ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In the selective laser sintering (SLS) manufacturing technique a pre-heated layer ofmaterial powder undergoes a laser radiation in a selective way to produce three dimensionalmetallic or polymeric solid parts. Here, we consider sintering of polymer powder. The phasetransformation in this process involves the material heat transfer which is strongly affected by thematerial sintering phenomena. A transient three dimensional finite element model is developed tosimulate the phase transformation during the selective laser sintering process. This model takes intoaccount the heat transfer in the material (powder and solid), the sintering and the transient nature ofthis process. The numerical simulation of the set of equations, describing the problem, is madepossible by means of the commercial finite element software Abaqus. A bi-level structureintegration procedure is chosen, in which the density is integrated at the outer level and the heatequation is integrated in the inner level. After successfully computing the integration of the density,a material Jacobian representing the thermal phenomena is computed and supplemented the AbaqusCode via an implicit user subroutine material. Results for temperature and density distribution,using a polycarbonate powder, are presented and discussed
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.553.75.pdf
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