◽

Three Dimensional ◽

Element Analysis ◽

Thermal Expansion Coefficients ◽

In the present work, the finite element analysis was employed to study the distribution and level of thermal residual stress generated in matrix reinforced with SO2 nanoparticles. Using Cohesive Element as the bonding of the interface between fiber and matrix, three–dimensional finite element models of periodic cells were established. The results of the models with and without nanoparticles were compared. The residual thermal stressdue to the mismatch of the thermal expansion coefficients between matrix and fibers, especially theshear stress in the interface, decreased with nanoparticles, which could explain the reinforcing mechanism of nanoparticles. Our numerical study can be of great significance in designing new composites with high performance