QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY
Print ISSN : 0288-4771
Effect of Un-welded Length on Behavior of Brittle Crack Arrest in Tee joint structure
Tsunehisa HANDAShinichi SUZUKINoboru KIJIMasanobu TOYODATakashi MIYATA
Author information
JOURNALS FREE ACCESS

2008 Volume 26 Issue 2 Pages 124-130

Details
Abstract

In the large heat input weld joint of heavy gauge steel plate used for large container carrier, a brittle crack possibly propagates straightly along a weld joint without diverging to base metal. This phenomenon is being discussed for its application to the large heat input weld of heavy gauge plate to ship structures. In this study, to arrest a brittle crack at Tee joint embedding un-welded face, the effect of un-welded face on behavior of brittle crack propagation/arrest in Tee joint structure was investigated and analyzed. The ESSO test of Tee joint structure was carried out, supposing that a brittle crack which propagates along a weld joint of hatch coaming rush into Tee joint of hatch coaming and strength deck. The test results exhibited that the brittle crack arrested at the Tee joint embedding un-welded face, and the brittle crack arrested easier, the longer un-welded face was. The results of static FEM analysis showed that stress intensity factor of brittle crack was increased by un-welded face, until brittle crack reached a flange. However, when brittle crack propagate into the flange, stress intensity factor of brittle crack was decreased by un-welded face for instance. The crack-arrest effect of un-welded face appears remarkably after brittle crack propagates into the flange.

Information related to the author
© 2008 by JAPAN WELDING SOCIETY
Previous article Next article
feedback
Top