Study on the Wear of Wheel Flange/Rail Gauge Face

2005 ◽  
Author(s):  
Ying Jin ◽  
Makoto Ishida
Keyword(s):  
Residual Stress ◽  
Three Dimensional ◽  
Contact Geometry ◽  
Rolling Contact ◽  
Test Results ◽  
Wear Simulation ◽  
Real Contact ◽  
Laboratory Test Results ◽  
Material Hardness ◽  
Curved Track

This paper describes the measured results of an actual worn rail, stress analysis of wheel/rail corresponding to a real contact, and laboratory test results of wear simulation. In the research the worn rail in sharp curved track was investigated through residual stress measurements and micrographic observation. The contact stresses of wheel/rail were estimated with a three-dimensional FEM elastic-plastic model to study the effect of applied loads and contact geometry on wear progress of wheel and rail. The experimental wear simulation by using a large rolling contact machine has been carried out to estimate the actual wear of wheel/rail, and clarify the influence of material hardness and contact geometry on wear of wheel flange/rail gauge face.

scholarly journals A Study on Finite Element Modelling and Analysis with respect to Experimental Results of Strengthened Unreinforced Masonry Walls With and Without Kevlar-FRP

2021 ◽  
Vol 23 (2) ◽  
pp. 67-77
Author(s):  
Sugeng Wijanto ◽  
Takim Andriono ◽  
Jovita Tanudjaja
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Three Dimensional ◽  
Unreinforced Masonry ◽  
Shear Capacity ◽  
Masonry Walls ◽  
Test Results ◽  
Element Modelling ◽  
Laboratory Test Results ◽  
Set Up

Unreinforced masonry (URM) walls, found in most historical buildings in Indonesia, are relatively brittle with wide variety of material properties. The behaviour of URM walls is very complex, especially when subjected to seismic excitation. In this research, a finite element modelling was set up in order to analyse the seismic performance of URM wall experimental test units, with and without strengthening material. The analysis was conducted using SAP2000 computer program. Three dimensional solids and springs as link connectors were assigned to represent the masonry behaviour. This research aims to compare results obtained from the computer analysis and the previously conducted laboratory experiments. The effectiveness of Kevlar fibre material, which was installed on both wall surfaces and modelled as truss element was also investigated. It was found that the failure mechanisms shown by the SAP2000 model was similar to the laboratory test results. The use of Kevlar Fibre as strengthening material was found able to significantly increase the stiffness and shear capacity of the URM wall.

A Simplified Analysis of Rolling Elliptical Contacts in the Elastic–Plastic Range

1986 ◽  
Vol 200 (4) ◽  
pp. 237-243
Author(s):  
K W Yeung ◽  
S Lingard
Keyword(s):  
Residual Stress ◽  
Three Dimensional ◽  
Rolling Contact ◽  
Simplified Model ◽  
Stress Distributions ◽  
Plastic Range ◽  
Dimensional Problem ◽  
Elastic Plastic ◽  
Cumulative Deformation ◽  
Simplified Analysis

The paper presents an analysis of the deformations and stresses in the rolling contact of solids of revolution. The simplified model is based upon traction-free rolling and materials which are ideal elastic-plastic solids, but produces upper and lower bound solutions for groove formation and residual stress distributions which are realistic. Data for the three-dimensional problem are presented showing the process of cumulative deformation during a number of rolling cycles up to a steady state.

Finite-Element Evaluation of Burst Pressure Models for Corroded Pipelines

2016 ◽  
Vol 139 (2) ◽  
Author(s):  
Bipul Chandra Mondal ◽  
Ashutosh Sutra Dhar
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Reduction Factor ◽  
Burst Pressure ◽  
Design Codes ◽  
Pressure Reduction ◽  
Test Results ◽  
Laboratory Test Results ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Codes/standards have been developed to calculate accurately the burst pressure for corroded pipelines. Five burst pressure models are evaluated in this paper using three-dimensional finite-element (FE) analysis. The finite-element models are validated using burst test results available in the literature. The design codes/standards are found to calculate variable burst pressures with respect to the finite-element calculations and the laboratory test results. The variability in the calculated burst pressures is attributed to the use of different flow stresses for the material and different burst pressure reduction factors for the corroded geometry. The Folias factor is considered as the major parameter contributing to the burst pressure reduction factor. Three different equations are currently used to calculate the Folias factor in the design codes that are expressed in terms of l2/(Dt). However, the finite-element evaluation presented here reveals that the Folias factor also depends on other parameters such as the defect depth.

Tire Modeling by Finite Elements

1992 ◽  
Vol 20 (1) ◽  
pp. 33-56 ◽  
Author(s):  
L. O. Faria ◽  
J. T. Oden ◽  
B. Yavari ◽  
W. W. Tworzydlo ◽  
J. M. Bass ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Rolling Contact ◽  
Test Problems ◽  
State Behavior ◽  
Normal Contact ◽  
New Developments ◽  
Applied Torque ◽  
Dimensional Finite Element ◽  
Tire Modeling ◽  
Three Dimensional Finite Element

Abstract Recent advances in the development of a general three-dimensional finite element methodology for modeling large deformation steady state behavior of tire structures is presented. The new developments outlined here include the extension of the material modeling capabilities to include viscoelastic materials and a generalization of the formulation of the rolling contact problem to include special nonlinear constraints. These constraints include normal contact load, applied torque, and constant pressure-volume. Several new test problems and examples of tire analysis are presented.

Effect of Ibuprofen on Serum Laboratory Test Results

1983 ◽  
Vol 40 (6) ◽  
pp. 1025-1034
Author(s):  
Carol L. Colvin ◽  
Raymond J. Townsend ◽  
William R. Gillespie ◽  
Kenneth S. Albert
Keyword(s):  
Laboratory Test ◽  
Test Results ◽  
Laboratory Test Results

Influence of the Welded Joint on the Mechanical Behavior of Steel Piles during Static and Dynamic Deformation

2007 ◽  
Vol 345-346 ◽  
pp. 1469-1472
Author(s):  
Gab Chul Jang ◽  
Kyong Ho Chang ◽  
Chin Hyung Lee
Keyword(s):  
Residual Stress ◽  
Stress Distribution ◽  
Mechanical Behavior ◽  
Welded Joint ◽  
Dynamic Deformation ◽  
Three Dimensional ◽  
Steel Structures ◽  
Residual Stress Distribution ◽  
Dynamic Mechanical Behavior ◽  
Steel Piles

During manufacturing the welded joint of steel structures, residual stress is produced and weld metal is used inevitably. And residual stress and weld metal influence on the static and dynamic mechanical behavior of steel structures. Therefore, to predict the mechanical behavior of steel pile with a welded joint during static and dynamic deformation, the research on the influence of the welded joints on the static and dynamic behavior of steel pile is clarified. In this paper, the residual stress distribution in a welded joint of steel piles was investigated by using three-dimensional welding analysis. The static and dynamic mechanical behavior of steel piles with a welded joint is investigated by three-dimensional elastic-plastic finite element analysis using a proposed dynamic hysteresis model. Numerical analyses of the steel pile with a welded joint were compared to that without a welded joint with respect to load carrying capacity and residual stress distribution. The influence of the welded joint on the mechanical behavior of steel piles during static and dynamic deformation was clarified by comparing analytical results

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