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.

A Flexible Scheme For Numerical Homogenisation In Linear Elasticity

A. Gerisch[1], S. Tiburtius[1], Q. Grimal[2], and K. Raum[3]
[1]Technische Universität Darmstadt, Germany
[2]Université Pierre et Marie Curie Paris VI, France
[3]Charité-Universitätsmedizin Berlin, Germany

Musculoskeletal mineralised tissues (MMTs), like bone or tendon, are a prime example of naturally occuring, hierarchically structured material. They display a great variety in mechanical function but are all based on essentially the same building block: the mineralised collagen fibril (100 nanometer in diameter). This building block is arranged in various spatial structures across many length ...

Modeling of Chemo-Mechanical Coupled Behavior of Cement Based Material

D. Hu[1], F. Zhang[2], H. Zhou[3], and J. Shao[1]
[1]LML, UMR8107, CNRS, University of Lille I, Lille, France
[2]School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, China
[3]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China

A lixiviation-mechanical coupled model is developed for fiber reinforced concrete within this framework; both the influence of chemical degradation on short and long term mechanical behavior and the influence of mechanical loading on the diffusion coefficient can be considered. The elastic mechanical properties are written as function of chemical damage. A Drucker–Prager typed criterion with ...

Multiphysics Software Applications in Reverse Engineering

W. Wang[1], K. Genc[2]
[1]University of Massachusetts, Lowell, MA, USA
[2]Simpleware, Exeter, United Kingdom

During the past decade reverse engineering has become a common and acceptable practice utilized by many aftermarket suppliers, and even original equipment manufacturers (OEM). This presentation focuses on the applications of multiphysics software such as COMSOL and Simpleware® in reinventing the design details and manufacturing processes of an existing part in the absence of the original design ...

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 ...

Simulation of Cellular Traction Force Based Deflection of PDMS Micropillars - new

J. Wala[1], D. Maji[1], S. Dhara[1], S. Das[1]
[1]Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India

Cells are complex entities which not only passively sense external stimuli (viz. chemical, optical or mechanical) but also interact with extracellular matrix (ECM) by regulating cellular behavior such as growth, proliferation, migration, etc. Monitoring cell growth and migration of adherent cells becomes a crucial factor in determining cell-cell and cell-substrate interaction, important for ...

A predictive model for the micro-porosity quantitative in Al-Si alloy

Battaglia, J.L., Rozot, J.M.
France

The fatigue is the most important criterion for the securities parts (brake system for example). The increasing use of shaped cast aluminium in the security automotive parts has focused interest on the fatigue of theses alloys. The specific foundry software use empirical laws that do not fit with the reality, above all concerning the aluminium alloys. We proposed a new physical parsimonious ...

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 ...

Modelling of Layered Rocks with COMSOL Multiphysics

M.A. Rojas[1], and V. Grechka[2]
[1] University of Houston
[2] Shell International E&P

We present static and dynamic computations of the apparent properties for stacks of horizontal isotropic layers (VTI symmetry). The effective stiffness tensors of such media are given by the Backus theory for statics in the limit of zero thicknesses of the constituent layers. We used COMSOL Multiphysics to verify the theoretical static bounds for these effective stiffnesses.

Numerical and Experimental Analysis of Natural and Mixed Convection Heat Transfer for Vertically Arranged DIMM

G. Petrone, and G. Cammarata
University of Catania, Catania, Italy

 It is commonly recognized that careful thermal design of electronic equipments represents an unavoidable pre-production step in order to ensure reliability and performance of those components during their functioning. This paper mainly concerns a comparison between experimental and numerical results obtained in studying thermal dissipation in natural and mixed convection conditions for RAM ...

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