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.

基于 ALE 方法的脉冲磁体不可逆电感变化计算

蒋帆 [1], 孙衢骎 [1],
[1] 武汉脉冲强磁场中心,武汉,湖北,中国

目前,脉冲磁体广泛采用导体绕组和加固材料分层交替绕制的工艺(内部层间加固),以提高磁体的整体结构强度。磁体在长期的放电工作过程中,反复经历强电磁力的作用,导体材料(一般为纯铜、铜基合金以及铜基复合材料)在重复的加卸载过程中存在着塑性应变的累积效应,即棘轮效应。导体材料塑性应变的逐渐累积,导致了磁体不可逆电感值的不断增加。因此,磁体的不可逆电感变化可表征磁体内部的整体变形情况,可用于脉冲磁体的疲劳失效预测。 本文基于 COMSOL Multiphysics® 5.1 软件,对脉冲磁体的放电过程建立了电路、电磁场、温度场及结构场的二维轴对称全耦合模型。考虑了放电过程中集肤效应对磁体电阻、电感的影响;在结构场中引入了接触对,采用罚函数法对磁体内部的层间分离机制进行了有效的模拟;利用耦合变量,基于 ALE 方法计算了脉冲磁体在服役过程中 ...

Modeling of Viscoelastic Phenomena in Concrete Structures

A. Pomarico [1], G. Roselli [1], D. Caltabiano [2],
[1] STMicroelectronics, Lecce, Italy
[2] STMicroelectronics, Agrate, Italy

A growing demand is recently emerging of sensors to be integrated in the concrete in order to measure some critical parameters, such as humidity and temperature and the internal pressure of the material. For example, by monitoring the pressure in various strategic points of the structure and their evolutions over time it is possible to understand the health of the structure and the needs for ...

Study of Fracture Parameter for Curved Cracked Bimodular Flexural Specimen Using COMSOL Multiphysics® Software

A. Bhushan [1], S.K. Panda [1],
[1]Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh, India

The formulation of bimodular stress field is based on stress dependent elasticity and the simulations have been carried out using commercial finite element software COMSOL Multiphysics® software. The complexity of the problem is enhanced due to adding bimodular stress field in the evaluation of complex J-integral ( ˆ F J ) for curve cracked geometry subjected to flexural loading. The complex J ...

Study of Thermal Behavior of Thermoset Polymer Matrix Filled with Micro and Nanoparticles

B. Reine[1], J. Di-Tomaso[2], G. Dusserre[1], P. Olivier[1]
[1]Université de Toulouse, UPS, INSA, Mines Albi, ISAE, ICA, IUT, Dept. GMP, Toulouse Cedex, France
[2]RESCOLL - Société de Recherche, Pessac Cedex, France

This paper addresses the study of thermal behavior of thermoset polymer matrix filled with microparticles. A numerical model was developed with COMSOL Multiphysics to get a random spatial distribution of fillers in a representative volume element (RVE). This model was then compared to an analytical reference model (Hamilton model) and experimental results. This comparison highlights a good ...

Analysis of a Plasma-Mediated Photoacoustic Response From Plasmonic Nanoparticles in Ultrashort Regime

A. Hatef [1], B. Darvish [1], A. Dagallier [2], C. Boutopoulos [2], M. Meunier [2],
[1] Nipissing University, North Bay, ON, Canada
[2] École Polytechnique de Montréal, Montréal, QC, Canada

Over the last decade, plasmonic nanoparticles (PNPs) have received growing interest as exogenous contrast agents in the thermal expansion based photoacoustic (PA) imaging technique in biomedical applications [1]. Such functionality is due to the localized surface plasmon resonance (LSPR) created by the light-induced coherent oscillation of the conduction electrons in the PNPs. In the near-field ...

Dynamic Deformation of Soft Particle in Dual-trap Optical Tweezers

Y. Sheng[1], S. Rancourt-Grenier[1], P. Bareil[1], P. Duval[1], M. Wei[2], A. Chiou[2], and J. Bai
[1]University Laval, Quebec, QC, Canada
[2]National Yang-Ming University, Taipei, Taiwan

A dual-trap optical tweezers is used for deforming the red blood cell (RBC) in suspension and studying its elasticity. The 3D deformation of the cells was computed with the elastic membrane theory. The calculated deformation can fit to experimental data resulting in cell’s elasticity coefficient. The static approach is valid only for small deformation (5-10%). For a large deformation such as ...

Design of a Pressure Sensor to Monitor Teeth Grinding

I.M. Abdel-Motaleb[1], K. Ravanasa[1], K.J. Soderholm[2]
[1]Department of Electrical Engineering, Northern Illinois University, DeKalb, IL, USA
[2]Department of Restorative Dental Sciences, College of Dentistry, University of Florida, Gainesville, FL USA

Studying teeth grinding behavior and other oral conditions requires the ability to accurately measure the pressure on the teeth. Placing a sensor in the mouth requires small size devices with powering and measurement techniques that do not hinder the normal life of the patient. To meet these requirements, we designed, using COMSOL, a small, easy to read MEMS capacitive force sensor, with ...

Field Joint Coatings for Deep Sea Pipelines - new

R. Verhelle[1], L. Van Lokeren[1], S. Loulidi[1], H. Boyd[2], G. Van Assche[1]
[1]Physical Chemistry & Polymer Science, Vrije Universiteit Brussel, Brussels, Belgium
[2]Heerema Marine Contractors, Leiden, The Netherlands

COMSOL Multiphysics® software is used to model the field joint application process on carbon steel pipelines for deep sea crude oil transportation, taking into account not only heat transfer, cure kinetics, and crystallization, but also thermal, cure and crystallization shrinkage and the resulting interfacial thermal stresses. Experimental data from the raw materials are implemented in the model ...

Modeling of Vickers indentation of TiAl alloys

G. Maizza, and R. Cagliero
Politecnico di Torino, Corso Duca degli Abruzzi 24, Torino, Italy

Instrumented indentation is increasingly used as an alternative non-destructive test method to measure mechanical properties of small volumes of materials. In this work, the instrumented indentation test is applied as a non-destructive method to assess the mechanical properties of TiAl components during the setup of a real production process. This study is a preliminary contribution devoted to ...

Design and Analysis of Microcantilevers for Sensor Applications

R. Phadke [1], R. Pramodhini [1], A. Tiwari [2],
[1] Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India

In this report, we present the design and analysis of microcantilevers of various shapes and materials for different applications. Here we investigate the sensitivity i.e. amount of bending of the cantilever due to same amount of force applied to each of the shape and the respective material using COMSOL Multiphysics software. In this context, we are restricted to the use of microcantilevers in ...