Fretting Wear Simulation of Press-Fitted Shaft with Finite Element Analysis and Influence Function Method

2008 ◽  
Vol 32 (1) ◽  
pp. 54-62 ◽  
Author(s):  
Dong-Hyong Lee ◽  
Seok-Jin Kwon ◽  
Jae-Boong Choi ◽  
Young-Jin Kim
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Influence Function ◽  
Function Method ◽  
Fretting Wear ◽  
Wear Simulation ◽  
Element Analysis ◽  
Influence Function Method

Estimation of SCC Crack Growth Behavior Under Weld Residual Stress in the Bottom of a Reactor Pressure Vessel by Finite Element Analysis

2012 ◽  
Author(s):  
Fuminori Iwamatsu ◽  
Katsumasa Miyazaki ◽  
Masahito Mochizuki
Keyword(s):  
Residual Stress ◽  
Finite Element Analysis ◽  
Crack Growth ◽  
Influence Function ◽  
Function Method ◽  
Growth Behavior ◽  
Crack Growth Behavior ◽  
Element Analysis ◽  
Influence Function Method ◽  
Weld Residual Stress

Crack growth behavior intended for stress corrosion cracking under residual stress was estimated by repeatedly calculated 3-dimensional finite element analysis. The analytical estimation enables consideration of complicated stress distributions, such as weld residual stress, and expression of arbitrary crack shapes. Estimated weld residual stress for non-cracked components was distributed on the crack surface on the basis of superposition principle in order to calculate stress intensity factors. Specifically, the user subroutine DLOAD to specify a non-uniformly distribution load in ABAQUS was applied in the finite element analysis. Arbitrary crack shapes due to the crack propagation were expressed by applying the sub-modeling. The sub-modeling facilitated automatic modeling of cracked components. The estimation results intended for a SCC crack in the bottom of the reactor pressure vessel expressed the complicated crack growth shape along the weld metal. Moreover, crack growth behavior was estimated using the influence function method. The influence function method assumes arbitrary stress distribution and semi-elliptical crack shapes. Applicability of the influence function method was confirmed by comparisons with FEA results.

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

2020 ◽  
Author(s):  
Pankaj Dhaka ◽  
Raghu V. Prakash
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Fretting Wear ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Low Load ◽  
Dimensional Finite Element ◽  
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.

THREE DIMENSIONAL FINITE ELEMENT SIMULATION OF THE FRETTING WEAR PROBLEMS

2006 ◽  
Vol 20 (25n27) ◽  
pp. 3890-3895 ◽  
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 ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

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.

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