Parametric Study of Polyimide - Lead Zirconate Titanate Thin Film Cantilevers for Transducer Applications
A. Arevalo, I.G. Foulds
King Abdullah University of Science and Technology, Thuwal, Kingdom of Saudi Arabia
The simulation of the piezoelectric actuation of the micro-cantilever is presented. Lead Zirconate Titanate (PZT) was chosen for the device fabrication design, due to its thin film processing flexibility. Four layers compose the cantilever structures presented in this work: PZT (piezoelectric material), Platinum (electrodes) and Zirconium Oxide as the buffer layer for the PZT film and polyimide ...
K. C. Koppenhoefer, J. Thomas, J. S. Crompton
AltaSim Technologies, LLC., Columbus, OH, USA
Computational tools based on the finite element method have been used extensively to develop solutions for elastic and elastic-plastic fracture mechanics problems. This work uses a small-scale yielding model to compare results developed from COMSOL Multiphysics® with another finite element modeling package and analytical solutions. Analysis are conducted for elastic, and elastic-plastic ...
N. Elabbasi, J. Bergstrom, and S. Brown
Veryst Engineering, LLC.
Peristaltic pumping is an inherently nonlinear multiphysics problem where the deformation of the tube and the pumped fluid are strongly coupled. We used COMSOL Multiphysics to investigate the performance of a 180 degree rotary peristaltic pump with two metallic rollers, and an elastomeric tube pumping a viscous Newtonian fluid. The model captures the peristaltic flow, the flow fluctuations ...
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 ...
T.H. Tan, S.J.N. Mitchell, D.W. McNeill, H. Wadsworth, S. Strahan
Queen's University Belfast, Belfast, United Kingdom
Schrader Electronics Ltd, Antrim, United Kingdom
The piezoresistance effect is defined as change in resistance due to applied stress. Silicon has a relatively large piezoresistance effect which has been known since 1954. A four point bending setup is proposed and designed to analyze the piezoresistance effect in p-type silicon. This setup is used to apply uniform and uniaxial stress along the crystal direction. The main aim of this work is to ...
H. Schmidt[1,2], and J. Hattel
Technical University of Denmark, Kgs. Lyngby, Denmark
HBS Engineering, Frederiksberg, Denmark
Two friction stir welding models are presented – a global thermal model using the temperature dependent heat source and a local material flow and heat generation model allowing for detailed investigation of different contact conditions. The two models are coupled into a larger local-global model. The flow model includes frictional dissipation from the contact between the work piece and the ...
Z. Hasan, F. Darwish, and S. Al-Absi
Texas A&M University, College Station, TX, USA
Jordan University of Science and Technology, Irbid, Jordan
The main objective of the present work is to perform stress analysis on composite laminates under unaxial/biaxial loading to serve as a preliminary data for test verification. A detailed calculation based on the Classical Lamination Theory was performed for a laminate. The material used was carbon/epoxy applying a pure uniaxial load followed by a biaxial load. It was observed that the failure ...
A. Chidley, F. Roger, and A. Traidia
ENSTA Paristech, Palaiseau, France
Nowadays, to go along with sustainable development and for cost matters, automotive heat exchangers are built with less and less aluminum and the process costs are being cut. However, the real mechanical response is a plastic shakedown, which is why we need to model the cyclic response as well as to find a fatigue criterion. A finite element model was developed using COMSOL Multiphysics to ...
Scale-up Design of Ultrasound Irradiator for Advanced Oxidation Process (AOP) Using COMSOL Multiphysics® Simulation
The Ohio State University, Columbus, OH, USA
Ultrasound is a promising green technology for the advanced oxidation process (AOP) since it adds no chemicals to the treated water. In this paper, COMSOL Multiphysics® was used as a tool to design and characterize an ultrasound irradiator with multi-stepped configuration, which aims to overcome disadvantages of typical irradiators and to enhance contaminant removal in large-scale water ...
Finite Element Modeling of a Pulsed Spiral Coil Electromagnetic Acoustic Transducer (EMAT) for the Testing of Plates
R. Dhayalan, A. Kumar, B. Purnachandra Rao, T. Jayakumar
Metallurgy and Material Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India
Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India
Ultrasonic Measurements Section, Nondestructive Evaluation Division, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603 102, TN, India
This paper presents numerical simulation of plate wave modes in thin stainless steel plates using a racetrack spiral coil electromagnetic acoustic transducer (EMAT), which works under the principle of acousto-elastic effect, called Lorentz force mechanism. EMATs are useful for non-contact ultrasonic nondestructive testing (NDT) of metallic materials for detecting defects and measuring thickness. ...