A numerical approach to model the selective laser sintering (SLS) of polypropylene is proposed. A 3D thermal model was developed and thus enables the prediction of the temperature fields and the extension of the sintered area in the powder bed taking into account the phase change during multiple laser passes. Powderâliquid, liquidâsolid and solidâliquid phase changes were modelled during the SLS and the subsequent cooling processes. Then, a 3D thermomechanically coupled model was set up based on the temperature results of the thermal model in order to predict the distortion of the produced parts after cooling down. Different pre-heating temperatures were considered, highlighting their influence on the final part properties.
|Numero di pagine||12|
|Rivista||INTERNATIONAL JOURNAL, ADVANCED MANUFACTURING TECHNOLOGY|
|Stato di pubblicazione||Published - 2017|
All Science Journal Classification (ASJC) codes
- Control and Systems Engineering
- Mechanical Engineering
- Computer Science Applications
- Industrial and Manufacturing Engineering
Buffa, G., Fratini, L., Yan, C., Zhu, W., & Bo, S. (2017). A macroscale FEM-based approach for selective laser sintering of thermoplastics. INTERNATIONAL JOURNAL, ADVANCED MANUFACTURING TECHNOLOGY, 91, 3169-3180.