A computational response surface study of curved-surface-curved-edge aluminum hemming using solid-to-shell mapping

Guosong Lin, S. Jack Hu, Muammer Koç, Wayne Cai, Michael L. Wenner

Research output: Contribution to conferencePaper

Abstract

Hemming is a manufacturing process of folding a panel onto itself or another sheet. Quality of hemming is characterized by geometry and formability. This paper presents a response surface study of 3D curved-surface-curved-edge hemming of an aluminum alloy, AA6111-T4, using finite element analysis. Solid elements and explicit FE solver are used for simulations of flanging, pre- and final hemming, and shell elements with implicit solver are deployed for springback prediction. A novel procedure called "solid to shell mapping" is developed to bridge the solid elements with the shell elements. Verified to be accurate and efficient, the model is utilized in a Central Composite Design to quantitatively explore the relationships between certain key process variables and the hem dimensional quality and formability. The most significant variables are identified as (i) pre-hemming angle on roll-in/roll-out; (ii) nominal surface curvature on sheet springback; (iii) initial sheet strain and flanging die radius on the maximum hemline surface strain of the produced hem. These results provide insights for process parameter selections in designing and optimizing 3D hems under material formability constraints.

Original languageEnglish
Publication statusPublished - 30 Nov 2006
EventInternational Conference on Manufacturing Science and Engineering, MSEC 2006 - Ypsilanti, MI, United States
Duration: 8 Oct 200611 Oct 2006

Other

OtherInternational Conference on Manufacturing Science and Engineering, MSEC 2006
CountryUnited States
CityYpsilanti, MI
Period8/10/0611/10/06

    Fingerprint

Keywords

  • Aluminum hemming
  • Central composite design
  • Dimensional quality
  • Formability
  • Solid-to-shell mapping

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Lin, G., Jack Hu, S., Koç, M., Cai, W., & Wenner, M. L. (2006). A computational response surface study of curved-surface-curved-edge aluminum hemming using solid-to-shell mapping. Paper presented at International Conference on Manufacturing Science and Engineering, MSEC 2006, Ypsilanti, MI, United States.