Ultrasonic welding stress distribution measured with optical rosette/ring-core method

Wei Ren, Keyu Li, Zhili Feng

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

Ultrasonic spot welding is a novel solid-state joining technique for automotive body structures. The residual stresses, caused by the inhomogeneous deformation during the welding process, are considered to be a major factor affecting the strength and quality of the weld. Many conventional measurement methods cannot be applied because of the small size of the spot weld. In this study, the ISSR/ring-core cutting method is applied to measure the residual stresses on the ultrasonic spot weld. The ISSR possesses the short gage length and high sensitivity. The ring-core cutting was conducted on the back of the spot weld. The tensile residual stresses were obtained. The measured tensile residual stresses added to the operation stresses could cause the initiation of the cracks.

Original languageEnglish
JournalSAE Technical Papers
DOIs
StatePublished - 2005
Event2005 SAE World Congress - Detroit, MI, United States
Duration: Apr 11 2005Apr 14 2005

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