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.

Multibody Contact Analysis of an Rzeppa CV-Joint

L. Armellin[1], F. Gatelli[1], and G. Tanghetti[1]

[1]R&D Department, Metelli S.p.A., Cologne, BS, Italy

Ball joints are widely used in many applications. This paper describes the contact and kinematic analysis of an Rzeppa type constant-velocity joint (CV-joint). Starting from a conveniently simplified 3D model, at fixed joint angle of 45°, a CV-joint made of all “generic steel” components has been studied. Considering only a “perfect” geometry (i.e. not affected by ...

FEA Mechanical Modeling of Torque Transfer Components for Fully Superconducting Rotating Machines

T. Wu[1], G. Escamez[1], C. Lorin[1], P. J. Masson[1]
[1]University of Houston, Houston, TX, USA

NASA is funding the development of a high-fidelity fully superconducting machine sizing tool able to generate optimized designs based on thrust requirements and design constraints. Several mechanical challenges need to be overcome during the design of the torque transfer components. Reducing the conducted heat load requires the use of different materials in the torque path, which requires ...

MEMS Based Silicon Load Cell for Weighing Applications

D. Chauhan[1], B. D. Pant[2]
[1]Kurukshetra University, Kurukshetra, Haryana, India
[2]CSIR- Central Electronics Engineering Research Institute, Pilani, Rajasthan, India

Load cells are force sensors, which are used in weighing equipment. The objective of this work is to develop MEMS based load cell. In this work two different load cell designs were simulated. First design is based on compressing a meander like polysilicon strain gage for the measurement of high forces up to 10kN. Second design is based on MEMS pressure sensor consisting of membrane, on which ...

Modeling of Residual Stresses in a Butt-welded Joint with Experimental Validation

V. Srivastava [1],
[1] Naval Materials Research Laboratory (NMRL), Defence Research and Development Organization (DRDO), Ambernath, Thane, Maharashtra, India

2D-modeling of arc welding in butt-joint configuration was performed in this study considering thermal-structural interactions. Thermal behavior was modeled in COMSOL Multiphysics® using the Heat Transfer Module with weld heat input as a Gaussian pulse whereas structural behavior using Structural Mechanics Module. Thermal-elastic-plastic behavior model based on Von Mises yield criteria and ...

Birefringence Induced in Optical Rib Waveguides by Thermal and Mechanical Stresses - new

G. Grasso[1], V. M. N. Passaro[1], F. De Leonardis[1]
[1]Photonics Research Group, Politechnic Institute of Bari, Bari, Italy

In this paper a multiphysics approach to study the optical properties of integrated waveguides influenced by thermal and mechanical stress is presented. The heating and pressure effects are evaluated by means the Heat Transfer and Structural Mechanics modules respectively. Finally, the electromagnetics capabilities of the AC/DC Module are used in order to evaluate the optical eigenfunctions and ...

Design of ESS-Bilbao RFQ Linear Accelerator

J. L. Muñoz [1], D. de Cos [1], I. Madariaga [1], I. Bustinduy [1]
[1] ESS-Bilbao, Bilbao, Spain

The design of ESS-Bilbao RFQ (RadioFrequency Quadrupole) linear accelerator cavity using COMSOL Multiphysics is presented. The work includes geometry definition, electrostatics, electromagnetic and thermomechanical coupled simulations. The main part of the work corresponds to the electromagnetic design. Geometry construction and meshing is very challenging, involving large models (3 m long) with ...

Fluid-structure Interaction Modeling of Air Bearing

H.R. Javani[1], P. Kagan[2], F. Huizinga[1]
[1]ASML - MDev – Mechanical analysis, Veldhoven, The Netherlands
[2]ASML - MDev – System Dynamics, Veldhoven, The Netherlands

Air bearings are special type of bearings which provide nearly zero friction between two surfaces. This is achieved by a compressed layer of gas between the surfaces. This study presents a modeling technique for an Air bearing component. COMSOL Multiphysics® is used to efficiently solve a coupled Fluid-Structure Interaction analysis. Computational time is significantly reduced compared to ...

Structural Analysis of the Advanced Divertor eXperiment's Proposed Vacuum Vessel

J. Doody [1], R. Vieira [1], B. LaBombard [1], R. Leccacorvi [1], J. Irby [1], R. Granetz [1]
[1] Plasma Science and Fusion Center - Massachusetts Institute of Technology, Cambridge, MA, USA

The goal of a tokamak is to use high magnetic fields to contain plasma and produce nuclear fusion that can be used for power generation. MIT’s Plasma Science Fusion Center (PSFC) and collaborators are proposing a machine, the Advanced Divertor eXperiment (ADX) to test new technology for these systems at reactor level heat fluxes and magnetic fields. COMSOL Multiphysics® software is used to ...

Novel Simulation of a Voltage-Driven Electro-Thermo-Mechanical MEMS Self-Oscillator

S. Ouenzerfi [1,2,3], H.A.C. Tilmans [2], S. El-Borgi[3,4], X. Rottenberg [2]
[1] KACST-Intel Consortium Center of Excellence in Nano-manufacturing Applications (CENA), Riyadh, KSA
[2] IMEC, Leuven, Belgium
[3] Applied Mechanics and Systems Research Laboratory, Tunisia Polytechnic School, University of Carthage, La Marsa, Tunesia
[4] Texas A&M University at Qatar, Mechanical Engineering Program, Engineering Building, Doha, Qatar

This paper presents the modeling and simulation of electro-thermo-mechanical self-oscillators, an emerging type of M/NEMS-enabled timing devices in which sustaining electronic amplifiers are not required for their operation. Indeed, they realize amplification in the mechanical domain and feedback by crossing three physical domains: electrical, thermal and mechanical. In a previous work [1], we ...

Two-Dimensional FEM Simulation of Ultrasonic Wave Propagation in Isotropic Solid Media using COMSOL

B. Ghose[1], K. Balasubramaniam[2], C.V. Krishnamurthy[3], and A.S. Rao[1]
[1] High Energy Materials Research Laboratory, Pune, Maharashtra, India
[2] Center for Non Destructive Evaluation, Department of Mechanical Engineering, IIT Madras Chennai, Tamil Nadu, India
[3] Department of Physics, IIT Madras,Chennai, Tamil Nadu, India

Ultrasonic Testing (UT) is one of the important Non-Destructive Evaluation (NDE) technique widely used for characterisation of materials as well as detection and characterisation of flaws present in the material used in various industries. There are many different important materials like metals, metallic alloys, rubber, composites etc used in aerospace industries is being inspected using UT as ...