Experimental and numerical investigation of forming limits in incremental forming of a conical cup

Y. Huang, J. Cao, K. S. Smith, B. Woody, J. Ziegert, M. Li

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

13 Scopus citations

Abstract

Accurate prediction of forming limits is critical to process planning and part design. It has been found in literature that forming limit curves (FLC) generated from incremental forming (IF) processes greatly exceed the traditional forming limit curves obtained from sheet metal stamping. In this paper, a ductile fracture criterion is introduced in an effort to predict the forming limit in an incremental forming process. Based on calculated stress/strain values from the finite element simulation, the fracture initiation site and the maximum forming height of a conical cup are predicted using the ductile fracture criterion. The numerical results are compared with our experimental results and the strain-based forming limits found in literature. It is concluded that the approach has some merits, however, is not entirely satisfactory. Discussions on the causes of the discrepancy are provided.

Original languageEnglish
Title of host publicationTransactions of the North American Manufacturing Research Institution of SME - Paper Presented at NAMRC 36
Pages389-396
Number of pages8
StatePublished - 2008
Externally publishedYes
EventTransactions of the North American Manufacturing Research Institution of SME - Monterrey, Mexico
Duration: May 20 2008May 23 2008

Publication series

NameTransactions of the North American Manufacturing Research Institution of SME
Volume36
ISSN (Print)1047-3025

Conference

ConferenceTransactions of the North American Manufacturing Research Institution of SME
Country/TerritoryMexico
CityMonterrey
Period05/20/0805/23/08

Keywords

  • Forming limit
  • Fracture criterion
  • Single point incremental forming (SPIF)

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