3D printing (or additive manufacturing) is a manufacturing process which is gaining popularity within the aerospace sector thanks to the possibilities offered by this technology to manufacture highly optimized and efficient, lightweight structures.
One of the most promising metal additive manufacturing methods is Directed Energy Deposition (DED), in which a laser selectively heats and melts powder in a powder stream that is directed directly at the print. By adding material tracks layer by layer a metal part is built. The mechanics of the melt pool are very important to the whole process and have a large influence on the quality of the print. The physics of the melt pool are complicated and not well understood.
The aim of the research is to compare two modelling strategies for best results in overheating predictions. Both part-scale and melt pool-scale simulations have been performed by NLR. This assignment will compare both methods with an in-depth study of both methods. It will use both methods on a test and also compare the results experimentally. This includes a literature study focussing on the relevant parameters affecting temperature distribution and thermal gradients throughout the part. You will investigate ways to control the thermal behaviour using variable process parameters and demonstrate with a thermal simulation model. For this, different types of software can be used, Abaqus, Simufact, or a MATLAB-based in-house tool. The simulations can be verified/validated with literature, thermal measurement data or thermal camera imaging data (if feasible) from the build job.
Duration and place
The duration of this assignment can vary between 3 and 9 months.
The location for this assignment is:
8316 PR Marknesse, Netherlands
Study direction: Aerospace Engineering, Mechanical Engineering, Structures and Materials, Material Science, Data Science
NLR requires a recent certificate of conduct (Verklaring Omtrent het Gedrag, VOG) from the applicant.
What we offer
- A challenging internship in a high-tech result orientated work environment
- Weekly supervision and availability of the technical staff for support
- Informal company culture with room for initiative, valuing a result-oriented and committed attitude
- An internship compensation
- NLR can support in finding accommodation in the vicinity of Marknesse if necessary.
The Royal Netherlands Aerospace Centre NLR is the research organization in the Netherlands in the field of aerospace engineering. Around 700 employees highly educated from aircraft engineers to psychologists and from mathematicians to application experts. Visit our NLR media channel on YouTube for a good impression of the organization.
ir. Jos Vroon, R&D Engineer
+31 88 511 47 16
Datum : 04/04/2023
Locatie : Marknesse
Opleidingsniveau : Stage
Achtergrond : Aerospace Engineering, Mechanical Engineering, Structures and Materials, Material Science, Data Science