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.
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Study of Hard-and Soft- Magnetorheological Elastomers (MRE’s) Actuation Capabilities

J. Roche[1], P. Von Lockette[1], and S. Lofland[2]
[1]Mechanical Engineering Dept., Rowan University, Glassboro, NJ
[2]Physics and Astronomy Dept., Rowan University, Glassboro, NJ

In this study, magneto-rheological elastomer (MRE) composite beams made of Barium hexaferrite (BaM) and Iron (Fe) powders combined with a highly-compliant matrix material were simulated using COMSOL\'s Solid Mechanics and AC/DC modules. The goal of the work was to develop models capable of predicting the actuation behavior of hard- and soft-magnetic MREs. This work simulates the bending of ...

A Parametric Study on the Dynamic Behavior of Cable Supported Bridges Under Moving Loads Affected by Accidental Failure Mechanisms

P. Lonetti[1], A. Pascuzzo[1], R. Sarubbo[1]
[1]Department of Structural Engineering, University of Calabria, Rende, Cosenza, Italy

The dynamic behavior of cable supported bridges subjected to moving loads and affected by corrosion and accidental failure mechanism in the cable suspension system is investigated. The different types of cable supported bridges are distinctively characterized by the configuration of the cable system [1]. The suspension system comprises a parabolic main cable and vertical hanger cables connecting ...

Modeling of the Photo-Mechanical Response of Liquid-Crystal Elastomers

G. Cerretti[1], J.-C. Gomez-Lavocat[1][2], K. Vynck[1], D.S. Wiersma[1][3]
[1]European Laboratory for Non-Linear Spectroscopy (LENS), University of Florence, Sesto Fiorentino, Italy
[2]The Institute of Photonic Sciences (ICFO), Mediterranean Technology Park, Castelldefels, Spain
[3]Istituto Nazionale di Ottica (INO), National Research Council (CNR), Florence, Italy

Liquid-crystal elastomers (LCEs) [1] have attracted a great attention in recent years due to their high potential in a wide range of applications, from microfluidics components [2] to artificial muscles [3]. The photo-mechanical response of LCEs is due to their constitutive photo-sensitive molecules, which change shape when absorbing part of the incident light. These microscopic deformations can ...

A COMSOL Multiphysics® Software Analysis of Beam Tube Cooling in the High Flux Isotope Reactor of ORNL

J. D. Freels [1],
[1] Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

Previous to the present work, a formal calculation was approved [1,2] to support the operation of the High Flux Isotope Reactor (HFIR) Horizontal Beam-Tube 1 of 4 (HB-1). The present calculation [3,4] repeats the previous work using COMSOL Multiphysics® software and extends the analysis to cover a broader range of coolant flow. In addition, this new calculation expands the analysis much further ...

Modeling and Simulation of Piezoresistive Pressure Sensor for 2bar Application

M. Ramezani [1], M. El Barkouky [1],
[1] Melexis, Tessenderlo, Belgium

In this paper, we focused on modeling of the piezoresistive pressure sensors. The Structural Mechanics Module of COMSOL Multiphysics® software is used to model the sensor and make a comparative study of the MEMS pressure sensor with different shape and size of membrane. The impact of membrane shape and size on sensitivity and nonlinearity of the pressure sensor is investigated. For example, it ...

Thermal Properties of Copper Tungsten with Copper Via Composite

J. Ma[1], A. Parker[1], and K. Kuan[2]
[1]Southeastern Louisiana University, Hammond, LA, USA
[2]Torrey Hill Technology LLC, SanDiego, CA, USA

This study focuses on a low-cost composite material based on CuW with Cu via, which functions as a more efficient thermal path for heat conduction. A 50mm X 50mm X 1mm CuW(15/85) speciman consists an array of 30X30 uniformly distributed cylindrical Cu via attaching to a microprocessor generating 100 watts power was studied. By calculating the heat flux coming out of the top and the ...

FEM Study on the Effect of Metallic Interdigital Transducers on Surface Acoustic Wave(SAW) Velocity in SAW Devices

A. K. Namdeo, and H. B. Nemade
Department of Electronics and Electrical Engineering
Indian Institute of Technology Guwahati
Assam, India

In this paper, we present study on the mass loading effect of the interdigital transducer (IDT) on surface acoustic wave (SAW) velocity in SAW devices, using COMSOL Multiphysics. We have simulated a one port SAW resonator made on YZ lithium niobate substrate and investigated the reduction of SAW velocity caused by the mass loading of aluminum IDT fabricated over the substrate, using finite ...

Towards Rotordynamic Analysis with COMSOL Multiphysics

M. Karlsson[1]
[1]ÅF, Stockholm, Sweden

In this paper a pre-study on using COMSOL Multiphysics for rotordynamic analysis is presented. It is concluded that it is possible to use COMSOL Multiphysics to perform rotordynamical analysis. However, there are no standard environment for rotordynamics, hence the user has to extend the structural model with the rotordynamics effect such as gyroscopic effect and rotordynamical coefficients. By ...

Development of Stress Relief Suspensions for Micro-Machined Silicon Membranes

W. Kronast[1], U. Mescheder[1], B. Müller[1]
[1]Hochschule Furtwangen, Furtwangen, Germany

A new design concept for large (6 mm diameter) dynamically focusing silicon membrane mirrors using electrostatic actuation was realized. With this concept membrane buckling by residual compressive stress inside the membrane can be avoided. To eliminate the influence of residual stress (compressive or tensile) a membrane suspension with a novel stress relief design was developed by the use of ...

Simulating Wear in Disc Brakes - new

N. H. Elabbasi[1], M. J. Hancock[1], S. B. Brown[1]
[1]Veryst Engineering, LLC., Needham, MA, USA

Wear is a complex phenomenon relevant to many problems involving frictional contact, such as mechanical brakes, seals, metal forming, and orthopedic implants. The rate of wear depends on the properties of the contacting materials and operating conditions. One widely used model of wear is Archard’s law, which relates the rate of material removal due to wear to the contact pressure, sliding ...