On some Conceptual Considerations for the Finite Element Simulation of the Oxygen Out-Diffusion in Ag-MgO Composites

2009 ◽  
Vol 283-286 ◽  
pp. 1-5
Author(s):  
Andreas Öchsner
Keyword(s):  
Finite Element ◽  
Physical Properties ◽  
Atomic Oxygen ◽  
Oxide Interfaces ◽  
Bulk Properties ◽  
Nite Element ◽  
Element Simulation ◽  
Metal Ceramic ◽  
Numerical Tools ◽  
The Right

The presence of atomic oxygen at internal metal-ceramic oxide interfaces signi¯- cantly affects the physical properties of the interfaces which in turn affects the bulk properties of the material. The application of numerical tools such as the ¯nite element method requires some conceptional considerations if results from different finite element meshes of methods should be comparable. This paper summarises some of these thoughts in order to provide the right basis for comparative investigations.

scholarly journals Finite Element Modelling of Oxygen Diffusion and Segregation at Interfaces in Ag-MgO Composites: Parametric Studies

2008 ◽  
Vol 273-276 ◽  
pp. 461-466
Author(s):  
Andreas Öchsner ◽  
Irina V. Belova ◽  
Graeme E. Murch
Keyword(s):  
Finite Element ◽  
Finite Element Modelling ◽  
Atomic Oxygen ◽  
Model System ◽  
Point Of View ◽  
The Finite Element Method ◽  
Oxide Interfaces ◽  
Bulk Properties ◽  
Metal Ceramic ◽  
Parametric Studies

The presence of atomic oxygen at internal metal-ceramic oxide interfaces signifi- cantly affects the physical properties of the interfaces which in turn affects the bulk properties of the material. This problem is addressed for the model system Ag-MgO from a phenomenolog- ical point of view using the finite element method. The performed parametric studies investigate the influence of different kinetic parameters of the diffusion-segregation system.

Analysis of Oxygen Segregation at Metal-Oxide Interfaces Using a New Lattice Monte Carlo Method

2007 ◽  
Vol 129 ◽  
pp. 111-117 ◽  
Author(s):  
Irina V. Belova ◽  
Graeme E. Murch ◽  
Nilindu Muthubandara ◽  
Andreas Öchsner
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Physical Properties ◽  
Atomic Oxygen ◽  
Oxide Interfaces ◽  
Bulk Properties ◽  
Ceramic Oxide ◽  
Lattice Monte Carlo ◽  
Metal Ceramic ◽  
Constant Source

The presence of atomic oxygen at internal metal-ceramic oxide interfaces significantly affects the physical properties of the interfaces which in turn affects the bulk properties of the material. We address this problem for the case of a constant source of oxygen at the surface and periodic arrangements of ceramic oxide (MgO) inclusions embedded in a metal (Ag) matrix. We simulate the time-dependence of the oxygen concentration into the material using a newly developed lattice Monte Carlo method that takes into account a constant source of diffusant.

scholarly journals Modelling of Oxygen Diffusion and Segregation at Interfaces in Ag-MgO Composites

2007 ◽  
Vol 266 ◽  
pp. 29-38
Author(s):  
Irina V. Belova ◽  
Andreas Öchsner ◽  
Nilindu Muthubandara ◽  
Graeme E. Murch
Keyword(s):  
Oxygen Diffusion ◽  
Atomic Oxygen ◽  
Composite System ◽  
Point Of View ◽  
Model Composite ◽  
Oxide Interfaces ◽  
Bulk Properties ◽  
Metal Ceramic ◽  
Phenomenological Point ◽  
Good Agreement

The presence of atomic oxygen at internal metal-ceramic oxide interfaces significantly affects the physical properties of the interfaces which in turn affects the bulk properties of the material. This problem is addressed for the model composite system Ag-MgO from a phenomenological point of view using a lattice-based Monte Carlo method and a finite element method extended with special user-subroutines. We simulate the time dependence of oxygen depth and contour profiles. We are able to show very good agreement between these two methods.

Corner-Filleted Flexure Hinges

2000 ◽  
Vol 123 (3) ◽  
pp. 346-352 ◽  
Author(s):  
Nicolae Lobontiu ◽  
Jeffrey S. N. Paine ◽  
Ephrahim Garcia ◽  
Michael Goldfarb
Keyword(s):  
Finite Element ◽  
Closed Form ◽  
Finite Element Simulation ◽  
Analytical Approach ◽  
Flexure Hinge ◽  
Closed Form Solutions ◽  
Flexure Hinges ◽  
Element Simulation ◽  
Model Predictions ◽  
The Right

The paper presents an analytical approach to corner-filleted flexure hinges. Closed- form solutions are derived for the in-plane compliance factors. It is demonstrated that the corner-filleted flexure hinge spans a domain delimited by the simple beam and the right circular flexure hinge. A comparison that is made with the right circular flexure hinges indicates that the corner-filleted flexures are more bending-compliant and induce lower stresses but are less precise in rotation. The finite element simulation and experimental results confirmed the model predictions.

Analysis of magnetic force and dynamic characteristic for non-contact permanent magnet linear drive device

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1337-1345
Author(s):  
Chuan Zhao ◽  
Feng Sun ◽  
Junjie Jin ◽  
Mingwei Bo ◽  
Fangchao Xu ◽  
...  
Keyword(s):  
Finite Element ◽  
Permanent Magnet ◽  
Dynamic Characteristic ◽  
Driving Force ◽  
Magnetic Circuit ◽  
Response Speed ◽  
Computation Method ◽  
Element Analysis ◽  
Element Simulation ◽  
The Relationship

This paper proposes a computation method using the equivalent magnetic circuit to analyze the driving force for the non-contact permanent magnet linear drive system. In this device, the magnetic driving force is related to the rotation angle of driving wheels. The relationship is verified by finite element analysis and measuring experiments. The result of finite element simulation is in good agreement with the model established by the equivalent magnetic circuit. Then experiments of displacement control are carried out to test the dynamic characteristic of this system. The controller of the system adopts the combination control of displacement and angle. The results indicate that the system has good performance in steady-state error and response speed, while the maximum overshoot needs to be reduced.

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