Materials Literature
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In this study, the dynamic behavior of tapered isotropic and orthotropic plates subjected to the air blast loading is investigated numerically. In-plane stiffness, inertia and the geometric nonlinearity effects are considered in the formulation of the problem. The equations of motion for the plate are derived by the u…
This paper shows the existence of a critical dimension for finite length nanowires exhibiting shape memory effects. We give a brief survey of phase transformations, their classifications, and provide the basis of mathematical models for the phenomena involving such transformations, focusing on shape memory effects at…
European Symposium on Phase Change and Ovonic Science, Politecnico di Milano, Milan, Italy, September 6-7, 2010
Reaching a crossroads! Starting from 2-methylnaphthalene or 2,3,6-trimethylphenol, vitamin K3 or the vitamin E precursor, 2,3,5-trimethyl-p-benzoquinone, can be easily synthesized by using an in situ iron catalyst with hydrogen peroxide as the terminal oxidant. The temperature and the amine ligand control the outcome…
Low coefficient of thermal expansion (CTE) prepreg is used, instead of the conventional high-CTE material like acrylic adhesive, as a bonding sheet to improve the reliability of rigid-flex printed circuit (RFPC). No-flow polyimide prepreg is then developed to fulfill the requirement of minimizing resin flow. Thermal c…
Neutron emission measurements by means of helium-3 neutron detectors were performed on solid test specimens during crushing failure.The tests were carried out at the Laboratory of Fracture Mechanics of the Politecnico di Torino.The materials used were marble and granite, selected in that they present a different behav…
As pastilhas de freio sao materiais compositos que tem sido constantemente aperfeicoadas, principalmente pela substituicao por materiais que melhorem o desempenho destes elementos ou diminuam os impactos ao homem e ao meio ambiente. Com a procura de materiais de fontes renovaveis para substituir materiais sinteticos,…
This chapter contains sections titled: Introduction Optical Waveguide Discontinuity Problem Finite-Element Analysis of Discontinuity Problems Derivation of Finite-Element Matrices Application of Taylor's Series Expansion Computation of Reflected, Transmitted and Radiation Waves Optical Fibre Facet Problem Finite-Eleme…
The reliability of printed circuit boards under dynamic loads is a key issue in the handheld electronic products industry. To be able to predict the performance of the boards in their application lifetime different tests were developed. The current industry-wide standard testing method is a drop-shock-test. In this te…
The spine is performing three very fundamental functions: supporting (for braincase and shoulder and pelvis girdle), protecting (for core and roots of a spinal nerve) and motor activity (insertion place of head and neck, trunk and limbs muscles). The spine the main movement organ, which is submitted of variable and co…
This chapter contains sections titled: Introduction Numerical Analysis The UPWIND Scheme for Flux Calculation Nondiffusive Scheme for the Flux Calculation 2D Formulation of the FVTD Method Boundary Conditions Nonlinear Optics Nonlinear Optical Interactions Extension of the FDTD Method to Nonlinear Problems Extension o…
International audience
FOR MANY YEARS, people could safely assume the clear disposable containers that held their soda or iced coffee were made of polystyrene or polyethylene terephthalate (PET). But thanks to a new generation of clarifying agents, it’s becoming increasingly likely that they are drinking out of polypropylene cups. Versatile…
Inspired by the current state-of-the-art and the progressing advancements in the field of self-healing materials, this thesis addresses several novel routes to advance the concept of liquid-based self-healing polymer systems. This thesis presents the concept and characterisation of a one-component solvent-based healin…
Silica coatings from polysilazane precursors were prepared to protect ancient glass from weathering. Polysilazane can be converted to silica by simple exposition to air or basic vapours and the properties of the synthesized film make this precursor a valuable choice to obtain solid, crack-free, highly adhesive and pro…
International audience
It is well known from experiments and industrial applications of cold crucible melting that an intense AC magnetic field can be used to levitate large volumes of liquid metal in the terrestrial conditions. The levitation confinement mechanism for large volumes of fluid is considerably different from the case of a smal…
The description of the chemical bonding in intermetallic compounds is often not straight forward. Based on the electron localization approach the chemical bonding in intermetallic compounds is described in real space by M. Armbrüster et al. in the Full Paper on page 10357 ff. Physical property measurements were applie…
This work was supported by the Ministerio Ciencia e Innovacion of Spain under project FIS2008-05856-C02-02 and by the ”Generalitat Valenciana” of Spain under project ACOMP/2010/156.
Composite materials have good rigidity-to-weight and strength-to-weight ratios, thanks to the combination of properties of the matrix and the reinforcement. However most of the production means rely on manual steps and therefore is costly for an industrial product. Pultrusion is an automated technological process to c…