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


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
Issue number3
StatePublished - 1 Jun 2007


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

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