J. Anza, and M. Esteves
Department of applied mathematics, University of the Basque Country, Bilbao, Spain
University of the Basque Country, Bilbao, Spain
This work deals with the computer simulation of the blood flow, the arterial wall deformation and their 3D bidirectional interaction, including initial stresses and root displacements. The flow is laminar and steady with flexible walls modeled with a hyperelastic Demiray material model. Poiseuille formula is used to check the bidirectional interaction. 2D axisymmetric and full 3D models have ...
Numerical Modelling Of Moisture Related Mechanical Stress In Wooden Cylindrical Objects Using COMSOL: A Comparative Benchmark
H. Schellen, and J. Van Schijndel
Eindhoven University of Technology, Eindhoven, The Netherlands
For preservation of artefacts in a museum the indoor climate is often restricted to a very narrow interval for temperature, but most of all for relative humidity. In old buildings the museum conditions of artefacts, e.g. near cold walls, mostly are not in line with museum recommendations.To have an impression of indoor museum climates in old buildings, a large number of case studies were carried ...
E. Firat, P. Beckhaus, and A. Heinzel
Zentrum für BrennstoffzellenTechnik (ZBT)
A fuel cell stack is a setup of a number of single fuel cells which have to be mechanically compressed each other to ensure good electrical conductivities and tightness against leakage of supplying gases (e.g. hydrogen) and cooling media. In this study a 3D FEM model is developed with COMSOL Multiphysics® to analyze the mechanical design of a fuel cell stack. The material properties of the ...
V. Pini, J. J. Ruz Martinez, E. Gil, M. Calleja, and J. Tamayo
Instituto de Microelectrónica de Madri
The detection back-action phenomenon has received little attention in physical, chemical, and biological sensors based on nanomechanical systems. We show that this effect is very significant in ultrathin bimetallic cantilevers, in which the laser beam that probes the picometer scale vibration largely modifies the resonant frequencies of the system. The light back-action effect is nonlinear, ...
A. Gerisch, S. Tiburtius, Q. Grimal, and K. Raum
Technische Universität Darmstadt, Germany
Université Pierre et Marie Curie Paris VI, France
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 ...
W. L. Wang, W. H. Liao, and C. G. Zeng
Department of Mechanical Design Engineering, National Formosa University
Though used widely in weight measurement, load cell’s theory is tedious enough to practice. This paper explains and discusses how strain gauges and Wheatstone Bridges work, both of which are important components of the load cell. COMSOL Multiphysics applied to analyze the deformation of load cells, yields an accurate result verified by experiments, and demonstrates that a good load cell design ...
M.E. Karagozler, and S.C. Goldstein
Carnegie Mellon University, Pittsburgh, PA, USA
In this work, we describe the design of a new type of microrobot, the Catom, which is the basic unit of the modular robotic system Claytronics. The Catom is an autonomous, free standing, three dimensional microrobot, which uses electrostatically coupled electrodes to harvest power, actuate, and adhere to other robots. The Catoms are fabricated using lithography based fabrication techniques. The ...
R.D. Costley, H. Diaz-Alvarez, and M.H. McKenna
U.S. Army Corps of Engineers, Washington, DC, USA
Large infrastructure, such as bridges, emits signals at their natural or driven frequencies of vibration, providing an indication of the structural condition that can be monitored without a need to physically touch the structure. In this presentation, a benchmark case for the transient excitation of a simple structure is investigated: the COMSOL and analytical solutions are compared for the ...
Center for Product Development, Mads Clausen Institute, South Danish University, Denmark
This paper will give a short overview of use of COMSOL Multiphysics for analyzing ancient Greek and Roman catapults with the main focus on the energy storing torsion springs. Catapults have been known and used in the Greek and Roman world from around 399 BC and a fully standardized design for powerful torsion catapults emerged around 270 BC, based on one basic factor, the diameter of the torsion ...
J. P. Müller, and T. E. Schäffer
Institute of Applied Physics
University of Erlangen-Nuremberg
One method for investigating the mechanical properties of samples like living cells with an Atomic Force Microscope (AFM) is driving force-curves, i.e. measuring the force applied by the tip of the AFM as a function of the indentation into the sample. By fitting a Hertz-model, which predicts the applied force as a function of the indentation depth, one can infer the elastic modulus of the ...