The Simulation of Motion of a Slider upon a Stator Due to Frictional Force Using COMSOL Multiphysics® Software - new
H. B. Nemade
Indian Institute of Technology Guwahati, Guwahati, Assam, India
The Surface Acoustic Wave (SAW) linear motor was studied which is developed utilizing the friction principle for driving. The principle says that, when a slider is placed on the Rayleigh waves generated on a stator, the slider moves in reverse direction of the wave due to friction between the stator and the slider. A LiNbO3 piezoelectric substrate is used as a stator where comb structured Al ...
R. Tovo and S. Capetta
Dipartimento di Ingegneria, Università degli Studi di Ferrara, Ferrara, Italy
This paper is concerned with the fatigue behavior of complex, three-dimensional, stress concentrations under multiaxial loadings. Starting from the stress field obtained from a linear elastic analysis and taking advantage of the so-called implicit gradient approximation, an effective stress index connected with the material strength is calculated. Besides, this work summarizes a first ...
V. Antonucci, M. Esposito, R. Marzella, and M. Giordano
Institute for Composite and Biomedical Materials, CNR, Portici, NA, Italy
Imast, Portici, NA, Italy
A quasi static indentation test on a laminate composite has been investigated numerically and experimentally. In particular, the test has been implemented by COMSOL Multiphysics® and optimizing the Finite Element and mesh. In addition, the numerical strain results have been validated by the comparison with the respective experimental deformation data that have been obtained by fiber Bragg ...
Multiphysics Modeling and Simulation of MEMS based Variometer for Detecting the Vertical Speed of Aircraft in Avionics Applications
K. Umapathi, K. Sukirtha, C. Sujitha, K. A. Noushad, Venkateswaran, R. Poornima, R. Yogeswari
United Institute of Technology, Coimbatore, Tamil Nadu, India
Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India
The objective of this work is to develop a MEMS based Variometer to measure the vertical speed and to sense the instantaneous rate of climb or descent in Aircrafts to meet the miniaturization requirements in avionics industry. The design consists of dielectric material in between two micro electrodes. The micro diaphragm is placed on one of the electrode. As the aircraft changes altitude, the ...
Micromechanical Design of Novel Thermal Composites for Temperature Dependent Thermal Conductivity - new
R. C. Thiagarajan,
ATOA Scientific Technologies Pvt. Ltd., Bengaluru, Karnataka, India
Materials with an order variable in thermal conductivity as a function of temperature are desirable for thermoelectric heat energy recovery, building thermal insulation and solar thermal applications. Thermal Conductivity is an inherent material property. Engineering the fundamental thermal conductivity needs manipulation at thermal photon level for conventional materials. Engineering thermal ...
P. Ngankeu, and E. Gutierrez-Miravete
EMHART Glass Research Inc, Windsor, CT, USA
Rensselaer at Hartford, Hartford, CT, USA
The press and blow (P&B) process is widely used to produce glass containers. While the P&B process has demonstrated to be capable of reducing container weight by as much as 33%, it can also induce the formation of micro-checks that weaken container strength. This paper presents a model of the heat transfer due to the intermittent contact of glass with the plunger during several pressing ...
J. Wirth, S. Jack, M. Köhl, and K.-A. Weiß
Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany
The key issues of the Fraunhofer Institute for Solar Energy Systems are research and development of solar technologies for the fast growing market of solar energy. This paper presents examples of the usage of COMSOL Multiphysics: The ingress of water is a serious reason for the degradation of photovoltaic modules which can hardly be measured using experimental approaches yet. Therefore, a ...
J. Roche, P. Von Lockette, and S. Lofland
Mechanical Engineering Dept., Rowan University, Glassboro, NJ
Physics and Astronomy Dept., Rowan University, Glassboro, NJ
In this study, magneto-rheological elastomer (MRE) composite beams made of Barium hexaferrite (BaM) and Iron (Fe) powders combined with a highly-compliant matrix material were simulated using COMSOL\'s Solid Mechanics and AC/DC modules. The goal of the work was to develop models capable of predicting the actuation behavior of hard- and soft-magnetic MREs. This work simulates the bending of ...
R. C. Thiagarajan, and K. V. Chiranjeevi
ATOA Scientific Technologies Private Limited
The predictive engineering of materials is matured from predicting properties from known morphology or constituents to engineering novel morphology for superior properties. The focus of this paper is about implementation of computational material mechanics modeling method in COMSOL Multiphysics software for engineering the constituents for superior properties. A brief review of property ...
Y.F. Wang, Y.S. Wang, L. Wang
Institute of Engineering Mechanics, Beijing Jiaotong University, Beijing, China
Department of Mechanical Engineering, Østfold University College, Halden, Norway
We show in this paper that by careful design of the geometry of the resonators, complete bandgap with relatively low center frequency can be obtained for 2D and 3D Phononic Crystals with resonators. The generation of the bandgap is due to the local resonance of the unit cell. Spring-mass and spring-pendulum models are developed to predict the boundaries of the complete bandgap. The predicted ...