Oyster Creek Nuclear Generating Station Containment Drywell Buckling Analysis

2010 ◽  
Author(s):  
Soo Bee Kok ◽  
Shu S. Tang ◽  
Francis H. Ku ◽  
Marcos L. Herrera ◽  
John F. O’Rourke ◽  
...  
Keyword(s):  
Finite Element ◽  
Structural Integrity ◽  
Three Dimensional ◽  
Buckling Analysis ◽  
Eigenvalues And Eigenvectors ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Buckling Stability ◽  
Stability Limits

This article presents the overall methodology and the results of the three-dimensional (3D) finite element buckling analysis of the primary containment drywell shell at the Oyster Creek Nuclear Generating Station (Oyster Creek). The buckling stresses, eigenvalues, and eigenvectors are computed using ANSYS finite element analysis software [1], and the structural integrity of the drywell in terms of the buckling (stability) limits are based on the ASME B&PV Code Case N-284-1 [2].

A 3-D Calculation of Electromagnetic Field in a Multiphase Induction Motor

2013 ◽  
Vol 756-759 ◽  
pp. 4591-4595
Author(s):  
Wen Yu Song
Keyword(s):  
Finite Element ◽  
Electromagnetic Field ◽  
Flux Density ◽  
Optimization Design ◽  
Complex Structure ◽  
Three Dimensional ◽  
Induction Machine ◽  
Machine Model ◽  
Element Analysis ◽  
3D Finite Element

Three-dimensional finite element analysis of harmonic electromagnetic field in a large and complex structure 15-phase induction machine has been completed. Accurate 3D finite element machine model is established. The current density of stator and rotor and the entire vector flux density distribution are given, then been analyzed and explained. 3D air gap radial flux density is obtained and has been made harmonic analysis. We can get more accurate electromagnetic field distribution and performance parameters through 3D finite element calculation of electromagnetic field. This method can give theoretical basis for the multiphase machine development of new structure and can play reference in terms of structural optimization design.

An Investigation of Three Dimensional Elastic-Plastic Hemispherical Sliding Contact, Part II: Results

2007 ◽  
Author(s):  
John Moody ◽  
Itzhak Green
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Sliding Contact ◽  
Net Energy ◽  
Asperity Contact ◽  
Element Analysis ◽  
3D Finite Element ◽  
Elastic Plastic ◽  
Contact Part

This work presents the results from a three dimensional (3D) finite element analysis (FEA) of an elastic-plastic asperity contact model for two spherical bodies sliding across each other with various preset vertical interferences. Stresses, forces, contact areas, deformations, and net energy loss are presented for steel-on-steel and aluminum-on-copper contact.

The Simulation of Rolling Process of Wire with Y-Type Roller

2014 ◽  
Vol 602-605 ◽  
pp. 709-712
Author(s):  
Jin Hong Ma ◽  
Bin Tao ◽  
Xiao Han Yao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rolling Mill ◽  
Three Dimensional ◽  
Rolling Process ◽  
Stress And Strain ◽  
Analysis Software ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Three Dimensional Models

Y-Type rolling mill with three roller is a new kind of wire mill.The three-dimensional models of rolling are established by Pro/E. Based on the finite element analysis software ANSYS/LS-DYNA, the rolling process of wire by Y-type rollers is simulated. The rolling piece movement is analysed. Stress and strain of Y-type roller are also analysed.

Optimization of the Frame and Performance Analysis of Solar Modules Based on Ansys Workbench and Solidworks

2016 ◽  
Vol 693 ◽  
pp. 169-173
Author(s):  
Wei Hua Wei ◽  
Ya Nan Zhu ◽  
Tong Ming Xue ◽  
Si Yuan Xie ◽  
Cheng Rong Yuan ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Defect Detection ◽  
Three Dimensional ◽  
Analysis Software ◽  
Element Analysis ◽  
Load Tests ◽  
And Performance ◽  
Factory Laboratory ◽  
Ansys Workbench

Taking advantage of three-dimensional software Solidworks to model for solar modules and also using finite element analysis software Ansysworkbench to conduct the stress analysis and strength check of modules, to analyze the deformation of modules under certain loading conditions, to conduct load tests and defect detection (EL experiments) and to optimize encapsulation with aluminum frame combined with the factory laboratory. The results show that: the modules have no crack and other defects and their power attenuation does not exceed the specified value after the 2.0mm thickness aluminum frame was reduced to 1.7mm.

A Three-Dimensional Finite Element Analysis of Restored Deciduous Canine

2015 ◽  
Vol 638 ◽  
pp. 123-129 ◽  
Author(s):  
Florin Baciu ◽  
Claudia Bratosin ◽  
Aurelia Rusu-Casandra
Keyword(s):  
Finite Element ◽  
Structural Integrity ◽  
Bone Structure ◽  
Three Dimensional ◽  
Medical Problem ◽  
Ct Scanner ◽  
Chronic Infections ◽  
Element Analysis ◽  
Tooth Structure ◽  
Three Dimensional Finite Element

The literature reports that dental cavities are an international public health challenge and treatment of decays especially for young children is a medical problem of great importance. Early childhood caries progress rapidly and can cause functional, physical and dentofacial aesthetic impairment. Recent studies show that caries lesions can compromise children’s quality of life due to the pain and discomfort which could lead to disfigurement, acute and chronic infections and to alteration of meals and sleeping habits. Tooth decay occurs when acids in the mouth dissolve the outer layers of the tooth, stripping the tooth of important minerals. Because dental decay often goes untreated, the cavity grows and more tooth structure is lost. Restorative dentistry has the main purpose of rehabilitating the function and aesthetic of tooth. The structural integrity of the restored teeth depends on the state of stress in their different regions due to occlusal loads. The aim of this study performed with the finite element method is to evaluate the stress and strain distributions in bone structure-primary canine-restorative material assembly when a load of 120N is applied all over the upper surface of the model. Particular attention was given to an accurate computer reconstruction of the canine. Therefore with the aid of a CT scanner the tomography images obtained were processed with a special software (Mimics). Two dental restorative materials, commonly used in practice were chosen for the analysis and the results acquired are compared. Also the contact pressure at the interface bone-deciduous canine and deciduous canine-dental material is evaluated in both cases.

