Articles techniques et présentations

A computationally efficient nonlinear constitutive model is developed for magnetostrictive materials using energy minimisation and discrete-energy averaging techniques. Computational time was considerably reduced through a local linearization of the material response and subsequent ... En savoir plus

Dielectric elastomers are a promising group of smart materials, which finds application within many fields such as soft robotics, wave-energy harvesting, and loud speakers. A dielectric elastomer consists of a thin, stretchable polymer film sandwiched between two compliant electrodes. ... En savoir plus

Ion mobility spectrometry provides fast detection of very low concentrations of chemical substances. Simple instrumentation combined with high sensitivity and high selectivity are the advantages of this technique. One well established field of application is the detection of hazardous ... En savoir plus

A simple proximity sensing circuit is made using magnets actuating reed switches; these switches are wired into a larger circuit that performs auxiliary functions. The success or failure of such systems is a function of their position. A simulation using COMSOL Multiphysics is conducted ... En savoir plus

The objective of this research is to design a millimeter scale broadband energy harvester device through the use of a multi-cantilever beam approach with a non-linear geometry. In this research, we use COMSOL Multiphysics® software to design, simulate and analyze the voltage and power ... En savoir plus

We have developed a small environmental chamber to expose a sample to adjustable climate conditions. This climate chamber will be used as sample environment for small-angle neutron scattering (SANS) experiments. SANS is a favorable measuring method, to explore structural changes on the ... En savoir plus

Grating couplers are a common optical component for introducing light into chip-based photonic structures. They are used extensively for optical interconnects and optical device integration. A microfluidic diffraction grating coupled waveguide (MDGCW) biosensor applies a grating coupler ... En savoir plus

Brain-Machine Interfaces (BMI) provide a direct communication link between brain and external devices such as speech synthesizers and robotic prosthesis to restore speech and movement in persons affected by Spinal Cord Injuries or neurodegenerative diseases such as Amyotrophic Lateral ... En savoir plus

FEM (Finite Element Method) modelling software such as COMSOL Multiphysics® can be a powerful tool for modelling the behavior and response of piezoelectric materials and devices [1]. Devices based on piezoelectric crystals are particularly well suited, because the polarization magnitude ... En savoir plus

Acoustic wave propagation due to the breakage or slippage of reinforced wire in water-filled prestressed concrete cylinder pipe (PCCP) attracts interest in non-destructive pipe testing. Current practice of acoustic emission (AE) detection and wire-break related events (WRE) recognition ... En savoir plus