Publications
Experimental evaluation of the metal powder particle flow on the melt pool during directed energy deposition Vrije Universiteit Brussel
Measuring and Predicting the Effects of Residual Stresses from Full-Field Data in Laser-Directed Energy Deposition Vrije Universiteit Brussel
steel specimens is measured and then used to ...
Experimental identification of process dynamics for real-time control of directed energy deposition Vrije Universiteit Brussel
Real-time control of melt pool temperature, deposition width, and height has shown to deliver significant improvements in both material properties and part geometry during the laser based directed energy deposition process. For accurate controller design a mathematical model of the complex DED process is required. In this paper an experimental frequency-domain system identification approach to autonomously obtain a transfer-function model ...
Full-Field Modal Analysis by Using Digital Image Correlation Technique Vrije Universiteit Brussel
At the state of art, the design validation of mechanical products in automotive, aerospace, and other advanced manufacturing industries is made by using vibration measurements and experimental modal analysis. The structures’ dynamic behavior is investigated mostly using contact transducers (accelerometers, strain gauges, load cells, …). Optical methods such as Digital Image Correlation (DIC) have recently received special attention in the ...
Numerical and experimental study of a crack localisation system embedded in 3D printed smart metallic components Vrije Universiteit Brussel
Prediction of build geometry for DED using supervised learning methods on simulated process monitoring data Vrije Universiteit Brussel
Wave propagation visualization through ducts using the Schlieren technique for crack localization with the eSHM system Vrije Universiteit Brussel
The effective structural health monitoring (eSHM) system fully exploits the flexibility offered by the 3D printing process for analysis of the structural integrity of additive manufactured parts by integrating a smart technology inside the component. The eSHM system relies on the propagation of pressure waves through capillaries/small ducts embedded in 3D printed metallic components and allows the detection and localization of fatigue cracks. ...
Let’s Make Ball Balancing Great Again: Why You Should Use Temporary Speed Reduction Vrije Universiteit Brussel
Automatic ball balancing is a technique adopted in rotordynamics to reduce unknown rotor unbalance automatically. This technique sounds appealing as it can ease a panoply of balancing issues considerably. The presence of stiction, however, scatters consistent qualitative balancing and led to a limited implementation in the industry. Temporary speed reduction, a recent technique, could be used as a countermeasure for the stiction-induced ...
Reducing the statistical scatter of automatic ball balancers using temporary speed reduction Vrije Universiteit Brussel
For as long as Automatic Ball Balancers are used as a means to automatically reduce unbalance in rotating machinery, it is known that these are prone to some statistical scatter in their balancing behaviour due to stiction. This diffusion leads to non-repetitive runs which has lead to a limited implementation in industry. Presented in this paper is a new balancing procedure showing that a temporary speed reduction strategy can lead to a ...