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  4. Material- und Prozessmodellierung zur effizienten FEM-Berechnung der Verzugsentstehung beim Laser-Sintern von teilkristallinen Thermoplasten
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00105902-19

Material- und Prozessmodellierung zur effizienten FEM-Berechnung der Verzugsentstehung beim Laser-Sintern von teilkristallinen Thermoplasten

Veröffentlichungsdatum
2017-03-30
Autoren
Neugebauer, Fabian  
Betreuer
Ploshikhin, Vasily  
Gutachter
Witt, Gerd  
Zusammenfassung
This thesis presents a method for fast numerical calculation of warpage in laser sintering of semicrystalline thermoplastics. The developed model is based on the simulation of the thermal interaction in the building chamber, caused by different thermal boundary conditions. For that purpose, a finite element mesh of the whole building space is generated. The interaction of the thermal boundary conditions causes a time dependent temperature eld, which influences the crystallization progress and in consequence the volume shrinkage. Subsequently to the thermal calculation, that shrinkage strain is used as time-space dependent mechanical load in a sequence of static mechanical FEM-computations of the part distortion. The developed approach allows the prediction of part warpage caused by macroscopic boundary conditions of real parts for the first time and has been used to analyse several test samples as well as real industrial parts.
Schlagwörter
Laser sintering

; 

warpage

; 

FEM
Institution
Universität Bremen  
Fachbereich
Fachbereich 01: Physik/Elektrotechnik (FB 01)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Deutsch
Dateien
Lade...
Vorschaubild
Name

00105902-1.pdf

Size

28.79 MB

Format

Adobe PDF

Checksum

(MD5):98ee593c96dc793ca3b40b201f557697

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