E. Gutierrez-Miravete, W. L. Saunders II, K. Pendley
Rensselaer at Hartford, Hartford, CT, USA
General Dynamics Electric Boat, Groton, CT, USA
United Technologies - Pratt & Whitney, East Hartford, CT, USA
The determination of the modes of vibration of Functionally Graded-Metal-Ceramic Composite plates is important in practice in order to prevent undesired resonances in structural components. This paper describes the application of COMSOL Multiphysics® software for the determination of the modes of vibration of Aluminum A356-T6Alloy-ZrO2 FG-MCC square plates.
P. K. Bahumanyam
University of Alabama in Huntsville, Huntsville, AL, USA
Viable design alternative for the existing and fast growing UAVs which are optimized for unmanned flight is of great demand. Designing of a small scale UAV alternative to the AAI Aerosonde UAV has been considered changing the wing tail configuration of the vehicle analyzing both structural and aerodynamic performance improvements using COMSOL Multiphysics® software.
SPAWAR Systems Center (SSC) ATLANTIC, Charleston, SC, USA
Additive manufacturing uses 3D printing to build physical parts from CAD-based designs. The technology includes fused deposition modeling (FDM) and selective laser sintering (SLS) methods. 3-D printing is of particular interest for smaller, one-of-a-kind, customizable products. A cube satellite (CubeSat) containing fiber reinforced SLS parts has been successfully launched (Ref 1). Lower ...
Electro-Thermo-Mechanical Finite Element Modeling to Investigate the Reliability of Automotive MOSFET Transistor
T. Azoui, P. Tounsi, and J.M. Dorkel
CNRS, LAAS, Toulouse, France
3D electro-thermo-mechanical finite element model of power vertical MOSFET used in the automotive industry is presented in this paper. The presented paper is a qualitative study of power device results from electro-thermo-mechanical simulation. This study particularly interested in the stress generated at the interface between the bonding wires and the source metallization to evaluate the ...
Z. Zheng, R. Zhang
Corning Incorporated, Corning, NY, USA
Introduction: Glass relaxation occurs in a range of temperature during transition from equilibrium to super-cooled liquid. Viscoelastic material model can be applied to simulate glass behavior during the glass transition regime and to predict the glass deformation and stress evolution. Viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when ...
Georg-August University, Göttingen, Germany
Energy piles, i.e. heat exchangers located within the foundation piles of buildings, are used for heating of cooling purposes. Although the absolute values of deformations and temperature gradients are low or moderate, the entire setting can be influenced by thermo-hydro-mechanical coupling. The fluctuating thermal regime may affect the deformation of pile and surrounding ground as effect of ...
H. T. Mengistu, A. García-Cristóbal
Material Science Institute, University of Valencia, Valencia, Spain
The possibility to dispose of two-dimensional (2D) approaches to problems originally posed in a three-dimensional (3D) geometry is always desirable since it reduces significantly the computing resources needed for numerical studies. In this work we report on a new 2D approach called Generalized Plane Piezoelectric (GPP) problem  and apply it to the calculation of the strain and electric fields ...
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, ...
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 ...
F. Noto, M. Piscopo, L. Celona, D. Cittadino, S. Gammino, G. Cuttone, G. Gallo, G. Schillaci, C. Campisano, L. Lo Nigro, G. Costa, A. Campisano
Laboratorio Nazionale del Sud, Santa Sofia, Catania, Italy
Gravina di Catania, Sicily, Italy
Trinacria, Canalicchio, Catania, Italy
Unico Informatica, li Battiati, Catania, Italy
Different facilities for hadrontherapy have been built in the recent past. AISHa ion source has been designed by keeping in mind the typical requirements of hospital-based facilities, where the minimization of the mean time between failures (MTBF) is a key point together with the maintenance operations which should be fast and easy. The study of some critical parts of the facilities: the ...