Structural Integrity Assessment Criteria and Service Life Prediction of Cold Wrinklebends

2012 ◽  
Author(s):  
Xian-Kui Zhu ◽  
Brian N. Leis
Keyword(s):  
Finite Element ◽  
Service Life ◽  
Structural Integrity ◽  
Pipeline Steel ◽  
Three Dimensional ◽  
Computation Time ◽  
Element Analysis ◽  
Integrity Assessment ◽  
Fea Model ◽  
Hardening Models

Three-dimensional elastic-plastic finite element analysis (FEA) is performed in this paper to simulate the complicated stresses and deformation of wrinklebends in a pipeline from its bending formation to operation under cyclic loading. Three plastic hardening models (isotropic, kinematic and combined isotropic/kinematic) are discussed and used in FEA of wrinklebend response that considers strain hardening and Bauschinger effects. The FEA simulation is carried out first for an elbow held at constant pressure while subject to cyclic bending, which serves as a benchmark case. The results show that the three hardening models lead to very different outcomes. Comparable FEA simulations are then developed for wrinklebends under cyclic pressure. Detailed parametric analysis is considered, including finite-element type, element sensitivity, computation time, and material input data. Based on those results viable nonlinear FEA model is developed as the basis to quantify wrinklebend response under service-like conditions. Based on the FEA results, fatigue damage is quantified using the Smith, Watson and Topper (SWT) parameter, and thereafter a damage criterion is proposed to predict the fatigue life of a wrinklebend under the pressure cycles of 72%–10% of SMYS for typical X42 pipeline steel. The results show that the wrinkle aspect ratio H/L is a key parameter to control the service life of a wrinklebend.

STUDY OF HOLLOW STEMMED HIP BONE FORMING

2017 ◽  
Vol 41 (4) ◽  
pp. 531-542 ◽  
Author(s):  
Dyi-Cheng Chen ◽  
Jheng-Guang Lin
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Titanium Alloys ◽  
Effective Stress ◽  
Experimental Results ◽  
Analysis Software ◽  
Element Analysis ◽  
3D Finite Element ◽  
Friction Factors ◽  
Punch Load

This study investigated hollow stemmed hip forging for enhancing the biocompatibility of Ti-6AL-4V titanium alloys. Instead of using the expensive titanium billet, this study applied DEFORMTM 3D finite element analysis software to simulate and analyze stem forming with respect to different die temperatures, friction factors, punch types, forging velocities, and billet temperatures. On the basis of its shape, a punch can be classified as flat head, ladder shaped, spherical, and conical. These differences affect the effective stress and punch load after stem formation. The experiment parameters were determined using the Taguchi L16 (45) orthogonal table. Both the simulated and experimental results indicated that the error for the size of the bone stem was less than 2%.

scholarly journals Effect of Offset Implant Placement on the Stress Distribution Around a Dental Implant: A Three-Dimensional Finite Element Analysis

2015 ◽  
Vol 41 (6) ◽  
pp. 646-651 ◽  
Author(s):  
Hakimeh Siadat ◽  
Shervin Hashemzadeh ◽  
Allahyar Geramy ◽  
Seyed Hossein Bassir ◽  
Marzieh Alikhasi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Stress Distribution ◽  
Dental Implant ◽  
Three Dimensional ◽  
Element Analysis ◽  
3D Finite Element ◽  
Implant Placement ◽  
Mandibular Molar

There are some anatomical restrictions in which implants are not possible to be inserted in their conventional configuration. Offset placement of implants in relation to the prosthetic unit could be a treatment solution. The aim of this study was to evaluate the effect of the offset placement of implant-supported prosthesis on the stress distribution around a dental implant using 3D finite element analysis. 3D finite element models of implant placement in the position of a mandibular molar with 4 configurations (0, 0.5, 1, 1.5 mm offset) were created in order to investigate resultant stress/strain distribution. A vertical load of 100 N was applied on the center of the crown of the models. The least stress in peri-implant tissue was found in in-line configuration (0 mm offset). Stress concentration in the peri-implant tissue increased by increasing the amount of offset placement. Maximum stress concentration in all models was detected at the neck of the implant. It can be concluded that the offset placement of a single dental implant does not offer biomechanical advantages regarding reducing stress concentration over the in-line implant configuration. It is suggested that the amount of offset should be as minimum as possible.

Based on Pro/E and Ansys'Finite Element Analysis of Conveying Roller

2012 ◽  
Vol 271-272 ◽  
pp. 797-800
Author(s):  
Chan Juan Chen ◽  
Zhou Wen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Local Strain ◽  
Analysis Software ◽  
Roller Conveyor ◽  
Element Analysis ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Modeling Software

In order to study conveying roller force and improve its mechanical properties, we use three-dimensional modeling software Pro/E to build the solid model of the Apple box delivery device’s conveying roller. Using finite element analysis software Ansys to analyze conveying roller’s bending stress, we can get images of local strain and displacement contours .Contrasting with factory’s broken roller conveyor, we can find that: through the establishment of appropriate boundary conditions, Ansys can accurate finite element analysis, and provide the basis for the conveying roller structure improvements.

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