Physical Modeling for Selective Laser Sintering Process

Author:

Gobal Arash1,Ravani Bahram2

Affiliation:

1. Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616 e-mail:

2. Fellow ASME Professor Department of Mechanical and Aerospace Engineering, University of California, Davis, CA 95616 e-mail:

Abstract

The process of selective laser sintering (SLS) involves selective heating and fusion of powdered material using a moving laser beam. Because of its complicated manufacturing process, physical modeling of the transformation from powder to final product in the SLS process is currently a challenge. Existing simulations of transient temperatures during this process are performed either using finite-element (FE) or discrete-element (DE) methods which are either inaccurate in representing the heat-affected zone (HAZ) or computationally expensive to be practical in large-scale industrial applications. In this work, a new computational model for physical modeling of the transient temperature of the powder bed during the SLS process is developed that combines the FE and the DE methods and accounts for the dynamic changes of particle contact areas in the HAZ. The results show significant improvements in computational efficiency over traditional DE simulations while maintaining the same level of accuracy.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Computer Graphics and Computer-Aided Design,Computer Science Applications,Software

Reference32 articles.

1. Simulation of Selective Electron Beam Melting Processes,2011

2. Binding Mechanisms in Selective Laser Sintering and Selective Laser Melting;Rapid Prototyping J.,2005

3. Consolidation Phenomena in Laser and Powder-Bed Based Layered Manufacturing;Procedia CIRP,2007

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