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.

Elastoplastic Modeling and Experimental Verification of Solder-Substrate Interaction - new

C. Karl[1], C. Slater[1], M. Strangwood[1], K. Tank[2], S. O'Connor[2]
[1]University of Birmingham, Birmingham, UK
[2]Strip Tinning Ltd, Birmingham, UK

Solders are typically used to join similar or dissimilar metals, referred to as substrates. In some cases solders are also used to join completely different classes of materials. For example, a joint between copper busbar and silicon solar cell represents a set of dissimilar substrates. In the formation of a solder-substrate couple, the system must have been subjected to at least a single ...

On the Geometric Nonlinearity Effects of Polymeric Plates on Structural Performance - new

K. Vakkund[1], R. C. Thiagarajan[1]
[1]ATOA Scientific Technologies Pvt. Ltd., Bengaluru, Karnataka, India

Polymer sheets are widely used for glazing and roofing structural applications. The primary design requirements of these polymeric sheets are to resist uniformly distributed wind loading. Conventional building materials such as steel and glass plates are relative stiffer compared to polymeric sheets. The deflection of high stiff plates is about an order lower than polymeric plates. Polymeric ...

A Numerical Model for Transient Heat Conduction in Semi-Infinite  Solids Irradiated by a Moving Heat Source

N. Bianco[1], O. Manca[2], S. Nardini[2], and S. Tamburrino[2]
[1]Dipartimento di Energetica, Termofluidodinamica applicata e Condizionamenti ambientali, Università degli Studi Federico II, Napoli, Italy
[2]Dipartimento di Ingegneria Aerospaziale e Meccanica, Seconda Università degli Studi di Napoli, Aversa (CE), Italy

A numerical analysis on transient three-dimensional temperature distribution in a semi-infinite solid, irradiated by a moving Gaussian laser beam, is carried out numerically by means of the code COMSOL Multiphysics. The investigated workpiece is simply a solid. A laser source is considered moving with constant velocity along the motion direction. The convective heat transfer on the upper surface ...

Elasto-Plastic FEM Models Explain the Emplacement of Shallow Magma Intrusions in Volcanic Complexes

A. Bistacchi[1]
[1]Università degli Studi di Milano Bicocca, Milano, Italy

We present numerical models and field data that aid understanding of volcano-tectonic processes related to the propagation of inclined sheets and dykes under a stress field resulting from the inflation of a shallow magma chamber. Structural field data from the classical Cuillins cone-sheet complex (Isle of Skye) show that sheets have a constant average dip angle (45°), with pure dilational or ...

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 ...

Prediction of Temperature and Thermal Stress in Plasma Sprayed Coatings - new

M. Raja[1] , G. Hiremath[1], K. Ramachandran[1], P.V.A. Padmanabhan[2], T.K. Thiyagarajan[2]
[1]Karunya University, Coimbatore, Tamil Nadu, India
[2]Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Plasma spraying is one of the prominent technologies for wear, corrosion and high temperature resistant coatings. The coating quality is very important to increase the performance of the components as well as to protect the outer surface of the component from external environment. The coating quality characteristics depend on many plasma process parameters. Among these parameters, distribution of ...

Design of Soft Actuators using Ionic Polymer Metal Composites

D. M. G. Preethichandra1, B. G. L. T. Samaranayake2, A. M. U. S. K. Alahakoon2 and K. Kaneto1
1Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Hibikino, Wakamatusu-Ku, Kitakyushu-Shi, Japan
2Department of Electrical and Electronics Engineering, Faculty of Engineering, University of Peradeniya, Peradeniya, Sri Lanka

This paper characterizes and models the bending motion of the strip-type Ionic Polymer Metal Composites (IPMC) actuators using the theory of Large Deflections of Beams. From here it derives a thermal analogy. The mathematical model has been experimentally verified for an actuator with the dimensions 25mm×2.6mm×0.44 mm.Theoretical and experimental results are compared to show the validity of the ...

Defining the stress fields for the safety design of the LBT adaptive secondary mirror - FEMLAB/MATLAB set of functions to define and compute shell overstressing

Del Vecchio C., Busoni L., Riccardi, A.
INAF-OAA

This paper presents the most important safety issues of the thin glass shell of the LBT Adaptive Secondary Mirror. Two overstressing conditions are investigated: the condition in which the mirror shell is passively supported and the condition of a failure of the control system governing the actuator forces. The two stress analyses determine the portion of the mirror which may exceed a certain ...

A Numerical Study for Rubber Particles Collection Involved in New Thermoforming Composite Process Using COMSOL Multiphysics®

R. Carbone[1], V. Antonelli[2][3], A. Langella[1], and R. Marissen[3]

[1]Material and Production Engineering Department, Università degli Studi di Napoli Federico II, Napoli, Italy
[2]Institute of Lightweight Structures, Technische Universität München, München, Germany
[3]Design and Production of Composite Structure, Delft University of Technology, Delft, The Netherlands

This paper deal of the forming process applied to the thermoplastic composites. A new thermoforming process that uses rubber particles collection as flexible mould was presented and numerically modeled. A characterization of the rubber in particles form was previously performed to value the material parameters in the user-defined hyperelastic constitutive laws employed in the FEM (Finite Element ...

Stress Field Simulation for Quantitative Ultrasound Elasticity Imaging

L. Yuan[1] and P.C. Pedersen[1]
[1]Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts, USA

Finite element models using COMSOL Multiphysics and MATLAB were developed to solve the problem of stress distribution interior homogeneous, isotropic, incompressible elastic solid material under known vertical external compression with a rectangular contact surface. Moreover, comparison between these results and analytical solutions was used to further validate that stress drops off with ...

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