The crack arresting characteristics of butt joint type welded crack arrester was investigated for Class E steel, which has been applied as the crack arrester in all-welded vessels, as well as that in the previous report.
The steel quality of Class E steel defined by the specification of ship classification society was evaluated from the viewpoint of crack arrester by using the large size crack arrester test specimens of 1, 300 mm wide. In addition, the steel quality as the crack arrester for a trially improved steel and an aluminum killed steel quenched and tempered were evaluated, too.
Then the design process how to determine the maximum distance between two adjacent arrester plates delivered was provided.
Finally, the crack arresting characteristics of stiffener type crack arrester was evaluated experimentally.
