On the topology optimization design for the stereolithography based investment casting model

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

The purpose of this paper is to avoid the crack problem of the ceramic shell during the burnout procedure of the rapid investment casting using stereolithograghy (SLA) model. Since the coefficient of thermal expansion of the SLA model is much higher than the coefficient of the ceramic shell, the internal structural patterns have to be properly designed to reduce the stress level in the ceramic shell. A topology optimization method is proposed here to find better microstructure designs to satisfy both the strength of the ceramic shell and the stiffness of the SLA model itself. Taking the arrayed microstructure into account, the pseudo-densities of the SLA model elements to describe the material layout are defined and assumed as the design variables. By deriving the design sensitivities, the topology optimization problem is solved with reasonable numerical results generated.

Original languageEnglish
Title of host publicationManufacturing Engineering and Automation I
Pages1464-1467
Number of pages4
DOIs
StatePublished - 2010
Event2010 International Conference on Manufacturing Engineering and Automation, ICMEA2010 - Guangzhou, China
Duration: 7 Dec 20109 Dec 2010

Publication series

NameAdvanced Materials Research
Volume139-141
ISSN (Print)1022-6680

Conference

Conference2010 International Conference on Manufacturing Engineering and Automation, ICMEA2010
Country/TerritoryChina
CityGuangzhou
Period7/12/109/12/10

Keywords

  • Investment casting
  • Lattice structure
  • Stereolithography
  • Topology optimization

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