Investigation of hydroforming of sheet metals with varying blankholding loads

Mohammad M. Dehghani, Wei Jiang, J. Rasty

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

3 Scopus citations

Abstract

The effects of draw-in during hydroforming axisymmetric copper sheet has been investigated. The finite element analysis collaborated with existing experimental results has been employed to study the forming process under different blankholding conditions. It is found that draw-in will reduce the strain level in the deformed blank, and a higher polar height can be achieved when draw-in is present. Strain state in the general area of the blank remains at nearly biaxial tension under different draw-in conditions. However, draw-in has strong effect on the strain state at the die shoulder area. Excessive draw-in will increase the tendency toward wrinkling at the die shoulder area. The results show that in order to eliminate wrinkling, a high initial blankholding load is needed to deform the material drawn from the flange in axisymmetric hydroforming process. In later stages of the process, draw-in becomes beneficial and, hence, a lower blankholding load should be applied.

Original languageEnglish
Title of host publicationComputational Methods on Materials Processing
PublisherPubl by ASME
Pages87-96
Number of pages10
ISBN (Print)0791811158
StatePublished - 1992
EventWinter Annual Meeting of the American Society of Mechanical Engineers - Anaheim, CA, USA
Duration: Nov 8 1992Nov 13 1992

Publication series

NameAmerican Society of Mechanical Engineers, Materials Division (Publication) MD
Volume39

Conference

ConferenceWinter Annual Meeting of the American Society of Mechanical Engineers
CityAnaheim, CA, USA
Period11/8/9211/13/92

Fingerprint Dive into the research topics of 'Investigation of hydroforming of sheet metals with varying blankholding loads'. Together they form a unique fingerprint.

Cite this