Rubber Covered Rolls—The Nonlinear Elastic Problem

1980 ◽  
Vol 47 (1) ◽  
pp. 82-86 ◽  
Author(s):  
R. C. Batra
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Contact Surface ◽  
Surface Stress ◽  
Pressure Profile ◽  
Elastic Problem ◽  
Geometrically Nonlinear ◽  
Finite Element Code ◽  
Rigid Cylinder ◽  
Nonlinear Elastic

The problem of the indentation of a rubberlike layer bonded to a rigid cylinder and indented by another rigid cylinder is analyzed. The rubberlike layer is assumed to be made of a homogeneous Mooney-Rivlin material. The materially and geometrically nonlinear problem is solved by using the finite-element code developed by the author. Results computed and presented graphically include the pressure profile at the contact surface, stress distribution at the bond surface and the deformed shape of the indented surface.

Advances in local mechanoelectrochemistry for detecting pitting corrosion in duplex steels

2004 ◽  
Vol 19 (12) ◽  
pp. 3688-3694 ◽  
Author(s):  
N. Mary ◽  
V. Vignal ◽  
R. Oltra ◽  
L. Coudreuse
Keyword(s):  
Finite Element ◽  
Stress Field ◽  
Pitting Corrosion ◽  
Surface Stress ◽  
Finite Element Code ◽  
Thermomechanical Model ◽  
Residual Surface Stress ◽  
Corrosion Tests ◽  
Microcell Technique ◽  
Duplex Steels

The goal of this study was to demonstrate that a relationship exists between surface stress and pitting corrosion. The surface stress field generated by polishing was first calculated using a thermomechanical model and a finite element code. Pitting corrosion tests performed at the microscale along the austenite/ferrite interface using the electrochemical microcell technique were then analyzed considering the microstructure, and the residual surface stress field calculated numerically under the microcapillary. Mechanical criteria are proposed leading to an enhancement of pitting corrosion of duplex steels.

Buried Pipe Modeling With Initial Imperfections

2004 ◽  
Vol 126 (2) ◽  
pp. 250-257 ◽  
Author(s):  
Junes A. Villarraga ◽  
Jose´ F. Rodrı´guez ◽  
Cora Martı´nez
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Beam Theory ◽  
Element Model ◽  
Problem Formulation ◽  
Element Formulation ◽  
Buried Pipe ◽  
Allowable Limit ◽  
Initial Imperfections ◽  
Nonlinear Elastic

A formulation using the finite element method is presented in this paper to analyze stresses and displacements of underground pipelines with initial imperfections. The formulation includes both thermal expansion of the pipeline and internal pressure. The method is based on large deformation beam theory with the finite element formulation based on Euler-Bernoulli beam elements of constant cross-section. The pipe-soil interaction is modeled as a nonlinear elastic foundation in the problem formulation. The resulting nonlinear finite element model with appropriate boundary conditions is solved using full Newton-Raphson as the iterative procedure. Numerical examples are provided to show the application of the methodology and to demonstrate the effect of the initial imperfections in the stress distribution of a buried pipe. The results show that initial imperfections have a considerable influence on the stress distribution of buried pipelines, leading in some cases to stress levels above the allowable limit established by the design codes. The results also help to identify the critical temperature at which buckling of the buried pipe might occur.

ANSYS-Based Finite Element Analysis on TBM Disc Cutter

2014 ◽  
Vol 889-890 ◽  
pp. 66-73 ◽  
Author(s):  
Ke Zhang ◽  
Zi Nan Wang ◽  
Hong Sun ◽  
Jian Sun ◽  
Yu Hou Wu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Surface Stress ◽  
Disc Cutter ◽  
Fragmentation Mechanism ◽  
Element Analysis ◽  
Stress Changes ◽  
Rock Load ◽  
Working Efficiency

The purpose of the essay is to know the rock fragmentation mechanism of TBM and improve the efficiency of disc cutter. The method of simulation is applied. The cutter ring and cutter axis surface stress distribution are studied under different rocks and the change of them is analyzed under different penetrations. Under different rocks conditions, the cutter ring surface stress is affected due to the change of rock load; the same rock condition, it is changed along with the change of penetrations. But the cutter axis surface stress changes little. In different rocks conditions, the change of stress on the cutter ring surface is proportional to rock ultimate stress; the same rock condition, it is proportional to the penetration of the cutter ring. The results are significant in improving the working efficiency of disc cutter.

Effect of Geometry on Stress Distribution of Spew Fillet of Co-Cured Composite Single Lap Joint

2011 ◽  
Vol 368-373 ◽  
pp. 179-182
Author(s):  
Guo Hua Zhao ◽  
Qing Lian Shu ◽  
Bo Sheng Huang
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Tensile Load ◽  
Finite Element Code ◽  
Lap Joint ◽  
Curve Edge ◽  
Single Lap Joint ◽  
Static Tensile

Spew fillet is common in co-cured composite single lap joint. It plays an important role in the safety of the joint. In this paper, three spew fillets with typical geometries under static tensile load were investigated numerically using the commercial finite element code ANSYS. The computation results indicated: the fillet with a long curve edge had better performance than other fillets.

FEA of Fretting Fatigue: A Comparison between ANSYS and ABAQUS

2011 ◽  
Vol 488-489 ◽  
pp. 662-665
Author(s):  
Magd Abdel Wahab ◽  
R. Hojjati Talemi ◽  
Patrick de Baets
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Contact Surface ◽  
Fretting Fatigue ◽  
Element Analysis ◽  
Fatigue Lifetime ◽  
Aluminum Specimen ◽  
Fretting Damage ◽  
Two Bodies

Fretting fatigue occurs when two contact bodies undergo small oscillatory relative motion due to cyclic loading. It leads to fretting damage, which reduces the service life of the bodies in contact. This can be explained by the high stresses generated at the contact surface between the two bodies. Therefore, numerical analysis, such as Finite Element Analysis (FEA), would be useful to understand the fretting fatigue phenomenon and to investigate techniques to reduce its effect on fatigue lifetime of mechanical components. In this paper, FEA of fretting fatigue Aluminum specimen is carried out in order to study the stress distribution and crack initiation location. Two commercial FEA packages, namely ANSYS and ABAQUS are used to analyze the specimen. The stress distribution along the contact surface between the two bodies obtained using both codes is compared and analyzed.

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