| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Ayoub, Georges
Processes and Engineering in Mechanics and Materials
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2023Benchmarking the Tensile Properties of Polylactic Acid (PLA) Recycled Through Fused Granule Fabrication Additive Manufacturing
- 2023System Identification of Fused Filament Fabrication Additive Manufacturing Extrusion and Spreading Dynamics
- 2020Modeling the visco-hyperelastic–viscoplastic behavior of photodegraded semi-crystalline low-density polyethylene filmscitations
- 2020Effect of UV-aging on the mechanical and fracture behavior of low density polyethylenecitations
- 2018Effect of UV Ageing on the fatigue life of bulk polyethylenecitations
- 2018Effect of UV Ageing on the fatigue life of bulk polyethylenecitations
- 2016Microstructural observations and tensile fracture behavior of FSW twin roll cast AZ31 Mg sheetscitations
- 2016Mechanical, microstructural and fracture properties of dissimilar welds produced by friction stir welding of AZ31B and Al6061citations
- 2015Observations of the mechanical response and evolution of damage of AA 6061-T6 under different strain rates and temperaturescitations
- 2014A two-phase hyperelastic-viscoplastic constitutive model for semi-crystalline polymers: Application to polyethylene materials with a variable range of crystal fractionscitations
- 2012Fatigue life prediction of rubber-like materials under multiaxial loading using a continuum damage mechanics approach: Effects of two-blocks loading and R ratiocitations
- 2011Effects of crystal content on the mechanical behaviour of polyethylene under finite strains: Experiments and constitutive modellingcitations
- 2011A continuum damage model for the high-cycle fatigue life prediction of styrene-butadiene rubber under multiaxial loadingcitations
- 2010Modelling large deformation behaviour under loading–unloading of semicrystalline polymers: Application to a high density polyethylenecitations
- 2008Experimental study of chemo-mechanical response of amorphous poly(lactic acid) films exposed to UV irradiation
Places of action
| Organizations | Location | People |
|---|
document
System Identification of Fused Filament Fabrication Additive Manufacturing Extrusion and Spreading Dynamics
Abstract
In fused filament fabrication additive manufacturing, polymer extrusion and spreading dynamics affect build quality in both surface finish and mechanical properties. The state of the art in extrusion modeling and control is identification and compensation of a fixed first order pole with a linear model of the system. However, physical nonlinearities cause deviation of this pole in practice. To advance the aim of slicing using accurate nonlinear dynamic models, this work presents a system and procedure for automated measurement of dynamic bead extrusion. The system uses a belt printer, iFactory3D One Pro, with nozzle tilted 45 degrees from the build belt, and a snapshot 3D scanner. Single layer prints in polylactic acid (PLA) are scanned and then automatically ejected. The gcode for the single bead print holds the gantry speed fixed or extrusion speed constant while the extrusion flow rate or gantry speed is varied as a step input signal in space. The experiment design matrix varied two variables: gantry speed and extrusion flow rate. Time constants are fitted to bead area signals that are extracted from the scan data to obtain nonlinear models. Depending on the experiment condition, the percent difference between the highest time constant and the lowest time constant ranged from 279% to 61%, confirming the high nonlinearity of the extrusion system in FFF 3D printers. Additionally, measurements are performed on a cartesian 3D printer with a 2D scanner to test applicability of the methods to a general audience and verify observed trends. It was observed that larger steps in extrusion velocity for a constant X-Axis velocity, yielded smaller time constants, while the same steps in velocity using a constant extrusion velocity condition with variable X-Axis velocity, yielded the opposite trend. Moreover, the time constants for a step up in extrusion velocity yielded higher overall values in time constant when compared to step down conditions.