D. Scardigno, A. Castellano, P. Foti, A. Fraddosio, S. Marzano, M.D. Piccioni
DICAR, Politecnico di Bari, Bari, Italy
Introduction: We study an innovative technology for water bottling using PET, aimed at reducing the thickness of the plastic bottles. The goals are the reduction of the amount of plastic used for a single water bottle, the reduction of the packaging costs and more environmental sustainability. The required thickness of the bottle depends on its structural function: when carried, the bottles are ...
Leiden, The Netherlands
A model for material damping is presented in terms of internal friction and in terms of a variation of stiffness. In the latter case the idea is that the stiffness increases if elastic energy is stored and decreases if elastic energy is released. In case of a single mass spring system “stiffness” refers to the stiffness of the spring; in case of a continues object &ldquo ...
Optimization of a High-Temperature High-Pressure Direct Wafer Bonding Process for III-V Semiconductors
R. Martin, J. Kozak, K. Anglin, and W. Goodhue
University of Massachusetts Lowell
Many optoelectronic devices utilize a heterojunction of a pair semiconducting materials including high-efficiency MEMS devices, solar cells, LEDs, and VCSELs. One fabrication technique which achieves such a device is direct wafer fusion. To optimize the process, COMSOL Multiphysics 4.0 was used to test various geometric configurations of the fixture. 2D and 3D models were created in order ...
F. Figueroa, P. Aguirre
Sensor Technik Wiedemann GmbH, Kaufbeuren, Germany
Circuit board failures are often ignored because they could be impreceptible. This simulation examines how internal layers around a soldered pin via subject to temperature changes during the soldering process are affected, show the forces involved and determine breaking points. A 2D thermo-mechanical model of a soldered pin is achieved in two simulation steps. First, a connecting pin already ...
Determination of the Fundamental Resonant Modes of a Polysilicon H-Beam Using COMSOL Multiphysics® Software
T. Thomas, M. Sundaram, R. Bejam
Birla Institute of Technology and Science, Pilani - Pilani Campus, Rajasthan, India
A Polysilicon H-beam is a micro-machined structure consisting of two primary members connected by a third member of much lower width and much greater aspect ratio. This structure exhibits interesting vibration behavior at specific frequencies which are known as resonant modes. A ‘mode’ may be described as a specific physical shape that the vibrating object assumes at peak oscillation amplitude ...
Multiphase Transport with Large Deformations Undergoing Rubbery-Glassy Phase Transition: Applications to Drying
T. Gulati, A. Datta
Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY, USA
Drying of biomaterials such as foodstuffs involves mass, momentum and energy transport along with large shrinkage of the porous material, which have significant effects on their final quality. Foodstuffs exhibit non-linearity when undergoing large deformations that affect the transport process in a critical way. Thus, it becomes important to perform a two-way coupling of the multiphase transport ...
V-M. Pulkkanen, and M. Olin
VTT Technical Research Centre of Finland, Espoo, Finland
A compacted bentonite clay buffer is planned to be used as a part of the engineered barrier system in the KBS-3 concept for the disposal of spent nuclear fuel. Simulations together with experimental studies are needed to ensure that bentonite fulfills its safety functions in the concept. In this paper, one type of bentonite model, namely a thermomechanical model developed by Jussila, is ...
G.Lelli, M. Pinsagli , and E. di Maio
Alcantara S.p.A. (Application Development Center), Nera Montoro, Italy
University of Naples "Federico II" (Department of Materials and Production Engineering), Naples, Italy
Physical and mechanical studies of Alcantara® have shown very pronounced anisotropic nonlinear features. Using constitutive equations borrowed from the modelling of biological tissues like tendons and/or arteries under the form of hyperelastic free-energy functions, a good representation of such mechanical features can be obtained. In particular, a combination between the optimization module ...
Development and Production of a Box for Storage and Shipping of HDIs in the Upgrade of the CMS Experiment
F. Noto, S. Costa, N. Giudice, F. Librizzi, A. Rapicavoli, M.A. Saizu, V. Sparti
Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Dipartimento di Fisica ed Astronomia, Università di Catania, Catania, Italy
 Dipartimento di Fisica ed Astronomia, Instituto Nazionale Fisica Nucleare, Sezione di Catania, Catania, Italy; Università di Catania, Catania, Italy
Instituto Nazionale Fisica Nucleare - Sezione di Catania, Catania, Italy
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest-Magurele, Romania
The Large Hadron Collider at CERN has begun operations at 7 TeV center of mass energy. CERN plans to run at this energy until the end of 2012 with the goal of providing an integrated luminosity of a few fb?¹ to the CMS and ATLAS experiments. The LHC will then shut down for 1.5 to 2 years to make the revisions necessary to run at ~14 TeV. Operation resumes in 2014. In 2017/18, there will be ...
Technical university of Liberec, Department of Material Engineering, Liberec, Czech Republic
Woven composites with basalt reinforcement plain 1x1 are examined to define structural mechanics. Woven composites were created by the prepreg technology, 8 layers of plain-weave basalt fabrics were saturated by the precursor, polysiloxane matrix Lukosil®, and joint pressed during temperatures of 200°C and 600°C. The yarns consist of 8000 fibres assembled without twisting. Voids complete entire ...