Technical Papers and Presentations

Here you will find presentations given at COMSOL Conferences around the globe. The presentations explore the innovative research and products designed by your peers using COMSOL Multiphysics. Research topics span a wide array of industries and application areas, including the electrical, mechanical, fluid, and chemical disciplines. Use the Quick Search to find presentations pertaining to your application area.

Stress State Determination in Nanoelectronic Silicon Devices Coupling COMSOL Multiphysics and a Recursive Dynamical CBED Pattern Simulation

A. Spessot[1,2], S. Frabboni[1], A. Armigliato[3], and R. Balboni[3]
[1]Numonyx Advanced R&D NVMTD-FTM, Agrate Brianza, Italy
[2]National Research Center S3, CNR-INFM and Department of Physics, University of Modena e Reggio Emilia, Modena, Italy
[3]CNR-IMM Section of Bologna, Italy

Strained technology is being promoted as the best way to extend the performance of semiconductor transistors. An inhomogeneous layer deposited on top of a silicon device can induce a strong modification in the real silicon strain state, and consequently in its electronic performance. Coupling the finite elements analysis done by COMSOL with a recursive CBED and LACBED dynamical simulation, we are ...

Identification of the Complex Moduli of Orthotropic Materials using Modal Analysis

F. Van den Abeele[1], J.R. De Oliveira Jr.[2], and F.J. Huertos[1]
[1]OCAS N.V., J.F. Kennedylaan 3, Zelzate, Belgium
[2]Federal University of Minas Gerais, Belo Horizonte, Brazil

It is very difficult to measure the global properties of heterogeneous and anisotropic materials like composites and sandwich structures. When designing composite sandwich applications, the elastic properties are required to perform structural stiffness and strength calculations. However, due to their anisotropic nature, it is not straightforward to measure these properties with traditional ...

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 ...

Assessment of Anterior Spinal Artery Blood Flow following Spinal Cord Injury

M. Alshareef[1], A. Alshareef[2], V. Krishna[3], M. Kindy[3], T. Shazly[4]
[1]College of Medicine, Medical University of South Carolina, Charleston, SC, USA
[2]Department of Biomedical Engineering, Duke University, Durham, NC, USA
[3]Department of Neurosurgery, Medical University of South Carolina, Charleston, SC, USA
[4]Department of Mechanical Engineering, University of South Carolina, Columbia, SC, USA

The incidence of spinal cord injury (SCI) in the US is approximately 12,000 individuals annually, due to various forms of trauma and disease. Diminished flow over a prolonged period of time can cause permanent spinal damage. We constructed a 3D finite element model of the spinal cord to examine the role of compressive loading on spinal blood flow. It was found that the type of forces on the ...

Deformable Image Registration for Pleural Photodynamic Therapy

B. Liu[1], T. C. Zhu[1]
[1]Department of Radiation Oncology, School of Medicine, University of Pennsylvania, Philadelphia, PA, USA

Deformable image registration is a form of medical image processing that can provide insights into the development of phenomenon and variation in normal anatomical structure over time. Prior to post-operative pleural photodynamic therapy (PDT), a series of CT scans of lungs will be acquired. During PDT treatment, an infrared navigation system is used to contour the lungs and provide real-time ...

Estimation of Volcanic Deformation Source Parameters Through Optimization of Geodetic Data at Cotopaxi Volcano, Ecuador - new

J. Hickey[1], J. Gottsmann[1], P. Mothes[2]
[1]University of Bristol, Bristol, UK
[2]Instituto Geofísico, Escuela Politécnica Nacional, Quito, Ecuador

Volcanic eruptions are often preceded by periods of unrest, where the behavior of the volcano deviates from a background level towards one of increasing concern [1]. Understanding what causes and contributes to unrest is a key challenge in volcanology today, influencing risk mitigation and hazard forecasting. Deformation of the volcanic edifice is one such indicator of unrest owing to a ...

Numerical modelling of the damage potential of climate variations to a historic wooden cabinet

Z. Huijbregts, H. Schellen, and J. van Schijndel
Department of the Built Environment
Eindhoven University of Technology
Eindhoven, The Netherlands

The two wooden cabinets of Jan van Mekeren that are located in Amerongen Castle show comparable wood damage; in particular large cracks in the cabinet doors are clearly noticeable. It is assumed that these cracks were caused by bad indoor climate conditions in the castle. Combined computational modelling of the indoor climate conditions in the castle and the hygroscopic and mechanical ...

Simulation of the Behaviour of a Knitted Structure Made of NiTi Wires to the Mechanical Loading

J. Kafka
Technical University of Liberec
Department of Engineering Mechanics
Liberec, Czech Republic

This article describes the response of the knitted fabric to the mechanical loading and how a simplified FE model can approach realistically the response of the structure to the mechanical loading. The knitted fabric is made of nitinol material, which belongs to the group of shape memory alloys. The simulations show the behaviour of this structure in unidirectional stretching and in bending by ...

Densification and Shape Change of Calcined High Level Waste During Hot-Isostatic Pressing

T. Burnett, and D. Lower
CH2M-WG Idaho, LLC
The Idaho Cleanup Project at the Idaho National Laboratory
Idaho Falls, ID

Hot Isostatic Pressing (HIP) has been selected as a means of treating calcined high level waste (HLW). The process combines high temperature and pressure to densify the HLW in to a mineral similar to the geologic formulation of granite. This study uses COMSOL to predict densification and shape deformation of a stainless steel can filled with HLW. Two approaches were used to model densification ...

The Non Linear Behavior of the Microplane Model in COMSOL

A. Frigerio[1]
[1]RSE, Milano, Italy

The safety of large civil structures is often evaluated by means of numerical models based on the Finite Element Method (FEM). In the last year, the elastic behavior of the Microplane Model was implemented in COMSOL because it is a promising approach able to overcome the limit typical of the classical approaches, which in general are able to simulate in a proper way only a few specific ...

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