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Glass Transition of ABS in 3D Printing

M. Rahman [1], N. R. Schott [2], L. K. Sadhu [3],
[1] North South University, Dhaka, Bangladesh
[2] Department of Plastics Engineering, University of Massachusetts - Lowell, Lowell, MA, USA
[3] IRays Teknology Ltd., Dhaka, Bangladesh

In a commercial 3D printer head, plastic ribbon passes through a hot nozzle of an extruder to dispense liquid plastic droplets to construct the model. In this paper a 2D axisymmetric model of a 3D head is considered to study the secondary transition change from below the glass ... 詳細を見る

Simulation and Testing of a Tunable Organ Pipe for Ocean Acoustic Tomography

A. K. Morozov [1],
[1] Teledyne Technologies Inc., Falmouth, MA, USA

Teledyne Marine developed a system for the long-range ocean acoustic tomography, which uses a tunable, high-efficiency sound resonator. The high-Q resonator tunes to match the frequency and phase of a reference frequency-modulated signal. The analysis of a high-Q resonant organ pipe with ... 詳細を見る

A Virtual Laboratory for the 4 Bed Molecular Sieve of the Carbon Dioxide Removal Assembly

R. Coker [1], J. Knox [1], B. O'Connor [1],
[1] Marshall Space Flight Center - NASA, Huntsville, AL, USA

Introduction: Ongoing work to improve water and carbon dioxide separation systems to be used on crewed space vehicles combines sub-scale systems testing and multi-physics simulations. Thus, as part of NASA’s Advanced Exploration Systems (AES) program and the Life Support Systems ... 詳細を見る

Finite Element Modeling of MEMS Chevron Thermal Actuators for Strain Engineering of Graphene

M. Vutukuru [1], J. Christopher [2], B. Goldberg [1,2], D. Bishop [1,2,3], A. Swan [1,2,3]
[1] Department of Electrical and Computer Engineering, Boston University, Boston, MA, USA
[2] Department of Physics, Boston University, Boston, MA, USA
[3] Division of Material Science Engineering, Boston University, Boston, MA, USA

Graphene, a single layer of carbon atoms, has demonstrated extremely high electric and thermal conductivities, tensile strength, and is therefore an exciting novel building block in the world of 2D flexible electronics. We propose the integration of graphene with MEMS devices to ... 詳細を見る

Maximizing the Fatigue Crack Response in Surface Eddy Current Inspections of Aircraft Structures

C. Mandache [1], T. Theodoulidis [2],
[1] National Research Council Canada, Ottawa, ON, Canada
[2] University of Western Macedonia, Kozani, Western Macedonia, Greece

In-service detection of fatigue cracking in metallic aerospace structures relies on capable and efficient eddy current inspection procedures. For best results, inspections with surface scanning eddy current techniques are following rigorous procedures that indicate the instrument ... 詳細を見る

Modeling the Acoustic Scattering from Objects Buried in Porous Sediment Using COMSOL Multiphysics® Software

A. Bonomo [1], M. Isakson [1],
[1] Applied Research Laboratories, The University of Texas at Austin, Austin, TX, USA

A frequency-domain finite element (FE) technique for computing the acoustic scattering from axially symmetric fluid-loaded structures subject to a nonsymmetric forcing field based on Ref. 1 is extended to poroelastic media and implemented in COMSOL Multiphysics® software. This method ... 詳細を見る

Theoretical and Experimental Validation of Micro Hot Embossing on Polymeric Substrates

F. Lai [1], N. K. Shivaprakash [1], J. Zhang [1], A. Panwar [1], J. Mead [1], C. Barry [1], Q. Truong [2],
[1] University of Massachusetts Lowell, Lowell, MA, USA
[2] US Army Natick Soldier Research, Development and Engineering Center, Natick, MA, USA

Micro hot embossing on a large area polymeric substrates using roll-to-roll (R2R) mode has been considered as one of the most promising technologies that can offer continuous fabrication of large area polymeric substrates. Besides continuous operation, roll-to-roll (R2R) process offers ... 詳細を見る

A COMSOL Multiphysics® Software Analysis of Beam Tube Cooling in the High Flux Isotope Reactor of ORNL

J. D. Freels [1],
[1] Research Reactors Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA

Previous to the present work, a formal calculation was approved [1,2] to support the operation of the High Flux Isotope Reactor (HFIR) Horizontal Beam-Tube 1 of 4 (HB-1). The present calculation [3,4] repeats the previous work using COMSOL Multiphysics® software and extends the analysis ... 詳細を見る

Multiphysics Analysis of RF Cavities for Particle Accelerators: Perspective and Overview

M. Awida [1],
[1] Fermi National Particle Accelerator Laboratory, Warrenville, IL, USA

Particle accelerator technology evolves gradually towards improving reliability and efficiency of the accelerator machines, which would reduce their cost for current applications and even make them more accessible to new industrial applications. RF cavities are utilized in particle ... 詳細を見る

Genetic Algorithm for Geometry Optimization of Optical Antennas

R. Diaz de Leon [1], G. Gonzalez [1], A. G. Rodriguez [1], E. Flores [2], F. J. Gonzalez [1],
[1] Universidad Autonoma de SLP, San Luis Potosi, S.L.P., Mexico
[2] Instituto Tecnologico de SLP, San Luis Potosi, S.L.P., Mexico

A genetic algorithm was programmed in MATLAB® software and linked to the COMSOL Multiphysics® software with the COMSOL LiveLink™ for MATLAB® to optimize the geometry of an optical antenna (nanoantenna). The proposed computational model demonstrated that nanoantenna geometries does not ... 詳細を見る

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