K. B. Matos , I. Neitzel ,
 FATEB, Telêmaco Borba, PR, Brazil
The liquid food product packaging are today predominantly made with board LPB type board (Liquid Packaging Board) composite formed by board, which offers mechanical strength, polyethylene, constituent responsible for protection against the passage humidity, and aluminum foil, which helps protect against oxygen flow. On the day, paper and board are words used as synonyms for each other. ...
Design Geometry Optimization of Vertical Cracks in Thermal Barrier Coatings from Simulated Thermal and Mechanical Behavior
C. Heveran, J. Xu, D. Cole, S. Basu, V. Sarin
Division of Materials Science and Engineering, Boston University, Brookline, MA, USA
Department of Mechanical Engineering, Boston University, Brookline, MA, USA
Turbine blades are coated with thermal barrier coatings (TBCs) to reduce operating temperature. TBCs experience stress from coefficient of thermal expansion mismatch with the bond-coat and substrate. Vertical cracks are thought to offer stress relief, but influence of crack geometry on TBC thermal and mechanical properties is not well understood. A two-dimensional, steady-state model is employed ...
Time-Dependent Thermal Stress and Distortion Analysis During Additive Layer Manufacturing, by Powder Consolidation by Laser Heating
M.S. Yeoman, J. Sidhu
1. Continuum Blue Ltd., Tredomen Innovation & Technology Park, Tredomen, Ystrad Mynach, United Kingdom
BAE Systems, Advanced Technology Centre, Bristol, United Kingdom
A time-dependent COMSOL Multiphysics model of an additive manufacture process, which uses powder consolidation by laser heating was developed, providing a platform to better understanding the manufacture process & provide a tool to reduce resulting distortion & optimization of an additive manufacture process. The model simulates a high intense laser energy source moving along a pre-defined time ...
M. Alshareef, A. Alshareef, V. Krishna, M. Kindy, T. Shazly
College of Medicine, Medical University of South Carolina, Charleston, SC, USA
Department of Biomedical Engineering, Duke University, Durham, NC, USA
Department of Neurosurgery, Medical University of South Carolina, Charleston, SC, USA
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 ...
J. D. Freels, P. K. Jain, C. J. Hurt
Oak Ridge National Laboratory, Oak Ridge, TN, USA
The University of Tennessee, Knoxville, TN, USA
Our safety analysis group in the Research Reactors Division of Oak Ridge National Laboratory supports a project to investigate the production of Pu-238 isotope for missions of deep space travel in the High Flux Research Reactor. COMSOL Multiphysics® has been used to support this activity in the past, and we have successfully installed and irradiated three different target designs. The gas-gap ...
National Centre for Advanced Tribology at Southampton, University of Southampton, Southampton, United Kingdom
An incremental wear model has been developed using COMSOL Multiphysics® with MATLAB® to predict the evolution of component geometry as a result of wear. Whilst Archard’s wear law is a well-known empirical model for the prediction of wear volume, the design engineer is interested in changes in tolerance as a result of component geometry. At each time step, the simulation extracts the pressure ...
P. Olsson, F. Larsson, A. Khlopotin, S. Razanica
Chalmers University of Technology, Gothenburg, Sweden
In solid mechanics, there is considerable interest in achieving “invisibility”. The applications in mechanics include protection of structures and parts of structures from potentially harmful transient waves and steady state vibrations. A suggested large scale application is that protection against seismic waves from earthquakes could be achieved by using cloaking to re-route the waves around ...
E. Aguayo, R. Lyon, M. Helmbrecht, S. Khomusi
The Newton Corporation, Bowie, MD, USA
NASA Goddard Space Flight Center, Greenbelt, MD, USA
Iris AO, Inc., Berkeley, CA, USA
Microelectromechanical systems (MEMS) are becoming more prevalent in today’s space technologies. The Visible Nulling Coronagraph (VNC) instrument, being developed at the NASA Goddard Space Flight Center, uses a MEMS Mirror to correct wavefront errors. This MEMS, the Multiple Mirror Array (MMA), will enable the VNC instrument to detect Jupiter and ultimately Earth size exoplanets. The MMA ...
A. Genoese, A. Genoese, and G. Garcea
Dipartimento di Modellistica per l'Ingegneria, Università della Calabria, Arcavacata di Rende, CS, Italy
Saint-Venant general rod theory is used to calculate the elastic factors of a section through the numerical solution of a system of partial differential equations. The elastic properties so evaluated are used in a geometric nonlinear analysis of 3D beam structures with general cross-section to calculate some important quantities such as the stiffness matrix. Linear solutions, such as the Saint ...
Numerically Closing the Loop of the Adaptive Optics Sensor: the Validation of the COMSOL Multiphysics® Simulation - new
C. Del Vecchio, R. Briguglio, A. Riccardi
National Institute for Astrophysics, Arcetri Astrophysical Observatory, Florence, Italy
As any other modelling of a physical behavior, the numerical simulation of the mechanical response of an adaptive secondary mirror requires that the results match the experimental data. Such an agreement was recently demonstrated for the local mirror stiffness of the LBT and VLT Deformable Mirrors; a reliable modeling is a good tool for the extrapolation of the missing optical data (spider ...