Finite element analysis of spiral strands with different shapes subjected to axial loads

2015 ◽  
Vol 83 ◽  
pp. 45-58 ◽  
Author(s):  
Eva Stanova ◽  
Gabriel Fedorko ◽  
Stanislav Kmet ◽  
Vieroslav Molnar ◽  
Michal Fabian
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Axial Loads ◽  
Element Analysis ◽  
Different Shapes

Influence of Different Shapes to the Dynamic Mechanical Properties of Bioprosthetic Heart Valve

2012 ◽  
Vol 500 ◽  
pp. 417-422
Author(s):  
Xu Huang ◽  
Quan Yuan ◽  
Cheng Rui Zhang ◽  
Hai Bo Ma ◽  
Xin Ye
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Heart Valve ◽  
Dynamic Mechanical Properties ◽  
Bioprosthetic Heart Valve ◽  
Element Analysis ◽  
Geometrical Features ◽  
The Finite Element Analysis ◽  
Different Shapes

The stress with different shapes of the same thickness of the leaflet under the same load is analysed and compared by us. We create the spherical and ellipsoidal curved surface in accordance with geometrical features. The experimental results of the finite element analysis show that stress distribution of the different bioprosthetic heart valve leaflets with the same thickness is different. This work is very helpful to manufacture reasonable shaped valvular leaflets and to prolong the lifetime of the bioprosthetic heart valve.

A semi-analytical analysis on beam-column ultimate strength with different initial deflections

2016 ◽  
Vol 13 (6) ◽  
pp. 487-493
Author(s):  
Zhongwei Li ◽  
Xiaochuan Yu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ultimate Strength ◽  
Design Methodology ◽  
Computer Code ◽  
Element Analysis ◽  
Content Type ◽  
Beam Columns ◽  
Different Shapes ◽  
Good Agreement

Purpose A new beam-column ultimate strength calculation method has been developed and compared with nonlinear finite element analysis by ANSYS and ABAQUS. Design/methodology/approach A computer code ULTBEAM2 based on this method has been used for one and three span beam-columns with I-shaped cross-section under axial compression. Findings This paper studies the ultimate strength of beam-columns with various initial deflections of different shapes and magnitudes. Originality/value The comparison of ULTBEAM2 and finite element analysis shows good agreement for all cases with different initial deflections.

Optimization and Comparison of Electromagnetic Vibration Energy Harvesters Under Constant Volume Conditions

2013 ◽  
Author(s):  
Hanmin Lee ◽  
Young-Cheol Kim ◽  
Jaewon Lim ◽  
Seong-Whan Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Electromagnetic Coupling ◽  
Constant Volume ◽  
Vibration Energy ◽  
Element Analysis ◽  
Energy Harvesters ◽  
Electromagnetic Vibration ◽  
Different Types ◽  
Different Shapes

Previous studies on optimization of electromagnetic vibration energy harvesters assumed the radius and the height of a cylindrical construction volume to be fixed. We present optimization and comparison of three different types of electromagnetic vibration energy harvesters under constant volume conditions where the radius or the height can also be a design variable. The voltage and the power output are calculated for each architecture using finite element analysis. We found that different types of electromagnetic coupling architectures can be optimized with different shapes of the construction volumes.

Finite Element Analysis of Distinguish between Two Bone Materials in Femoral Fixation System

2014 ◽  
Vol 915-916 ◽  
pp. 883-886
Author(s):  
Li Min Dong ◽  
Ya Lei Gao ◽  
Wei Chen
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Maximum Stress ◽  
Stress And Strain ◽  
Axial Loads ◽  
Element Analysis ◽  
Bone Material ◽  
Significant Difference ◽  
Single Bone ◽  
Fixation System

This paper deals with the difference of finite element analysis of results between distinguishing bone materials modeling and single bone material modeling. The computed tomography (CT) data was used to build the model that can distinguish cortical bone, cancellous bone of the femur model, together with the plates could be used to set up internal fixation system and do the finite element analysis. The results indicated that the distributions of stress and strain were basically the same, so were the location of the maximum stress and strain. While, except under the axial loads the value of maximum stress and the value of maximum strain showed significant differences. Finally, study reached the conclusion that under the axial loads there were no significant difference between the two methods, thus the single bone material model could be used for easier computing, while, under the other 4 consequences paper recommended distinguishing bone material method for more practical results.

About the Influence of the Corrosion Defect Geometry on Repaired Pipes Stress Distribution

2020 ◽  
Vol 143 (1) ◽  
Author(s):  
Ionut Lambrescu ◽  
Alin Dinita ◽  
Mihail Minescu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Surface Defects ◽  
Three Dimensional ◽  
Stress Distributions ◽  
Pipe Axis ◽  
Element Analysis ◽  
New Approach ◽  
Defect Area ◽  
Different Shapes

Abstract This paper proposes a new approach in dealing with volumetric surface defects (VSD) in pipelines. Using three-dimensional (3D) scanning and reverse engineering techniques, along with finite element analysis, we studied and evaluated comparatively the stress distributions in the defect area for different shapes and positions of the machined VSD, in order to find the best solution for the repairing process using composite materials. Our main conclusion is that instead of machining the VSD such as to generate a rectangular shaped machined defect, with edges parallel/perpendicular to the pipe axis, it is better to mold the VSD. Another possible solution would be to machine the real VSD such as to generate an inclined rectangle that circumscribes the defect. This paper also studies the influence of the machined defect filet radius to the bottom of the VSD.

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