Veröffentlichungen und Präsentationen

Hier finden Sie Veröffentlichungen und Präsentationen der weltweit stattfindenden COMSOL-Konferenzen. In diesen präsentieren Ihre Fachkollegen ihre neuesten mit COMSOL Multiphysics entwickelten Produkte und Ideen. Die Forschungsthemen umfassen ein weites Feld von Industrien und Anwendungsbereichen, die von Mechanik und Elektronik über Strömungen bis zur Chemie reichen. Nutzen Sie die Quick Search, um die zu Ihrem Forschungsbereich passenden Präsentationen zu finden.

Thermal Stress in a Zero Thermal Expansion Composite

C. Romao, and M. White
Dept. of Chemistry and Institute for Research in Materials
Dalhousie University
Halifax, NS
Canada

A series of 2-D finite element models of a ZrO2-ZrW2O8 composite system were created in COMSOL Multiphysics to study the effect of pores between the matrix (ZrO2) and filler (ZrW2O8) materials. Pores were modeled as ellipses concentric with the filler particles. Seventeen model geometries of varying microstructure were studied in order to determine correlations between microstructural factors ...

Optimized Cantilever-to-Anchor Configurations of Buckled Cantilever Plate Structures for Transducer Applications

A. Arpys Arevalo Carreno[1], D. Conchouso Gonzalez[1], I.G. Foulds[1]
[1]King Abdullah University of Science and Technology, Thuwal, Mecca, Kingdom of Saudi Arabia

The mechanical simulation and analysis of the cantilever-to-anchor configuration for an out-of-plane structure used in transducer applications is reported. The polymer-based Buckled Cantilever Plate “BCP” structure, gives the ability to orient an active device from a horizontal to a vertical position, once assembled. In this paper we compare four different cantilever-to-anchor ...

A Mixed Boundary Value Problem That Arises in the Study of Adhesively Bonded Structures

R. Malek-Madani, and J.J. Radice
US Naval Academy, Annapolis, MD, USA

The study of deformation of an adhesively bonded sandwich structure reduces to solving the biharmonic equation for the Airy Stress subject to mixed boundary conditions. Because of the nature of the boundary conditions, this boundary value problem does not yield to the standard elementary methods and must be attacked by numerical methods. In this paper we will use COMSOL\'s capability in two ways ...

Simulation of a Seal

V. Viola[1]
[1]CARCO, Basiano, Milano, Italy

Simulations of more than one type of seal have been done where the deformation and the stress of the seal itself or the pressure on the housing are of interest. According to the deformation of the seal we can modify the housing of the seal or its geometry depending on the design constraints to meet. Stresses on the seal are indicators of which changes have to be implemented on the geometry so to ...

Multiphase Transport with Large Deformations Undergoing Rubbery-Glassy Phase Transition: Applications to Drying

T. Gulati[1], A. Datta[1]
[1]Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA

Drying of biomaterials such as foodstuffs involves mass, momentum and energy transport along with large shrinkage of the porous material, which have significant effects on their final quality. Foodstuffs exhibit non-linearity when undergoing large deformations that affect the transport process in a critical way. Thus, it becomes important to perform a two-way coupling of the multiphase transport ...

Equation-Based Modeling: The Structural Contact Problem Solved by The Velocity Approach

O. Toscanelli, and V. Colla
Scuola Superiore S. Anna, Pisa, Italy

The contact between infinitely rigid body and deformable part is studied using the velocity as a dependent variable. A simple forging case is evaluated. The velocity approach is realized by means of using COMSOL with the Equation-Based Modeling. The contact model evaluated in this work is suitable to model the forging process. For a given mesh and element it is possible to choose the optimum ...

Investigation of the Effect of Spinal Defects on Spondylolysis and Stress Fracture of Vertebral Bodies

M.S. Yeoman[1], C. Quah[2], A. Cizinauskas[1], K. Cooper[1], D. McNally[5], B. Boszczyk[2]
[1]Continuum Blue, Tredomen, Ystrad Mynach, United Kingdom
[2]The Centre for Spinal Studies and Surgery, Queen’s Medical Centre, Nottingham, United Kingdom
[5]Bioengineering Research Group, Faculty of Engineering, The University of Nottingham, Nottingham, United Kingdom

Spondylolysis (SL) is a defect of the spinal vertebra, and is typically caused by stress fracture of the pars interarticularis bone of the vertebral arch. It is especially common in adolescents who over train in sporting activities. Spina bifida occulta (SBO) is a malformation of the spine where the protruding vertebral bodies are not fully formed. In this study we demonstrate the predisposition ...

Numerical approach of film thickness and friction in EHL by F.E.M.

Demirci, I., Vergne, P.
Laboratoire de Mécanique des Contacts et des Solides LaMCoS, UMR CNRS-INSA de Lyon, Villeurbanne cedex

Hydrodynamic lubrication applies when two moving solids are separated by a lubricant film in which significant pressure occurs. Elastohydrodynamic lubrication (EHL) prevails if the pressure is high enough to elastically deform the solid surfaces. The hydrodynamic pressure is given by the Reynolds equation. This equation is derived from the Navier-Stockes relationships with the following ...

Energy Transformation Damping

G.S. Mulder[1]
[1]Leiden, The Netherlands

A model for material damping is presented in terms of internal friction and in terms of a variation of stiffness. In the latter case the idea is that the stiffness increases if elastic energy is stored and decreases if elastic energy is released. In case of a single mass spring system “stiffness” refers to the stiffness of the spring; in case of a continues object ...

Simulation Studies on Stress Generation and Volume Expansion due to Electrochemical Lithium Insertion in a Silicon Nanowire

G. Sikha, and J. Gordon
Applied Materials, Inc.
Santa Clara, CA

Silicon electrodes are presently being pursued as the potential negative electrode for lithium-ion batteries owing to its high gravimetric (mAh/g) and volumetric capacity (mAh/L) compared to the existing state of the art graphite electrode. Recent experimental studies have demonstrated the use of nano size Si electrodes which minimizes insertion induced stresses due to facile strain ...

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