Long brittle crack arrestability is extremely important in welded joints of heavy gauge steel plates used in large container ships. Recently, much attention has been focused on potential long crack propagation along welds produced by large heat input welding. This paper examines the application of a fillet Tee joint to the strength deck structure of container ships to enhance crack arrestability. Ultra-large scale crack propagation tests were conducted to investigate long brittle crack propagation/arrest behavior in fillet Tee joint structures with varied plate thicknesses and weld metal toughness levels. The test results showed that a Tee joint structure with an appropriate fillet weld metal toughness for the thickness of heavy gauge plates arrests a long brittle crack in the fillet weld metal. This phenomenon shows the advantage of using a fillet Tee joint for long brittle crack arrest in the strength deck structures of large container ships.
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The Twenty-fifth International Ocean and Polar Engineering Conference
June 21–26, 2015
Kona, Hawaii, USA
ISBN:
978-1-880653-89-0
Effect of Fillet Weld Metal Toughness on Long Brittle Crack Arrest Behavior in Tee Joint
Masanobu Toyoda;
Masanobu Toyoda
Japan Marine United Corporation
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Noboru Kiji;
Noboru Kiji
Kure Shipyard, Japan Marine United Corporation
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Seita Watanabe;
Seita Watanabe
Kure Shipyard, Japan Marine United Corporation
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Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, Kona, Hawaii, USA, June 2015.
Paper Number:
ISOPE-I-15-718
Published:
June 21 2015
Citation
Handa, Tsunehisa, Toyoda, Masanobu, Kiji, Noboru, Inose, Koutarou, Watanabe, Seita, Shiomi, Hiroshi, Igi, Satoshi, and Kenji Oi. "Effect of Fillet Weld Metal Toughness on Long Brittle Crack Arrest Behavior in Tee Joint." Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, Kona, Hawaii, USA, June 2015.
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