Frictional effect of ultrasonic-vibration on upsetting

Jung Chung Hung, Yu Chung Tsai, Ching-Hua Hung*

*Corresponding author for this work

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

The ultrasonic-vibration ring compression test and finite element analysis were performed on aluminum alloy specimens to explore the frictional effect of superimposing ultrasonic-vibration during upsetting. The extrapolated compression test was first adopted to obtain the frictionless material properties for finite element analysis. Experimental results of extrapolated compression test also indicate that ultrasonic-vibration can reduce the compressive force when friction is eliminated and can increase the temperatures of a material at the same time. The following results of the hot extrapolated compression test and the hot ring compression test reveal that increasing temperature by ultrasonic-vibration may reduce the flow stress and increase the interfacial friction. Finally, finite element analysis was conducted to derive the friction calibration curves and to evaluate the friction factor.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalUltrasonics
Volume46
Issue number3
DOIs
StatePublished - 1 Jun 2007

Keywords

  • Aluminum alloy
  • Extrapolated compression test
  • Finite element simulation
  • Hot ring compression
  • Interfacial friction
  • Ultrasonic-vibration

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