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A coupled thermal-structural finite element analysis of a single pulse micro-EDM process

  • Ministry of Education of the People's Republic of China
  • Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

Abstract

A three-dimensional coupled thermal-structural model for micro electrical discharge is presented in this paper. Temperature field and thermal stress field of a single spark discharge process are analysed using this model by indirect coupling method. Temperature field is firstly solved which acts as the foundation of solving thermal stress field. To make the simulation results more reliable, these important elements are also taken into account, such as temperature-dependent properties of material, the phenomenon of plasma channel radius expanding, the percentage of discharge energy transferred to the workpiece and Gaussian distribution of heat flux. The results can explain the formation of cracks around the discharge crater. The thickness of the white layer and residual stresses can be predicated using this model.

Original languageEnglish
Title of host publicationProgress in Manufacturing Automation Technology and Application
PublisherTrans Tech Publications Ltd
Pages86-90
Number of pages5
ISBN (Print)9783037858271
DOIs
StatePublished - 2014

Publication series

NameKey Engineering Materials
Volume579-580
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Keywords

  • Coupled thermal-structural model
  • Finite element analysis
  • Micro-EDM

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