Articles techniques et présentations

The Fraunhofer Ernst-Mach-Institute (EMI) developed a novel, high-g accelerometer, which is an undamped MEMS device, containing self-supporting piezoresistive elements. The main requirements for such a sensor are high sensitivity, high resonant frequency and a solid mechanical design. ... En savoir plus

A lixiviation-mechanical coupled model is developed for fiber reinforced concrete within this framework; both the influence of chemical degradation on short and long term mechanical behavior and the influence of mechanical loading on the diffusion coefficient can be considered. The ... En savoir plus

Electric construction components exposed to alternating high voltage have to withstand a significant amount of thermal loads and, resulting from the changes in Temperature , structural stresses. In order to achieve minimization of these loads, optimizing the geometry can be a helpful ... En savoir plus

Significant volumes of the worlds proved reserves are in dolostone reservoirs. Scope for recovery and success/upside of new exploration plays depend on the chances of encountering dolostone reservoirs with good reservoir properties. Although dolostones make excellent reservoirs in ... En savoir plus

An "electroacoustic absorber" is a loudspeaker, used as an absorber of sound, which acoustic impedance can be varied by electrical means. This can be achieved either by plugging passive shunt electric networks at the loudspeaker terminals ("shunt loudspeakers") or by feeding back the ... En savoir plus

Finite element simulations performed through COMSOL Multiphysics are used to study the long-term performance of BHE fields placed in a water-saturated porous soil subjected to groundwater movement. The heat transfer problem is written in a dimensionless form and the long-term time ... En savoir plus

The article deals with the magnetically-supported high-power full-penetration laser beam welding of aluminum. A stationary simulation was conducted accounting for the effects of natural convection, Marangoni convection and solid-liquid phase transition as well as an electromagnetic ... En savoir plus

Even though the researches in synchronous machines are advanced, the practical design still is a problem because of the complex interaction between several design parameters. The project “EaSync” at the Ostfalia University focuses on the bundling of machine models using COMSOL ... En savoir plus

Since October 2009 the laboratory of ATE has carried out collaborative research with the WTD 71 that aims for prediction, reduction and optimization of so-called underwater electric potential (UEP) signatures. COMSOL is used to simulate potential distributions in the context of impressed ... En savoir plus

This article describes the response of the knitted fabric to the mechanical loading and how a simplified FE model can approach realistically the response of the structure to the mechanical loading. The knitted fabric is made of nitinol material, which belongs to the group of shape memory ... En savoir plus